EARTHQUAKE RELATED PROJECTS IN NIED, JAPAN. Yoshimitsu Okada NIED (National Research Institute for Earth Science and Disaster Prevention), Japan
|
|
- Todd Lane
- 5 years ago
- Views:
Transcription
1 OECD/NEA WS 1/8 EARTHQUAKE RELATED PROJECTS IN NIED, JAPAN Yoshimitsu Okada NIED (National Research Institute for Earth Science and Disaster Prevention), Japan Abstract Earthquake related projects in NIED were originated from the work to develop a very deep borehole seismic observatories surrounding Tokyo Metropolis. After the occurrence of Kobe earthquake in 1995, NIED has started two big projects. One is to construct 3-D Full Scale Earthquake Testing Facility for earthquake engineering study and the other is to construct nation-wide seismic network of high-sensitivity, strong-motion, and broadband seismographs. At the same time, the projects aiming direct contributions to the society were newly started such as the study to develop real-time seismic information system and the research on mapping of predicted strong-motion. These projects are conducted in NIED with a close cooperation each other. Overview of earthquake related projects in NIED Since its establishment in 1963, National Research Institute for Earth Science and Disaster Prevention (NIED) has conducted earthquake related projects as one of the most important tasks of the institute. At the first stage, main efforts were concentrated to the Kanto and Tokai regions, central Japan. The Kanto-Tokai area has specialty both in the scientific and social aspects. According to the collision of the Izu Peninsula against continental plate, Kanto and Tokai regions are threatened by the situation that giant trench-type earthquakes are not generated at offshore but right under our foots. Moreover, both regions are densely populated and are bearing quite important roles in politics and economics of Japan. In 1969, NIED started a project, Research on Seismic Activities in the Southern Metropolitan Area,
2 OECD/NEA WS 2/8 in which a 3,000m-class deep borehole seismic observation system was developed to realize highly sensitive microearthquake observation in a densely populated urban area (Takahashi, 1982). The system was installed at three sites surrounding Tokyo, Iwatsuki (3,510m), Shimohsa (2,330m) and Fuchu (2,781m). As its background, the importance of Tokyo observation had been emphasized in the National Earthquake Prediction Program which wad started in 1965 and southern Kanto region was designated as the Area of Intensified Observation in 1970 by the Coordinating Committee for Earthquake Prediction. Later, by close-up of the imminence of Tokai earthquake, Tokai region was also designated as the Area of Intensified Observation in Further a part of Kanto-Tokai area was designated as the Area under Intensified Measures against Earthquake Disaster in Corresponding to such an environment, NIED started another project, Research on Crustal Activities in the Kanto-Tokai Area, in 1978 in which a dense shallow borehole network for microearthquake and crustal tilt observation was constructed covering the both of Kanto and Tokai regions (Hamada et al., 1985). In this project, the first fixed-point GPS network in the world was also constructed in 1988 (Shimada et al., 1990). These two projects have produced many outputs such as delineation of the plate configuration in this complex area (Kasahara, 1985; Ishida, 1992) and the findings of a rocked zone in Tokai area and its seismic quiescence in recent years (Matsumura, 1997). GPS observation provided important data to interpret the earthquake swarm activity and the submarine eruption at eastern off Izu Peninsula in 1989 (Okada and Yamamoto, 1991). In 2001, these two projects were unified to a project, Research on Seismic Activities in the Kanto-Tokai Area, and further investigation is expected for forthcoming Tokai earthquake and the earthquake just beneath Tokyo metropolitan area. In 1978, at the same time with the Kanto-Tokai project, another project, Research on Mechanism of Earthquake Generation, was also started to investigate the basics of inland earthquakes through in-situ stress measurement by hydro-fracturing method (Tsukahara and Ikeda, 1987). Later, another project for basic study, Fundamental Research on Earthquakes and Earth s Interior Anomaly (FREESIA), was added in 1994 (Fukuyama et al., 1996). The aim of this project was to investigate the source process using an observation network of broadband seismographs. The occurrence of the Kobe earthquake of 1995 affected so much the trend of earthquake related projects in NIED. Several big projects listed below were newly started under the policy of the Headquarter for Earthquake Research Promotion, which was established by Japanese Government after the Kobe earthquake. (1) 3-D Full Scale Earthquake Testing Facility (E-defense) In order to develop safety building structure, the 3-D large shaking table (E-defense) is under construction and related research projects were started.
