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11 International Symposium on The 2001 Bhuj Earthquake and Advances in Earthquake Science (AES 2011) (22-27 January 2011) LOCAL ORGANIZING COMMITTEE: Chairman : Ravi Saxena,Add. Chief Secretary, DST, Government of Gujarat Secretary : B.K. Rastogi, Director General, ISR, Gandhinagar Members : T.P. Singh, Director, BISAG A.M. Prabhakar, Director, Gujcost, Ahmedabad Dilip Gadhvi, Executive Director, Science City, Ahmedabad Jwalant Trivedi, Deputy Secretary, DST, Government of Gujarat NATIONAL ADVISORY COMMITTEE: Harsh K.Gupta, Panikkar Professor, NGRI, Hyderabad Sudhir Jain, Director, Indian Institute of Technology, Gandhinagar V. P. Dimri, Distinguished Scientist, NGRI, Hyderabad B. Bhattacharjee, Member, National Disaster Management Authority, New Delh J. R. Kayal, CSIR Emeritus Scientist, Jadavpur University, Kolkata B. R. Arora, Former Director, Wadia Institute of Himalayan Geology, Dehradun A.K. Singhvi, Outstanding Scientist & Dean, PRL, Ahmedabad Ajit Tyagi, Director General, India Meteorological Department, New Delhi B. K. Bansal, Advisor and Head (Seismology), Ministry of Earth Science, New Delhi R. K. Chadha, Scientist, National Geophysical Research Institute, Hyderabad O.P. Mishra, Geophysicist, Geological Survey of India, Kolkata INTERNATIONAL ADVISORY COMMITTEE: Alik Ismail-Zadeh, Secretary General, IUGG Wu Zhongliang, President, IASPEI Roger Bilham, Colorado University, USA Mark Petersen, Head Federal Earthquake Hazard Mitigation Program. USGS, Colorado Satish Singh, Instituite de Physique de Globe de Paris, France Ramesh P Singh, Vice-President, IUGG Georisk Commission T. Yokoi, Senior Research Scientist, IISEE, BRI, Japan Arantza Ugalde, Geological Survey of Cataluniya, Spain Amod Mani Dixit, President, National Centre for Disaster Management, Nepal i

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13 AES-2011 PROGRAM 21 st January, 2011 Time Program 15:00 18:00 Registration 18:30 19:30 Light & Sound show at Akshar Dham 20:00 21:00 Icebreaker 22 nd January, :00 10:00 Registration 10:00 11:00 Inauguration 1:00 12:00 High Tea Time Session Subject Place 12:00 13:00 ISES Lecture & Special Lecture 1 Auditorium 13:00 14:00 Lunch 14:00-16:00 Special Lectures(2,3,4,5,6,7) Auditorium 16:00-18:00 S1-8 Papers Bhuj Earthquake and Aftershock Studies Conference Room No-2 15:00-18:30 S16-14 Papers IGCP Session on Archeoseismology 16:00-18:30 Poster session in Display Area 19:00 21:00 Gala Dinner 08:00 8 :30 Registration 23 rd January, :30 09:30 Special Lectures(8,9) Auditorium 09:30 10:30 S4-6 Papers Paleoseismology and Historical Seismology 10:30 11:00 Tea 11:00 13:00 S14-7 Papers Ground Response Studies for Nuclear Power Plants 13:00 14:00 Lunch S12-7 Papers Remote Sensing, GPS & InSAR S4-6 Papers(continued) Paleoseismology and Historical Seismology 14:00 17:00 S3-12 Papers Seismicity and Earthquake Source Processes 17:00 17:30 Tea/Snacks S9-17 Papers Seismic Hazard Assessment / Microzonation Conference Room No-1 Conference Room No-1 Auditorium Conference Room No-2 Conference Room No-1 Auditorium Conference Room No-1 S2-11 Papers Intraplate Seismicity Conference Room No-2 17:30 18:30 Special Lecture 10 Auditorium 18:30 19:30 Poster session in Display area 20:00 21:00 Dinner iii

14 24 th January, 2011 Time Session Subject Place 08:30 10:30 S11-7 Papers Earth s Interior, Structure & Dynamics 10:30 11:00 Tea S5-18 Papers Earthquake Precursors and Prediction Studies S8-8 Papers Earthquake Ground Motion and Damaging Earthquakes 11:00 13:00 S7-9 Papers Real Time Seismology, Early Warning & Loss Assessment 13:00 14:00 Lunch S5-18 Papers(continued) Earthquake Precursors and Prediction Studies Auditorium Conference Room No-1 Conference Room No-2 Auditorium Conference Room No-1 S15-4 Papers Tsunami Modeling Conference Room No-2 14:00 15:00 Special Lectures (11, 12, 13) Auditorium 15:00 17:00 S6-6 Papers Seismic Wave Propagation, Amplification and Basin Effect 17:00 17:30 Tea S10-7 Papers Tectonics and Crustal Movements S13-4 Papers Exploration for Oil and Crustal Structure 17:30 18:30 Concluding Session 20:00 21:00 Dinner Auditorium Conference Room No-1 Conference Room No-2 iv

15 ISES Lecture Special-1 Special-2 Special-3 Special-4 Special-5 Special-6 Special-7 Special-8 Special-9 Special-10 Special-11 Special-12 Special-13 Special Lectures Program on study of earthquake precursors in India Harsh Gupta, Panikkar Professor National Geophysical Research Institute,Hyderabad Shailesh Nayak Secretary, Ministry of Earth Sciences, New Delhi India s tsunami warning system: A success story Harsh Gupta, Panikkar Professor, National Geophysical Research Institute,Hyderabad Time-varying Tsunami Characteristics in Wavelet Domain V.P.Dimri, Distiguished Scientist, NGRI, Hydrabad Making of probabilistic seismic hazard map of India for the Bureau of Indian Standards B.K. Rastogi, Director General Institute of Seismological Research, Gandhinagar New probabilistic seismic hazard map of India R.N.Iyengar Center of Disaster Mitigation,Jain University, Baglaore-Kanakapura Road, Jakkasandra Recommendations for earthquake safety and retrofitting in Gujarat Padmashree Dr. Anand S. Arya (FNA, FNAE; Ex-National Seismic Advisor MHA, GoI-UNDP Professor Emeritus of Earthquake Engineering, IIT- Roorkee Nuclear power program of India and seismic safety of Nuclear Power Plants S K Jain CMD, NPCIL, Mumbai Structure, tectonics & active faults of Kutch rift basin, Gujarat, Western India S. K. Biswas Formerly: Director, KD Malviya Institute Petroleum Exploration,ONGC, Dehradun A testable model for intraplate earthquakes Pradeep Talwani(Retired) Dept. of Earth and Ocean Sciences, University of South Carolina, Columbia,USA Space inputs in disaster monitoring, mitigation and early warning. R.R.Navalgund Director, Space Application Center,ISRO,Ahmedabad Bhuj 2001 earthquake revisiting existing knowledge of structural behavior of traditional and new constructions, geological hazards of the Kutch region and the regime of seismic safety Alpa Sheth, Seismic Advisor,GSDMA,Gandhinagar The road to seismic safety Sudhir Jain Director, IIT Gandhinagar. Bhuj earthquake and role of CEPT University in post disaster scenario V. R. Shah (H.O.D Structural Design department, CEPT University, Ahmedabad Page No v