3 OECD/NEA WS 3/8 (2) Research on Earthquake Disaster Mitigation (EDM) Aiming for integration of science, technology and social engineering studies, a research team for earthquake disaster mitigation, EDM, was transferred to NIED in 2001 from RIKEN. (3) Operation of seismic networks (Hi-net, F-net, K-NET and KiK-net) A large number of seismographs were newly installed covering the whole of Japan. The data are merged to those from existing networks and are provided to the public under a fully open policy. (4) Development of real-time issue and distribution system of earthquake information As a way to utilize seismic data for hazard mitigation, a real-time earthquake information system is developed to issue quick alarms before the arrival of S-wave. (5) Research on the mapping of predicted strong-motion To complete a nation-wide probable shaking map and the one estimated by scenario earthquakes, various techniques are developed to estimate strong motions and represent them on a map. These projects are closely related each other. For example, soil condition data or velocity logging data obtained at boreholes as a by-product of the project (3) become quite useful information to estimate surface strong motions in the project (5). In the following sections we introduce two biggest projects in NIED, (1) E-defense and (3) Operation of seismic networks. Figure 1. On-going earthquake related projects in NIED Experimental study O bservational study Social study Earth Science Disaster Prevention M echanism of Earthquake Generation E-defense Kanto-Tokai Real-time M apping Predicted Strongmotion EDM Operation ofseism ic Network Construction of 3-D Full Scale Earthquake Testing Facility (E-defense) Learning from the lessons of the Kobe earthquake, NIED planned to construct the world s largest three-dimensional (3-D) full-scale shaking table in Miki city near Kobe which is now nicknamed as
4 OECD/NEA WS 4/8 E-Defense. It will be able to simulate the processes of destruction of structures under the condition of real strong earthquake motions. By testing real-sized structures to collapse it will facilitate to calibrate and validate our earthquake resistant design capabilities. The size of E-Defense is 20m x 15m and its basic performances are maximum loading capacity of 1,200 tons, maximum velocity of 200 cm/s and maximum displacement of 2m p-p for horizontal excitation and maximum velocity of 70 cm/s, maximum displacement of 1m p-p for vertical excitation to realize destructive ground motion. The construction work of E-Defense has begun at Miki City in early 2000, and will be completed at the beginning of The manufacturing, assembling and installing of actuators, oil-pressure supply system and other major parts of shaking table are borne by the Mitsubishi Heavy Industry. Figure 2. Concept of E-defense Concerning the utilization of E-Defense, there are many subjects which NIED should make clear before the operation of the facility becomes possible. In order to solve these subjects, NIED is actively investigating the practical research themes as follow, 1) Establishment of utilization and wide area network systems, 2) Development of 3-D ground motion database for input motion of E-Defense and a simulation system for the 3-D shaking table, and 3) Test and analysis of reinforced concrete structures, soil-pile-structure systems and conventional wooden structures for using E-Defense. Further, many domestic research centers, universities, independent administrative institutions, private companies are involved in a collaborative research. E-Defense is a very large scale and high performance testing facility in the world and should be operated as the facility of internationally common use. For the international collaboration and the dissemination of the research results, E-Defense Network ( ED-net ) will be also constructed until the
5 OECD/NEA WS 5/8 completion of E-Defense. ED-net will connect major earthquake engineering research organizations in the world through a high performance Internet line. We hope that E-Defense and ED-net will be situated to one of the cooperative research organization for the earthquake disaster mitigation in the world. Figure 3. Actuators of E-defense (at Miki City) Construction of nation-wide seismic networks (Hi-net, F-net, K-NET and KiK-net) After the Kobe earthquake, we learned that a systematic observation system of the ground motion is lacked in Japan. NIED planned to install 1,000 strong-motion seismographs covering the whole of Japan (Kinoshita, 1998). The network is called K-NET (Kyoshin network), where Kyoshin is a Japanese word to mean strong-motion. At the same time, a new national plan called KIBAN project has started to drastically improve seismic observation system in Japan. To construct dense and uniform networks covering the whole of Japan, it was designed to set up 1000 stations with an average spacing of 20km for high sensitivity and strong motion seismographs, and 100 stations with an average spacing of 100km for broadband seismograph. The construction and operation of these networks was charged to the NIED based on the experience in the Kanto-Tokai observation network. A large number of seismographs of several kinds were installed to realize this plan. High sensitivity seismographs were installed in a borehole of m depth in standard to assure high sensitive microearthquake observation at each site. The new network consisting of 696 high sensitivity stations is called Hi-net (High sensitivity seismograph network), which results a network of nearly 1250 high sensitivity stations in whole Japan if we include pre-existing stations. On the other hand, broadband seismographs were installed in a vault of 30 to 40 m long to assure stable operation at each site. The new
6 OECD/NEA WS 6/8 network consisting of 71 broadband stations is called F-net (Full-range seismograph network), which results a network of nearly 100 broadband stations in whole Japan if we include pre-existing stations. At most of the Hi-net stations strong-motion seismographs are also equipped both at the bottom of the borehole and on the ground surface. The network of 659 stations with such an uphole/downhole pair of strong-motion seismographs is called KiK-net (KIBAN Kyoshin network). The KiK-net made it possible to evaluate the effect of soil conditions of surface layers upon the amplitudes of seismic waves by comparing the strong motions at depth and at the ground surface. On the other hand the number of the K-NET stations is increased to 1034, where all the station numbers above are as of April In total, NIED is now operating nearly 1900 stations of several kinds of seismographs covering the whole of Japan. Figure 4. Configuration of Hi-net / KiK-net station Since October 1997, high-sensitivity data from the Hi-net as well as those from pre-existing seismic networks operated by various institutions have been transmitted to and processed in a unified manner by the Japan Meteorological Agency. Hi-net data are not only utilized to monitor the seismic activities in
7 OECD/NEA WS 7/8 and around Japan, but also shared to university group in real time by using satellite communication for their research works. At the same time, the data are collected by NIED, stored in their database system, and distributed to the public under a fully open policy (Okada et al., 2004). High quality data produced by these networks are not only used for monitoring of seismic activity but are providing a plenty of seeds for interesting researches. Using Hi-net, Obara (2002) found a phenomenon of non-volcanic deep tremor associated with subduction of the Philippine Sea plate over a length of 600km in southwest Japan. Using F-net, Kubo et al. (2002) analyzed maximum horizontal stress directions in and around Japan and local stress field in the focal zone of the western Tottori earthquake of 2000 (M7.3). Using K-NET and KiK-net, Honda et al.2004 analyzed rupture process of the Tokachi-oki earthquake of 2000 (M8.0). Figure 5. Distribution of peak accelerations at (a) m depth and (b)on the ground surface detected by K-NET and KiK-net associated to the western Tottori earthquake (M7.3) of October 6, 2000 References Fukuyama, E., M. Ishida, S. Hori, S. Sekiguchi, and S. Watada, Broadband seismic observation conducted under the FREESIA project, Rep. Natl. Res. Inst. Earth Sci. Disas. Prev., 57, (in Japanese with English abstract), 1996.