16 LIST OF PAPERS Kn: Keynote (20 min), I: Invited (15 min), C: Contributed (15min), P: Poster Page No. S1: Bhuj Earthquake and Aftershock Studies 1 Session Chairman: Mark Petersen Co-Chairman: Prabhas Pande Session Date: 22 nd January, 2011 Session Time: 16:00 18:00 S1_Kn1 S1_Kn2 S1_Kn3 S1_I1 S1_I2 S1_I3 S1_C1 S1_C2 S1_P1* S1_P2* Geoseismological investigation of 26 January 2001 Bhuj earthquake Prabhas Pande Geological Survey of India Delineation of crustal and lithospheric structures below the Kachchh.. Prantik Mandal National Geophysical Research Institute (CSIR), Hyderabad, India Seismic source of the 2001 Bhuj earthquake.. J R Kayal Indian School of Mines, Dhanbad. Impact of the 2001 M 7.7 Bhuj earthquake on hazard estimates in the US.. Mark Petersen U.S. Geological Survey, Golden, CO, USA Targeting the future great earthquakes : Global monitoring and the 26 January 2001 Bhuj, India case Vladimir G. Kossobokov et al. International Institute of Earthquake Prediction Theory and Mathematical Geophysics, Relocation of aftershocks of the 2001 Bhuj earthquake. Jim Mori et al Disaster Prevention Research Institute, Kyoto University, Japan. Probabilistic assessment of earthquake hazards using method of moments in the Kutch Jayant N. Tripathi Department of Earth and Planetary Sciences, University of Allahabad Detection complex networks of Bhuj earthquake (2001) and aftershocks. MostafaAllameh-Zadeh Seismology Department, IIEES Ground deformation and liquefaction structures formed due to 2001 Kachchh earthquake R.D. Shah et al. M.G. Science Institute, Navrangpura, Ahmedabad Seismicity monitoring of Bhuj aftershocks Santosh Kumar et al. Institute of Seismological Research, Gandhinagar S2:Intraplate Seismicity 7 Session Chairman: O. P. Mishra Co-Chairman:Bijendra Singh Session Date: 23 rd January, 2011 Session Time: 14:00 17:00 S2_Kn1 Seismotectonics of Bhuj earthquake of 2001 based on gravity and magnetic signatures.. D. C. Mishra National Geophysical Research Institute (CSIR), Hyderabad 7 vi

17 S2_I1 S2_C1 S2_C2 S2_C3 S2_C4 S2_C5 S2_C6 S2_C7 S2_C8 S2_C9 S2_P1* S2_P2* S2_P3* Geodynamics of the Kachchh Basin: Gravity- Magnetic Perspective D.V. Chandrasekhar and B. Singh National Geophysical Research Institute (CSIR), Hyderabad ) Geodetic crustal strain patterns over the Satpura mountain belt. S. Mohanty Department of Applied Geology, Indian School of Mines, Dhanbad, India Mafic crust and earthquake activity in the high velocity Indian shield. O.P. Pandey National Geophysical Research Institute,Uppal Road, Hyderabad An intraplate earthquake and the study of ground response analysis.. H.S.Mandal Earthquake Risk Evaluation Centre, India Meteorological Department, New Delhi Study of the shallow seismic activity of offshore southern and eastern Sri Lanka Shantha S.N. Gamage and S.A.D.L.K. Suraweera Department of Physics, University of Sri Jayewardenepura, Sri Lanka Assessing the intraplate origin for subduction zone mega-thrust earthquake Prosanta K. Khan Department of Applied Geophysics, Indian School of Mines, Dhanbad Crustal strain pattern over a part of southern India and its implication for seismotectonics ArijitBarik and S. Mohanty Department of Applied Geology, Indian School of Mines, Dhanbad, India Intermittent micro-seismic activity in the vicinity of Nanded city of west central India Md. Babar Shaikh,Maharashtra Structural controls on the intraplate seismicity of the Kachchh region, India. SushmitaSinha and S. Mohanty Department of Applied Geology, Indian School of Mines, Dhanbad, India Improved Seismicity Trends in the Koyna-Warna Region through Earthquake Relocation using hypodd. G. Srijayanthi et al. National Geophysical Research Institute, Hyderabad Unusually large number of earthquake sequences in Saurashtra since B.K. Rastogi et al. Institute of Seismological Research, Gandhinagar Spatiotemporal complexity of intraplate seismicity: a reverie and its multifarious ArjunTiwari Applied Geophysics, Indian School of Mines Dhanbad New insight into crustal heterogeneity beneath the 2001 Bhuj earthquake A. P. Singh et al. Institute of Seismological Research (ISR), Raisan, Gandhinagar, Gujarat S3: Seismicity and Earthquake Source Processes 16 Session Chairman: J R Kayal Co-Chairman: Prantik Mandal Session Date: 23 rd January, 2011 Session Time: 14:00 17:00 S3_I1 Seismic hazard assessment for Karachi, Pakistan MonaLisa and 2M.Qasim Jan Department of Earth Sciences, Quaid-i-Azam University, Islamabad, Pakistan. 16 vii

18 S3_I2 S3_C1 S3_C2 S3_C3 S3_C4 S3_C5 S3_C6 S3_C7 S3_C8 S3_C9 An overview of the seismic activity and associated hazards in South-America. Omar J. Pérez, Carlos Rodríguezand José L. Alonso Simon Bolivar University, Dpt. Earth Sciences, Caracas, Venezuela A study of source parameters, site amplification functions and attenuation parameter Manisha, Dinesh Kumar and S.S. Teotia Department of Geophysics, Kurukshetra University Kurukshetra, India Source parameters and scaling relations for small earthquakes in Kumaon Himalaya K. Sivaram et al. National Geophysical Research Institute, Hyderabad India Apatial statistics: a technique to constrain earthquake cluster.. Basab Mukhopadhyay Geological Survey of India Estimation of seismic source parameters in northeast (NE) India from body wave spectra Alok Kumar Mohapatra and William Kumar Mohanty Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur Analysis of the seismic activity of el asnam region F.Bellalem et al. Seismological Dept.Survey.CRAAG.BP 63 Bouzareah Algiers-Algeria Stress pattern in the Kangra-Chamba region of Northwest Himalaya. Dilip Kr Yadav et al.. Wadia Institute of Himalayan Geology, Dehradun , India. Estimation of earthquake source parameters and site response.. Prantik Mandal and Utpal Dutta National Geophysical Research Institute (CSIR), Hyderabad, India Earthquake interevent time clustering inferred from mixed models. Talbi A. et al. Centre de Recherche en AstronomieAstrophysiqueetGéophysique, CRAAG, Algeria. Triggering is fine but what causes earthquakes in Koyna-Warna region? V.K. Gahalaut and Kalpna Gahalaut National Geophysical Research Institute, Uppal Road, Hyderabad S3_C10 Source characteristics of Delhi earthquake (ML:4.3) of 25th Nov., 2007 Rajesh Prakash, A. K. Shukla and R. K. Singh India Meteorological Department, New Delhi 23 S3_P1* S3_P2* S3_P3* S3_P4* Waveform inversion of local earthquakes using broadband data of Koyna. D. Shashidhar et al. National Geophysical Research Institute, Uppal Road, Hyderabad Remotely triggered seismicity due to the 2001 Bhuj earthquake G. Surve and G. Mohan Dr. K. S. Krishnan Geomagnetic Research Laboratory (I.I.G), Leelapur Road, Chamanganj, Allahabad Evidence for transverse tectonics in Sikkim Himalaya from seismicity. Pinki Hazarika et al. National Geophysical Research Institute, Uppal Road, Hyderabad Evidence for right lateral strike slip environment in Kutch rift... Ch. Nagabhushana Rao et al. Institute of Seismological Research, Raisan, Gandhinagar, Gujarat , India viii

19 S4 : Paleoseismology and Historical Seismology 26 Session Chairman: V C Thakur Co-Chairman: Javed Malik Session Date: 23 rd January, 2011 Session Time: 09:30 10:30 & 11:00-13:00 S4_Kn1 S4_I1 S4_C1 S4_C2 S4_C3 S4_C4 S4_P1* Luminescence dating in paleoseismology and neotectonics: an overview A.K. Singhvi et al. Physical Research Laboratory, Ahmedabad, India Active faults in Kachchh region and issue on the seismic hazard assessment M. Morino et al. OYO International Corporation; Partitioning of convergence in Northwest sub Himalaya... V.C. Thakur et al. Wadia Institute of Himalayan Geology, Dehradun , India. Paleoseismic investigations in the Kopili Lineament Zone, Northeast India. Devender Kumar et al. National Geophysical Research Institute, Uppal Road, Hyderabad Paleoseismology along an intraplate fault: Talas-Fergana, Tien-Shan mountains, central Asia. Derek Rust et al. School of Earth and Environmental Sciences, University of Portsmouth, UK. Active fault mapping using high resolution geophysical field investigation in Kachchh A. K. Gupta et al. Institute of Seismological Research, Gandhinagar, Gujarat, India Morphotectonic control on drainage network evolution in the Upper Narmada Valley Girish Ch. Kothyari and B. K. Rastogi Institute of Seismological Research, Raisan, Gandhinagar, Gujarat India S5: Earthquake Precursors and Prediction Studies 30 Session Chairman: B R Arora Co-Chairman: R K Chadha Session Date: 24 th January, 2011 Session Time: 08:30 10:30 &11:00-13:00 S5_I1 S5_I2 S5_C1 Changing Scenario of earthquake precursory research B. R. Arora Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun, India Monitoring well water level changes what did we learn from our experiences in India R K Chadha National Geophysical Research Institute, Hyderabad Soil-gas geochemistry for earthquake monitoring and fault studies in Taiwan. Vivek Walia et al. 1National Center for Research on Earthquake Engineering,Taiwan, S5_C2 Fractal correlation dimension analysis to identify precursory pattern prior to 15th July 2009 S.K. Mondal, R. Meena and and P. N. S. Roy Department of Applied Geophysics, Indian School of Mines, Dhanbad , Jharkhand, 32 S5_C3 S5_C4 Investigations of anomalous signals prior to large earthquakes. WenBin Shen et al. Department of Geophysics, School of Geodesy and Geomatics, Wuhan University, Chin Changes observed prior and after the Gujarat earthquake of 26 January.. Ramesh P. Singh and Waseem Mehdi School of Earth and Environmental Sciences,Chapman University,USA ix

20 S5_C5 S5_C6 S5_C7 S5_C8 S5_C9 S5_C10 S5_C11 S5_C12 S5_C13 S5_C14 S5_C15 S5_C16 Application of acoustic sounding in earthquake precursor detection lessons from Bhuj. H.N. Dutta and B.S. Gera Roorkee Engineering & Management Technology Institute, Shamli. Anomalous changes in groundwater and soil-gas radon concentrations.. R.C. Ramola and Sushil Kumar Wadia Institute of Himalaya Geology, Dehra,India Anomalous variations of fof2 during Bhuj earthquake of 26 January, 2001 O.P. Singh et al. Department of Physics, Faculty of Engineering & Technology, R.B.S. College, Signature of seismo-electromagnetic signals (ses) in prediction of earthquakes Vinod Kumar Kushwah Department of Physics, Hindustan College of Science & Technology, Farah, Mathura Precursory Earthquake Studies in Maharashtra, especially in Koyna Region Arun Bapat¹ and M.A.Ghatpande 2 1 1/11, Tara Residency, 20/2, Kothrud, Pune , 2 Formerly from MERI, Nashik Earthquake pre-cursory studies in Koyna-Warna region, India: some vital observations D.V. Reddy and P. Nagabhushanam National Geophysical Research Institute,Hyderabad Detection of possible precursors of the 2010 Chile earthquake using.. Jun Yi et al. Department of Geophysics, School of Geodesy and Geomatics, Wuhan University, China Seismic Acoustic Emission (SAE) as an earthquake precursor G. Suresh and R. S. Dattatrayam India Meteorological Department,, New Delhi Study of multi-parameter gas-geochemical precursor signals of a distant earthquake.. H. Chaudhuri et al. Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Kolkata, India. Predictability of valsad earthquake swarms Gujarat, India H.N.Srivastava, Formerly in India Meteorological Department Gujarat Engineering Research Institute,Vadodara The analysis of microseisms before the 2008 great Wenchuan earthquake. Xiao-GuangHao, Xiao-Gang Hu. Institute of Geodesy and Geophysics, ChineseAcademy of Sciences, China. Multi-parametric geophysical observations at Ghuttu, Garhwal Himalaya: Radon component V.M.Choubey Wadia Institute of Himalayan Geology S5_P1* Thermal and ionospheric anomalies associated with the Haiti earthquake of January 12, 2010 Suryanshu Choudhary, Shivalika Sarkar and A.K.Gwal Space Science Laboratory, Department of Physics 44 S5_P2* S5_P3* Earthquakes in UttranchalHimalaya, India Arun K Shandilya & AnuragShandilya Department of Applied Geology, Dr. Hari Singh Gour University, Sagar (M.P.) India Low field magnetic measurements: a modern tool for prediction of earthquake Dr Rajeev Vaghmare GRIIC, GERMI Gandhinagar x