8 OECD/NEA WS 8/8 Hamada, K., M. Ohtake, Y. Okada, S. Matsumura, and H. Sato, A high quality digital network for microearthquake and ground tilt observations in the Kanto-Tokai area, Japan, Earthq. Pred. Res., 3, , Honda, R., S. Aoi, N. Morikawa, H. Sekiguchi, T. Kunugi, and H. Fujiwara, Ground motion and rupture process of the 2003 Tokachi-oki earthquake obtained from strong motion data of K-NET and KiK-net, Earth Planets Space, 56, , Ishida, M., Geometry and Relative Motion of the Philippine Sea Plate Beneath the Kanto-Tokai District, Japan, J. Geophys. Res., 97, , Kasahara, K., Patterns of crustal activity associated with the convergence of three plates in the Kanto-Tokai area, central Japan, Rep. Natl. Res. Cent. Disas. Prev., 35, (in Japanese with English abstract). Kinoshita, S., Kyoshin-net (K-NET), Seism. Res. Lett., 69, , Kubo, A., E. Fukuyama, H. Kawai, and K. Nomura, NIED seismic moment tensor catalogue for regional earthquakes around Japan: quality test and application, Tectonophysics, 356, 23-48, Matsumura, S., Focal zone of a future Tokai earthquake inferred from the seismicity pattern around the plate interface, Tectonophysics, 273, , Obara, K., Non-volcanic deep tremor associated with subduction in southwest Japan, Science, 296, , Okada,Y. and E.Yamamoto, Dyke intrusion model for the 1989 seismovolcanic activity off Ito, central Japan, J.Geophys.Res., 96, , Okada, Y., K. Kasahara, S. Hori, K. Obara, S. Sekiguchi, and A. Yamamoto Recent progress of seismic observation networks in Japan - Hi-net, F-net, K-NET and KiK-net -, Earth Planets Space, 56, (in press), Shimada, S., S. Sekiguchi, T. Eguchi, Y. Okada, and Y. Fujinawa, Preliminary results of the observation by fixed-point GPS simultaneous baseline determination network in Kanto-Tokai district, J. Geod. Soc. Japan, 35, 85-95, Takahashi, H., The deep borehole observatories and their contribution for revealing the characteristics of microearthquake activity in the Kanto district, Rep. Natl. Res. Cent. Disas. Prev., 28, (in Japanese with English abstract). Tsukahara, H. and R.Ikeda, Hydraulic Fracturing Stress Measurements and In-situ Stress Field in The Kanto-Tokai Area, Japan, Tectonophysics,
STRONG-MOTION SEISMOGRAPH NETWORK OPERATED BY NIED: K-NET AND KiK-net
Journal of Japan Association for Earthquake Engineering, Vol. 4, No. 3 (Special Issue), 2004 STRONG-MOTION SEISMOGRAPH NETWORK OPERATED BY NIED: K-NET AND KiK-net Shin AOI 1, Takashi KUNUGI 2, and Hiroyuki
More informationRecent progress of seismic observation networks in Japan Hi-net, F-net, K-NET and KiK-net
Research News Earth Planets Space, 56, xv xxviii, 24 Recent progress of seismic observation networks in Japan Hi-net, F-net, K-NET and KiK-net Yoshimitsu Okada 1, Keiji Kasahara 1, Sadaki Hori 1, Kazushige
More informationRecent Progress of Seismic Observation Networks in Japan
Journal of Physics: Conference Series Recent Progress of Seismic Observation Networks in Japan To cite this article: Y Okada 2013 J. Phys.: Conf. Ser. 433 012039 Related content - Physical applications
More informationLETTER Earth Planets Space, 58, 63 67, 2006
LETTER Earth Planets Space, 58, 63 67, 26 Spatial distribution of F-net moment tensors for the 25 West Off Fukuoka Prefecture Earthquake determined by the extended method of the NIED F-net routine Takumi
More informationGround motion and rupture process of the 2004 Mid Niigata Prefecture earthquake obtained from strong motion data of K-NET and KiK-net