21 S5_P4* S5_P5* Foreshock clustering as precursory pattern for the Kachchh earthquakes in Gujarat, India Sandeep Kumar Aggarwal et al Institute of Seismological Research, Village Raisan, Gandhinagar Status of superconducting gravimeter and MPGO network of Kachchh Arun Gupta, RashmiPradhan, M.S.B.S. Prasad and B.K.Rastogi Institute of Seismological Research, Raisan, Gandhinagar, Gujarat S6 : Seismic Wave propagation, Amplification and Basin Effect 47 Session Chairman: Praveen Malhotra Co-Chairman: MostafaAllameh-Zadeh Session Date: 24 th January, 2011 Session Time: 15:00 17:00 S6_C1 S6_C2 S6_C3 S6_C4 S6_C5 S6_C6 S6_P1* S6_P2* S6_P3* A possibility of site effects due to the past earthquakes at Anjar, Gujarat state, India. Fumio Kaneko et al. Oyo internation Corporation Determination of Site amplification in the Northern Iran from Inversion of Strong- Motion B. Hassani, H. Zafarani International Institute of Earthquake Engineering and Seismology, Iran. Estimation of dynamic properties of Lucknow soil T.G. Sitharam, S. M.Patil. Professor, Department of Civil Engineering, Indian Institute of Science, Bangalore, India Liquefaction susceptibility of lucknow soil T.G. Sitharam et al. Professor, Department of Civil Engineering, Indian Institute of Science, Bangalore, India. Site characterization: which dataset to use? Manish Shrikhande and SusantaBasu Department of Earthquake Engineering, Indian Institute of Technology Roorkee The ground effect of the Skopje 1963 earthquake. Apostol Poceski, R.Macedia Fac. of Civil Eng.Univ.Sent Cyril &Metodi, Skopje Attenuation of coda waves of local earthquakes in the Northeastern India Alok Kumar Mohapatra, William Kumar Mohanty Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur Spectral decay parameter (?) using the accelerograms of the earthquakes in Himalaya Renu Yadav, Kavita Rani, Gunjan Dhiman and Deepak Kumar Department of Geophysics, Kurukshetra University Kurukshetra,India Estimation of coda-q using a non-linear (Gauss-Newton) regression Savita Singh, Sumedha, Monika Wadhawan and Vandana Department of Geophysics, Kurukshetra University Kurukshetra, India S7 : Real Time Seismology, Loss Reduction and Early Warning 52 Session Chairman: R.S.Dattatrayam Co-Chairman: E. Hohnecker Session Date: 24 th January, 2011 Session Time: 11:00 13:00 S7_Kn1 Current trends in seismic instrumentation and earthquake monitoring in India R.S.Dattatrayam et al. India Meteorological Department, Ministry of Earth Sciences, Lodi Road, New Delhi 52 xi

22 S7_I1 S7_C1 S7_C2 S7_C3 S7_C4 S7_C5 S7_C6 S7_C7 EDIM earthquake disaster information system for the Marmara region, Turkey Wenzel F et al. Geophysical Institute, Karlsruher Institute of Technology (KIT), Seismic loss reduction/estimation technique for use in educational spaces Chandra Bhakuni QuakeSchool Consulting Pvt. Ltd., Navrangpura, Ahmedabad, Gujarat, India The seismic alert system of Mexico (SASMEX). Espinosa-Aranda J. M et al. Centro de Instrumentación y RegistroSímico, A. C., Mexico. Early warning system for transportation lines E. Hohnecker et al. Department of Railway Systems, Karlsruhe Institute of Technology, Germany. Seismo-tectonic interpretations for the Delhi region based on the data recorded at Delhi VivekMahadev and NeeluMathur Delhi Seismic Unit, Seismology Division, BARC, New Delhi Earthquake vulnerability assessment of Gujarat port sites viz-a-viz seismic disturbances Terala Srikanth et al. Earthquake Engineering Research Centre, IIIT Hyderabad, Gachibowli, Hyderabad, India. Performance analysis of mundra panipat pipeline crossing Kachhach mainland fault Vasudeo Govind Choudhary and Ramancharla Pradeep Kumar Earthquake Engineering Research Centre, IIIT Hyderabad, Gachibowli, Hyderabad, India. Rapid visual survey of existing buildings in Gandhidham and Adipur cities, Kachchh, Gujarat Terala Srikanth et al. Earthquake Engineering Research Centre, IIIT Hyderabad, Gachibowli, Hyderabad, India S8 : Earthquake Ground Motion and Damaging Earthquakes 58 Session Chairman: Kojiro Irikura Co-Chairman: Sumer Chopra Session Date: 24 th January, 2011 Session Time: 08:30 10:30 S8_I1 S8_C1 S8_C2 S8_C3 S8_C4 The great Sumatra earthquakes: Results from recent marine studies Satish C. Singh. Institut de Physique du Globe de Paris, France and University of Cambridge, UK Estimation of H/V ratio in different sites in northern Algeria with aftershock sequences. M.Mobarki et al. Seismological Dept,Algeria Ground motion parameters of Shillong plateau: One of the most seismically active zones... SaurabhBaruah et al. Geoscience Division, North-East Institute of Science and Technology (CSIR), Assam, India Characterization of seismic regime in NW Himalaya: Persistent and high seismicity in. Naresh Kumar et al. Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun, India Strong ground motion simulation of the 2001/01/26 Bhuj, India earthquake Tao-Ming Chang National Center for Earthquake Engineering Research, Taipei, Taiwan xii

23 S8_C5 S8_C6 S8_C7 S8_P1* S8_P2* Recipe for predicting strong ground motions for inland mega fault earthquakes Kojiro IRIKURA and Susumu KRAHASHI Aichi Institute of Technology & Kyoto University, Toyota, Aichi, Japan Estimation of damage to various types of buildings in Gujarat from a future large earthquake Sumer Chopra, Dinesh Kumar and B.K.Rastogi Institute of Seismological Research, Gandhinagar Strong motion simulation of great earthquake in the central seismic gap Kapil Mohan and A. Joshi Institute of Seismological Research, Gandhinagar, Gujarat(India) Attenuation relations for the Kumaon and Garhwal Himalaya, Uttarakhand, India A.Joshi et al. Department of Earth Science, Indian Institute of Technology Roorkee, Roorkee, India. Prediction of strong ground motion in the coastal and economically important regions... Kapil Mohan Institute of Seismological Research, Gandhinagar, Gujarat (India) S9: Seismic Hazard Assessment / Microzonation 64 Session Chairman: A. Peresan Co-Chairman 1: T G Sitharam Co-Chairman 2: Imtiyaz Parvez Session Date: 23 rd January, 2011 Session Time: 14:00 17:00 S9_I1 S9_I2 S9_I3 S9_I4 S9_I5 S9_I6 S9_I7 S9_C1 Seismic hazard assessment for Gandhidham; Kutch; Gujarat Fumio Kaneko et al. OYO International Corporation Seismic hazard assessment based on unified scaling law for earthquakes Anastasia K. Nekrasova and Vladimir G. Kossobokov International Institute of Earthquake Prediction Theory and Mathematical Geophysics Neo-deterministic seismic hazard techniques contributions to the alternative. Kouteva M et al. NIGGG-BAS, Sofia, Bulgaria Neo-deterministic seismic hazard and pattern recognition techniques Peresan et al. Department of Earth Sciences, University of Trieste,Triest., Ground motion at bedrock level in Delhi city from different earthquake scenarios Imtiyaz A Parvez et al. (CMMACS), NAL Belur Campus, Bangalore, India Probabilistic seismic hazard macrozonation of India Prof. T.G. Sitharam, Mr.SreevalsaKolathayar and Dr. K.S. Vipin Department of Civil Engineering, Indian Institute of Science, Bangalore Study of the local site effects on seismic hazard using deterministic and probabilistic approaches: A case. Prof. T.G. Sitharam, Mr. Naveen James, and Dr. K.S Vipin Department of Civil Engineering, Indian Institute of Science Seismic hazard deaggregation in terms of magnitude, distance and azimuth M. Hamdache et al. Departement Étudeset Surveillance Sismique, CRAAG, Algiers xiii

24 S9_C2 S9_C3 S9_C4 S9_C5 S9_C6 S9_C7 S9_C8 S9_C9 S9_C10 S9_P1* S9_P2* S9_P3* S9_P4* S9_P5* S9_P6* Determination site effect of Zarqa City-Jordan based on microtremors field measurements: A microzonation study Waleed Eid Olimat Natural Resources Authority (NRA), Jordan Seismological Observatory (JSO),Jordan. Probabilistic seismic hazard analysis for mitigating societal risk from earthquakes Dr. Praveen K. Malhotra, P.E. StrongMotions Inc., Sharon, MA, USA Influence of source and epicentral distance on local seismic response in Kolkata city, India. William K. Mohanty et al. Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur Neo-deterministic and probabilistic seismic hazard assessments E. Zuccolo et al. European Centre for Training and Research in Earthquake Engineering,Italy. Evaluation of site classification for soils in Lucknow urban centre Abhishek Kumar et al. Department of Civil Engineering, Indian Institute of Science, Bangalore,India. Site response studies in the Andaman and Nicobar islands K Sushini et al. National Geophysical Research Institute,Uppal Road, Hyderabad Analysis of embedded pipeline induced by earthquake excitation under. Goktepe F et al. Department of Civil Engineering, Sakarya University, Sakarya, Turkey Seismic hazard assessment of Gujarat. K. S. Vipin et al. Department of Civil Engineering, Indian Institute of Science (IISc), Bangalore Earthquake hazard assessment for public safety Lalliana Mualchin Retired Chief Seismologist, Office of Earthquake Engineering, California Dept. of Transportion, Sacramento, California and Seismic Consultant to the Govt. of Mizoram, India, Disaster Mangement & Rehabilitation Dept., Govt. of Mizoram, Aizawl) Geo-informatics based conceptualization of earthquake disaster management system Ajeet P. Pandey, R.K. Singh and A.K. Shukla Earthquake Risk Evaluation Center, India Meteorological Department, New Delhi Probability of occurrence of largest earthquakes in Jharkhand and nearby region.. AkashAdwani et al. Dept. of Applied Geophysics, Indian School of Mines, Dhanbad (India). Preliminary site characterization through integration of geophysical and geotechnical data at GIFT B.K. Rastogi et al. Institute of Seismological Research (ISR), Raisan, Gandhinagar, Gujarat, India Preliminary site characterization through integration of geophysical and geotechnical data at Dholera. B.K. Rastogi et al. Institute of Seismological Research (ISR), Raisan, Gandhinagar, Gujarat, India Estimation of liquefaction potential of Dholera region based on SPT N-values Sarda Maibam et al. Institute of Seismological Research, Raisan Village, Gandhinagar Vs30 and site amplification studies in Dholera SIR Region, Gujarat, India B. Sairam et al. Institute of Seismological Research, Raisan, Gandhinagar xiv

25 S10 : Tectonics and Crustal Movements 78 Session Chairman: H N Srivastava Co-Chairman: Y S Kim Session Date: 24 th January, 2011 Session Time: 15:00 17:00 S10_I1 S10_I2 S10_I3 S10_C1 S10_C2 S10_C3 S10_C4 S10_P1* Seismotectonics and velocity structure of the Kumaon - Garhwal Himalaya P. Mahesh et al. National Geophysical Research Institute (CSIR), Hyderabad, India New evidence of the involvement of the low density fluid phase in the deep crust seismicity M.V.Rodkin International Institute of Earthquake Prediction Theory and Mathematical Geophysics,Russia, Crustal configuration and seismo-tectonics of the Kutch rift basin from analysis Mita Rajaram and S.P.Anand Indian Institute of Geomagnetism, NewPanvel(W), Navi Mumbai. Seismotectonic studies of kachchh basin using gravity surveys after 2001 Bhuj earthquake Rashmi Pradhan et al. Institute of Seismological Research, Gandhinagar About the geophysical studies are being carryout by WIHG in the NW Himalaya. Sushil Kumar Wadia Institute of Himalaya Geology, Dehra Dun, India Fractal dimension and b-value mapping in NW Himalaya and adjoining regions. Sushil Kumar Wadia Institute of Himalaya Geology, Dehra Dun, India Stress pulse migration by viscoelastic process for long - distance delayed triggering of.. B.K. Rastogi Institute of Seismological Research, Gandhinagar, India Active deformation and lithotectonic model of Saurashtra Horst, Gujarat, India Girish Ch. Kothyari et al. Institute of Seismological Research, Gandhinagar, Gujarat, India S11 : Earth s interior, structure & dynamics 83 Session Chairman: M.Ravi Kumar Co-Chairman:WenBin Shen Session Date: 24 th January, 2011 Session Time: 08:30 10:30 S11_C1 S11_C2 S11_C3 Spatial distribution of scatterers in the crust of Kachchh region, Western India by inversion analysis of coda B. Sharma et al. Institute of Seismological Research, Raisan, Gandhinagar, India Moho depth variation in the Shillong-Mikir hills plateau in North Eastern region of India SaurabhBaruah and Dipok K. Bora Geoscience Division, CSIR North-East Institute of Science and Technology Seismic signatures of volcanism in the upper mantle beneath NW DVP G. Mohan Department of Earth Sciences, Indian Institute of Technology Bombay,Powai, Mumbai xv