LETTER Earth Planets Space, 57, 527 532, 25 Ground motion and rupture process of the 24 Mid Niigata Prefecture earthquake obtained from strong motion data of K-NET and KiK-net R. Honda 1,S.Aoi 1, N. Morikawa
More informationRECIPE FOR PREDICTING STRONG GROUND MOTIONS FROM FUTURE LARGE INTRASLAB EARTHQUAKES
RECIPE FOR PREDICTING STRONG GROUND MOTIONS FROM FUTURE LARGE INTRASLAB EARTHQUAKES T. Sasatani 1, S. Noguchi, T. Maeda 3, and N. Morikawa 4 1 Professor, Graduate School of Engineering, Hokkaido University,
More informationSome Problems Related to Empirical Predictions of Strong Motion
Bull. Earthq. Res. Inst. Univ. Tokyo Vol. 2+,**0 pp.,/-,/2 Some Problems Related to Empirical Predictions of Strong Motion Saburoh Midorikawa + * + Center for Urban Earthquake Engineering, Tokyo Institute
More informationSpecial feature: Are its lessons being adequately applied? Follow-up on the ten-year anniversary of the Hanshin-Awaji Earthquake
Special feature: Are its lessons being adequately applied? Follow-up on the ten-year anniversary of the Hanshin-Awaji Earthquake - Are we prepared for future massive earthquakes? - Hisakazu SAKAI Member
More informationPROBABILISTIC SEISMIC HAZARD MAPS AT GROUND SURFACE IN JAPAN BASED ON SITE EFFECTS ESTIMATED FROM OBSERVED STRONG-MOTION RECORDS
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 3488 PROBABILISTIC SEISMIC HAZARD MAPS AT GROUND SURFACE IN JAPAN BASED ON SITE EFFECTS ESTIMATED FROM
More informationMoment tensor inversion of near source seismograms
Moment tensor inversion of near source seismograms Yuji Yagi and Naoki Nishimura ABSTRACT We construct a program set for estimating moment tensor solution using near source seismograms. We take the effect
More informationGround Motion Validation of the +3,- Kanto Earthquake Using the New Geometry of the Philippine Sea Slab and Integrated -D Velocity-Structure Model
Bull. Earthq. Res. Inst. Univ. Tokyo Vol. 2+,**0 pp.,01,1, Ground Motion Validation of the +3,- Kanto Earthquake Using the New Geometry of the Philippine Sea Slab and Integrated -D Velocity-Structure Model
More informationA slow slip event in the Tokai area detected by tilt and seismic observation and its possible recurrence
Earth Planets Space, 57, 917 923, 2005 A slow slip event in the Tokai area detected by tilt and seismic observation and its possible recurrence Eiji Yamamoto, Shozo Matsumura, and Tadashi Ohkubo National
More informationA Prototype of Strong Ground Motion Prediction Procedure for Intraslab Earthquake based on the Characterized Source Model
A Prototype of Strong Ground Motion Prediction Procedure for Intraslab Earthquake based on the Characterized Source Model T. Iwata, K. Asano & H. Sekiguchi Disaster Prevention Research Institute, Kyoto
More informationBorehole Strong Motion Observation along the Itoigawa-Shizuoka Tectonic Line
Borehole Strong Motion Observation along the Itoigawa-Shizuoka Tectonic Line Hiroe Miyake, Minoru Sakaue & Kazuki Koketsu Earthquake Research Institute, University of Tokyo, Japan Yasuo Izutani Shinshu
More informationSource characterization of induced earthquakes by the 2011 off Tohoku, Japan, earthquake based on the strong motion simulations
Source characterization of induced earthquakes by the 2011 off Tohoku, Japan, earthquake based on the strong motion simulations K. Somei & K. Miyakoshi Geo-Reserch Institute, Osaka, Japan SUMMARY: A great