26 S11_C4 S11_C5 S11_C6 S11_C7 Crustal structure and upper mantle deformation in eastern Himalayan syntaxis DevajitHazarika, B.R. Arora Wadia Institute of Himalayan Geology,Dehradun, India The signal of transition-zone anisotropy in the normal mode coupling. Xiao-gang HU, Xiao-guangHao Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics. Surface wave tomography across the Indian shield, Indo-Gangetic plains and the Himalayan. N. Purnachandra Rao et al. National Geophysical Research Institute, Uppal Road, Hyderabad Anisotropy of the Indian crust from splitting of Ps phases from the Moho Narendra Kumar et al. NGRI, Hyderabad S11_P1* A comparative study on seismic wave attenuation characteristics of Koyna, Chamoli And Gujarat regions Babita Sharma et al. Institute of Seismological Research, Raisan, Gandhinagar, India. S11_P2* Inversion of seismic intensity data for the determination of three-dimensional attenuation structures. Babita Sharma et al. Institute of Seismological Research, Gandhinagar S11_P3* S11_P4* Seismic evidences for underplating and uplifted crust beneath the Northwestern deccan volcanic province. K. Madhusudana Rao et al. Institute of Seismological Research, India. Shear wave splitting beneath the northwestern deccan volcanic province... K. Madhusudana Rao et al. Institute of Seismological Research, India S11_P5* Evaluation of the crustal structure of the Indus Block up to Saurashtra using GA inversion Vishwa Joshi et al. ISR, Gandhinagar. S11_P6* Shield like lithosphere of the lower Indus basin evaluated from observations of surface wave dispersion. Mukesh Chauhan et al. Institute of Seismological Research, Raisan, Gandhinagar, India S12: Remote Sensing, GPS & InSAR 91 Session Chairman: V.K.Gahalaut Co-Chairman: Mita Rajaram Session Date: 23 rd January, 2011 Session Time: 11:00 13:00 S12_I1 S12_C1 Weak mantle lithosphere in Kachchh, India probed by GPS... D. V. Chandrasekhar and Roland Bürgmann National Geophysical Research Institute (CSIR), Hyderabad, India SAR Interferometry detects post-seismic ground deformations related with 2001 Bhuj earthquake. Arun K. Saraf Department of Earth Sciences,Indian Institute of Technology Roorkee, ROORKEE, INDIA xvi

27 S12_C2 S12_C3 S12_C4 S12_C5 S12_C6 S12_P1* Ten years of GPS observations after 2001 Bhuj earthquake C.D. Reddy et al. Indian Institute of Geomagnetism, New Panvel, Navimumbai, India. Studies on seismic behaviour and associated topographic changes in NE India based. R. K. Sukhtankar et al. Department of Atmospheric and Space Sciences, Pune University, Pune Crustal deformation mapping in Kachchh, India using InSAR and GPS: Initial results K. M. Sreejith et al. Geosciences Division, Marine,Space Applications Centre (ISRO), Ahmedabad The Tehri Dam, Uttarakhand: crustal strain and implications in case of reservoir induced. Swapnamita C. Vaideswaran and Ajay Paul Wadia Institute of Himalayan Geology, Dehradun Satellite altimeter derived geoid / gravity and the lithospheric density anomaly Rajesh S et al. Geophysics Group, WadiaInsitute of Himalayan Geology, Dehradun Post-seismic deformation associated with the 2001 Bhuj earthquake Pallabee Choudhury et al. Institute of Seismological Research, Raisan, Gandhinagar S13: Exploration for Oil and Crustal Structure 96 Session Chairman: S.K.Biswas Co-Chairman: Satish Singh Session Date: 24 th January, 2011 Session Time: 15:00 17:00 S13_I1 S13_I2 S13_I3 S13_C1 S13_C2 S13_P1* S13_P2* S13_P3* On-land Kutch basin and its basement configuration from seismic refraction studies.. B. Rajendra Prasad Emeritus Scientist, (National Geophysical Research Institute, Uppal Road, Hyderabad, India.) Integration of geophysical data for exploration of hydrocarbons - GIS application T. Harinarayana et al. NGRI, Uppal Road, Hyderabad, India Impact of tectonics, sedimentation process and evolving trap style in Andaman island etc.. Sadip k Roy, IIT,Bombay Geophysical Investigations of the Gulf of Kachchh, Northwest India. D. Gopala Rao and N. Mahendar Geology Department, Osmania University, Hyderabad, India 2D-geoelectric subsurface structure in the surroundings of the epicenter zone of Kapil Mohan et al. Institute of Seismological Research, Raisan, Gandhinagar, Gujarat, India Identification of shallow geological features in the Wagad area (Kachchh) using 2D electrical survey Kapil Mohan et al. Institute of Seismological Research, Raisan, Gandhinagar, Gujarat (India) 2D electrical imaging survey to identify the shallow subsurface layer in the Gujarat international. Kapil Mohan et al. Institute of Seismological Research, Raisan, Gandhinagar, Gujarat (India) Passive Seismic Imaging of Petroleum Reservoir Mr.Sunjay, Exploration Geophysics,BHU, Varanasi,India xvii

28 S14: Ground Response Studies for Nuclear Power Plants 101 Session Chairman: A.G. Chhatre Co-Chairman: CVR Murty Session Date: 23 rd January, 2011 Session Time: 11:00-13:00 S14_I1 S14_I2 S14_I3 S14_I4 S14_I5 S14_C1 S14_C2 S14_P1* S14_P2* S14_P3* Near-field ground motion simulation for the 26th January 2001 Gujarat earthquake STG Raghukanth and B. Bhanu Teja Dept. of Civil Engineering, IIT Madras Displacement-based Design of Structures: a consistent framework of limiting-strain based design method C. V. R. Murty Department of Civil Engineering, Indian Institute of Technology Madras,Chennai Seismic Design of Bridges for Displacement Loading Rupen Goswami Department of Civil Engineering,Indian Institute of Technology Madras Earthquake Experience based performance of civil structures, piping systems, cable trays, ducting and mechanical, electrical, instrumentation & control equipment from industries in India Faisal Dastageer et. al NPCIL, Mumbai Seismic Analysis of a typical Nuclear Power Plant structure Apurba Mondal et. al Nuclear Power Corporation of India Ltd., Mumbai, India Design of distribution systems, viz., piping, cable trays and ducting. Faisal Dastageer et al. NPCIL, Mumbai Earthquake ground motion generation for nuclear power plant. Faisal Dastageer et al. NPCIL, Mumbai Estimation of spectral decay parameter kappa, seismic moment, stress drop, source dimension.. Santosh Kumar et al. Institute of Seismological Research, Gandhinagar Seismotectonic study to characterize the seismic sources in Gulf of Khambhat and prediction of strong Sandeep Kumar Aggarwal et al. Institute of Seismological Research, Gandhinagar. Site characterization using Vs30 and site amplification in Gujarat, India B. Sairam et al. Institute of Seismological Research, Raisan,Gandhinagar S15: Tsunami Modeling 108 Session Chairman: V.P.Dimri Co-Chairman: A. Buchmann Session Date: 24 th January, 2011 Session Time: 11:00 13:00 S15_C1 Hydrodynamic modelling of 2004 Indonesian and 1945 Macran Tsunamis. R. Rajaraman and S. Joseph Winston Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, INDIA. 108 xviii

29 S15_C2 Tsunami assessment of Indian nuclear coastal sites for Sumatra 2004 and Makran 1945 Tsunami events. R. K. Singh, P Sasidhar Reactor Safety Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India. 108 S15_C3 S15_C4 S15_P1* Development of paleo-tsunami database and hazard assessment for Indian subcontinent Akhilesh K. Verma and William K. Mohanty Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, India. Tsunami effect On Porbandar, Western Gujarat coast V. M. Patel et al. Ganpat University, GanpatVidyanagar, Mehsana , Gujarat, India. Numerical modeling of Arabian Sea tsunami propagation and its effect on the Gujarat A. P. Singh and B. K. Rastogi Institute of seismological research (ISR), Raisan, Gandhinagar, Gujarat (India) S16: IGCP Session on Archeoseismology 112 Session Chairman: Javed Malik Co-Chairman: M Kazmer Session Date: 22 nd January, 2011&23 rd January, 2011 Session Time: 14:00 17:00 &9:30-10:30 S16_Kn1 Archaeoseismology and the role of tectonics in the demise of the Indus Valley Civilization PradeepTalwani, Dept. of Earth and Ocean Sciences, University of South Carolina, Columbia, SC, USA. 112 S16_I1 S16_C1 S16_C2 S16_C3 S16_C4 S16_C5 S16_C6 Major Earthquake Occurrences in Archaeological Strata of Harappan Settlement at Dholavira (Kachchh, Gujarat) Ravindra Singh Bisht Former Joint Director General, Archaeological Survey of India, Ghaziabad Archaeological evidences for a 12th -14th century earthquake at Ahichhatra, Barreilly (U.P.), India Bhuvan Vikrama et al. Archaeologist, Archaeological Survey of India, Agra. Active fault influence on the evolution of landscape and drainage. Javed N. Malik Department of Civil Engineering, Indian Institute of Technology Kanpur,Uttar Pradesh, India. Signatures of active faulting in Southern peninsular India. Biju John et al. National Institute of Rock Mechanics, Kolar Gold Fields, India Macroseismic intensity assessment of 1885 AD historical earthquake of NW Kashmir Himalaya.. Bashir Ahmad et al. Department of Education, J&K, Srinagar, India Fault segmentation and propagation characteristics based on rupture patterns Jin-Hyuck Choi et al. GSGR, Dept. of Earth Environmental Sciences, Pukyong National University, Busan, Korea Preliminary study on active faults around Mandi region, NW Himalaya, India Javed N. Malik and Santiswarup Sahoo Department of Civil Engineering, Indian Institute of Technology, Kanpur, India xix

30 S16_C7 S16_C8 Archaeology of earthquakes at Mahasthanghar (Province of Bogra, Bangladesh) Bruno Helly et al. Directeur de recherche au CNRS (émérite), Maison de Archeoseismology of the A.D earthquake in Chiang Mai, northern Thailand. Miklos Kazmer and Kamol Sanittham Department of Palaeontology, Eotvos University, Hungary S16_C9 Paleoseismological analysis in north of Dushanbeh, Tajikistan (June 2010) H. Nazari et al. Geological survey of Iran, Seismotectonic group, Tehran, Iran S16_C10 Archaeo seismological approach based on stone heritages in Gyeongju, SE Korea. M. Lee and Y.-S. Kim Dept. of Geosciences, Pukyong National University, Busan, Korea S16_C11 S16_C12 Discover and the characteristic initially search of Gaixiaruins's nature distortion Vestige, Guzhen County et al. Seismological Administration of Anhui Province,Hefei,Anhui P.R.China Paleo-earthquake evidence from archaeological site in mesoseismal zone of 1819 Allah Bund event, Great Rann of Kachchh, Gujarat, Western India Malik J N et al. Department of Civil Engineering, Indian Institute of Technology Kanpur Miscellaneous 121 M_P1* M_P2* Specific yield-water level fluctuation method an effective tool for quantitative evaluation of groundwater resource a case study Syed Zaheer Hasan and M. Yusuf Farooqui GERMI, Gandhinagar and GSPC Gandhinagar Environmental studies using Electrical Resistivity Method Sunita Devi & Rupal Malik Institute of Seismological Research, Gandhinagar * Poster sessions have been scheduled at 17:00 hrs on 21 st January and at 18:30 hrs on 22 nd January. xx