More informationStrong Ground Motion Evaluation in the Tokyo Metropolitan Area: The 1923 Kanto Earthquake and Future Subduction-Zone Earthquakes
Strong Ground Motion Evaluation in the Tokyo Metropolitan Area: The 1923 Kanto Earthquake and Future Subduction-Zone Earthquakes Kazuki Koketsu 1) and Hiroe Miyake 2) 1) Earthquake Research Institute,
More informationACTIVITIES OF THE HEADQUARTERS FOR EARTHQUAKE RESEARCH PROMOTION
Journal of Japan Association for Earthquake Engineering, Vol.4, No.3 (Special Issue), 2004 ACTIVITIES OF THE HEADQUARTERS FOR EARTHQUAKE RESEARCH PROMOTION Sadanori HIGASHI 1 1 Member of JAEE, Earthquake
More informationREPORT ON THE TOHOKU AREA PASIFIC OFFSHORE EARTHQUAKE
REPORT ON THE TOHOKU AREA PASIFIC OFFSHORE EARTHQUAKE GENERAL PERSPECTIVE The Highest Magnitude Ever Recorded The 2011 off the Pacific Coast of Tohoku Earthquake (hereafter, the 2011 Tohoku- Pacific Earthquake
More informationLong-period Ground Motion Characteristics of the Osaka Sedimentary Basin during the 2011 Great Tohoku Earthquake
Long-period Ground Motion Characteristics of the Osaka Sedimentary Basin during the 2011 Great Tohoku Earthquake K. Sato, K. Asano & T. Iwata Disaster Prevention Research Institute, Kyoto University, Japan
More informationRupture process of the 2007 Chuetsu-oki, Niigata, Japan, earthquake Waveform inversion using empirical Green s functions
Earth Planets Space, 60, 1169 1176, 2008 Rupture process of the 2007 Chuetsu-oki, Niigata, Japan, earthquake Waveform inversion using empirical Green s functions Atsushi Nozu Independent Administrative
More informationSource Process and Constitutive Relations of the 2011 Tohoku Earthquake Inferred from Near-Field Strong-Motion Data
Source Process and Constitutive Relations of the 2011 Tohoku Earthquake Inferred from Near-Field Strong-Motion Data Kunikazu Yoshida, Anatoly Petukhin & Ken Miyakoshi Geo-Research Institute, Japan Koji
More informationComplicated repeating earthquakes on the convergent plate boundary: Rupture processes of the 1978 and 2005 Miyagi-ken Oki earthquakes
Complicated repeating earthquakes on the convergent plate boundary: Rupture processes of the 1978 and 2005 Miyagi-ken Oki earthquakes Changjiang Wu 1 and Kazuki Koketsu Earthquake Research Institute, University
More informationAVERAGE AND VARIATION OF FOCAL MECHANISM AROUND TOHOKU SUBDUCTION ZONE
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 24 Paper No. 414 AVERAGE AND VARIATION OF FOCAL MECHANISM AROUND TOHOKU SUBDUCTION ZONE Shunroku YAMAMOTO 1 Naohito
More informationDevelopment of a Predictive Simulation System for Crustal Activities in and around Japan - II
Development of a Predictive Simulation System for Crustal Activities in and around Japan - II Project Representative Mitsuhiro Matsu'ura Graduate School of Science, The University of Tokyo Authors Mitsuhiro
More informationNATIONWIDE SITE AMPLIFICATION ZONATION STUDY USING JAPAN ENGINEERING GEOMORPHOLOGIC CLASSIFICATION MAP
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 24 Paper No. 1648 NATIONWIDE SITE AMPLIFICATION ZONATION STUDY USING JAPAN ENGINEERING GEOMORPHOLOGIC CLASSIFICATION
More informationVery low frequency earthquakes excited by the 2004 off the Kii peninsula earthquakes: A dynamic deformation process in the large accretionary prism
LETTER Earth Planets Space, 57, 321 326, 25 Very low frequency earthquakes excited by the 2 off the Kii peninsula earthquakes: A dynamic deformation process in the large accretionary prism Kazushige Obara