31 S1: Bhuj Earthquake and Aftershocks Conveners : B.K. Rastogi, Prabhas Pande and Jim Mori THEME The 2001 M7.7 Bhuj earthquake is a rare great Stable Continental Region (SCR) earthquake studied through modern era seismographs. The well-determined mechanism indicated clear reverse faulting along a steep fault and inversion of tectonics from tensile stress (normal faulting) in the rift valley environment to compressive stress (thrusting) regime now. The rupture details have also been worked out. Over 10,000 aftershocks of M 1-5 have been precisely located and well-studied by modern era local seismograph network. Seismological studies include PS, Q and b-value tomography, Crustal structure, through travel time, surface-wave dispersion and Receiver Transfer Function, anisotropy study through shear-wave splitting, Geophysical surveys have established details of crustal structure besides sediment thickness and basement configuration. All these studies have given new insights to the understanding of seismogenesis of least understood SCR earthquakes. Papers are invited on the study of Bhuj earthquake and aftershocks and similar earthquake in other SCR regions as a comparative study. S1_Keynote-1 Geoseismological Investigation of 26 January 2001 Bhuj Earthquake Prabhas Pande (Geological Survey of India, JN Road, Kolkata, prabhas.pande@gsi.gov.in) Of the intraplate seismic events, the 26 January 2001 Bhuj earthquake will be remembered as one of the deadliest, in which 13,805 human lives were lost, 1.77 lakh injured and a total of 1,205,198 houses fully or partly damaged in 16 districts of Gujarat state with an estimated overall loss of Rs. 28,423 crore. The brunt of the calamity was borne by five districts, namely Kachchh, Ahmadabad, Rajkot, Jamnagar and Surendranagar, where 99% of the total casualties and damage occurred. In the neighbouring parts of Sindhh Province of Pakistan, 40 human casualties were reported, whereas some buildings cracked in Karachi city as well. In the Kachchh District, the telecommunication links and power supply remained totally disrupted, road and rail links partially impaired and water supply snapped at many places. The Bhuj airbase had also to be closed for some time due to damage to the infrastructure. The macroseismic survey carried out by the Geological Survey of India in an area as large as 1.2 million sq km indicated the epicentral intensity as X on the MSK scale, that occupied an area of 780 sq km. Apart from damage to civil structures, the 26 January earthquake induced conspicuous terrain deformation January, 2011 in the form of liquefaction features, structural ground deformation and low order slope failures that were mainly prevalent within the higher intensity isoseists. Liquefaction occurred in an area of about 50,000 sq km. The extensive plains of Rann of Kachchh, the marshy tracts of Little Rann and the shallow groundwater table zones of Banni Land provided the most conducive geotechnical environments for the development of seismites. The liquefaction activity was profuse in seismic intensity zones X and IX, widespread in intensity VIII, subdued in intensity VII and stray in intensity VI. The common forms were sand blows/boils, ground fissures, craters, lateral spreading and slumping. Ground deformation of tectonic origin was witnessed within the epicentral tract. Such features, though much less subdued in comparison with the 1819 earthquake, occurred along the Kachchh Mainland fault (KMF) and a transverse lineament, referred to as Manfara-Kharoi fault. The manifestations were in the form of fractures, displacement of strata, linear subsidence, upheaval, formation of micro-basins/ micro ridges, ripping off of rock surface and, at places, violent forms of liquefaction. The localities, where the coseismic deformational features were studied by the author included Bodhormora, Sikra, Vondh, Chobari, Manfara and Kharoi. The studies and documentation of 2001 Bhuj earthquake has brought to light many significant aspects that may contribute to the understanding of 1

32 the seismotectonic behaviour and seismic hazard potential of the dynamic landmass of Kachchh apart from providing an insight into the science of earthquakes. The event has demonstrated in no uncertain terms the role of local geology in influencing the ground motion characteristics and, therefore, the hazard estimation. The devastation caused by the earthquake has sent a strong message across various sections of the stakeholders that there is an urgent need to comprehend the seismic behavior of various tectonic domains of India and formulate mitigation plans in accordance. S1_Keynote-2 Delineation of crustal and lithospheric structure below the Kachchh rift zone: A probable model for the generation of aftershock activity for last 10 years Prantik Mandal (National Geophysical Research Institute (CSIR), Hyderabad , India, prantik_2k@hotmail.com) Large intraplate continental earthquakes like the New Madrid (Mw 8.0) and the 2001 Bhuj (Mw7.7) were highly destructive because they occurred in strong crust, but the mechanisms underlying their seismogenesis are not understood. Here we show, using local earthquake velocity tomography, and inversion of P-receiver functions that the crust and uppermost mantle beneath the 2001 Bhuj earthquake region of western India is far more complex than hitherto known through previous studies. A new image of the crust and underlying mantle lithosphere indicates the presence of a 18- km thick high velocity (Vp: km/s) differentiated crustal and mantle magmatic layer above a hot and thin lithosphere (only 70 km) in the epicentral region of 2001 Bhuj earthquake. This magmatic layer begins at the depth of 24 km and continues down to 42 km depth. Below this region, brittle-ductile transition reaches as deep as the Moho (~34 km) due to the possible presence of olivine rich mafic magma. Our 1-D velocity structure reveals a basaltic magmatic eclogitic layer at sub-lithospheric levels. This study also delineates an updoming of Moho (~ 3-7 km) as well as asthenosphere (~ 6-12 km) below the Kachchh rift zone relative to surrounding areas, suggesting the presence of patches of partial melts below the lithosphereasthenosphere boundary. Restructuring of this warm and thin lithosphere may have been caused due to rifting (at 184 and 88 m.y. ago) and tholeiitic and alkalic volcanism related to the Deccan Traps K/T boundary event (at 65 m.y. ago). Recent study of isotopic ratios proposed that the alkalic basalts found in Kachchh are generated from a CO 2 rich lherzolite partial melts in the asthenosphere that ascended along deep lithospheric rift faults into the lithosphere. It appears that such kind of crust-mantle structure, deepening of brittle-ductile transition and a high input of volatiles containing CO 2 emanating from mantle control the generation of aftershock activity in the Kachchh rift zone for last 10 years. S1_Keynote-3 Seismic Source of the 2001 Bhuj Earthquake: A Review of Seismic Tomography, Fractal Dimension and b-value Mapping J R Kayal (Indian School of Mines, Dhanbad , jr.kayal@gmail.com) More than 800 aftershocks (M > 2.0) were recorded during the first two months after the January 26, 2001 Bhuj earthquake (Mw 7.7) in western part of the peninsular Indian shield. About 500 aftershocks were relocated by simultaneous inversion using the Local Earthquake Tomography (LET) method (Kayal et al., 2002, GRL). Most of the aftershocks occurred in a V- shaped area of 70 x 35 sq km; the maximum activity was observed at a depth range of km. A bimodal distribution of aftershocks indicated that the main shock rupture propagated both in the upward and downward directions, but the rupture did not reach the surface. 3D-velocity velocity structures imaged two fault zones with lower velocity, and a high velocity structure with higher Vp/Vs at the fault ends, at the main shock source depth. Aftershock trends and fault plane solutions are comparable with these two fault/rupture zones at depth. Using the relocated events, b-value and fractal correlation dimension (Dc) mapping are studied (Das and Kayal, 2010, BSSA, submitted). The surface map of b-value as well as an E-W cross section reveals two distinct NE and NW trending tectonic arms of the V-shape aftershock zone. A N-S cross section, on the other hand, clearly imaged January, 2011

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