More informationEffects of Surface Geology on Seismic Motion
4 th IASPEI / IAEE International Symposium: Effects of Surface Geology on Seismic Motion August 23 26, 2011 University of California Santa Barbara TUNING THE DEEP VELOCITY STRUCTURE MODEL OF THE TOKYO
More informationSimulated Earthquake Ground Motion for Structural Design"
14 th U.S.-Japan Workshop on the Improvement of Building Structural Design and Construction Practices Simulated Earthquake Ground Motion for Structural Design" Satoru Nagase Structural Engineering Section,
More informationEffects of Surface Geology on Seismic Motion
4 th IASPEI / IAEE International Symposium: Effects of Surface Geology on Seismic Motion August 23 26, 2011 University of California Santa Barbara A STUDY ON THE ESTIMATION METHOD FOR UNDERGROUND STRUCTURE
More informationEffects of Surface Geology on Seismic Motion
4 th IASPEI / IAEE International Symposium: Effects of Surface Geology on Seismic Motion August 23 26, 2011 University of California Santa Barbara TESTING THREE-DIMENSIONAL BASIN STRUCTURE MODEL OF THE
More informationJOURNAL OF GEOPHYSICAL RESEARCH, VOL. 109, B08306, doi: /2004jb002980, 2004
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 109,, doi:10.1029/2004jb002980, 2004 Analysis of the 2001 Geiyo, Japan, earthquake using high-density strong ground motion data: Detailed rupture process of a slab
More informationSEISMIC HAZARD ASSESSMENT FOR JAPAN AFTER THE 2011 TOHOKU-OKI MEGA-THRUST EARTHQUAKE (Mw9.0)
Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake, March 1-4, 2012, Tokyo, Japan SEISMIC HAZARD ASSESSMENT FOR JAPAN AFTER THE 2011 TOHOKU-OKI
More informationGlobal Positioning System(GPS) Global Positioning System(GPS) is a new surveying technique applying space technology designed by the United States
IV/317 Crustal deformations in the Japanese islands observed with the nationwide continuous GPS observation system Takashi TADA (Crustal Dynamics Department, Geographical Survey Institute, Tsukuba, Ibaraki,
More informationAnnual Report for Research Work in the fiscal year 2005
JST Basic Research Programs C R E S T (Core Research for Evolutional Science and Technology) Annual Report for Research Work in the fiscal year 2005 Research Area : High Performance Computing for Multi-scale
More informationEffects of subsurface structures of source regions on long period ground motions observed in the Tokyo Bay area, Japan
Uetake Earth, Planets and Space (27) 69:7 DOI.86/s4623-7-6-x LETTER Open Access Effects of subsurface structures of source regions on long period ground motions observed in the Tokyo Bay area, Japan Tomiichi
More informationSOURCE MODELING OF SUBDUCTION-ZONE EARTHQUAKES AND LONG-PERIOD GROUND MOTION VALIDATION IN THE TOKYO METROPOLITAN AREA
SOURCE MODELING OF SUBDUCTION-ZONE EARTHQUAKES AND LONG-PERIOD GROUND MOTION VALIDATION IN THE TOKYO METROPOLITAN AREA ABSTRACT : Hiroe Miyake 1, Kazuki Koketsu 2, and Takashi Furumura 3,2 1 Assistant
More informationThe 2011 off the Pacific coast of Tohoku Earthquake related to a strong velocity gradient with the Pacific plate
LETTER Earth Planets Space, 63, 663 667, 2011 The 2011 off the Pacific coast of Tohoku Earthquake related to a strong velocity gradient with the Pacific plate Makoto Matsubara 1 and Kazushige Obara 2 1
More information気象研究所技術報告第 77 号 2017 第 1 章巨大地震の規模等の把握 1.1 様々な早期規模推定手法 本項の論文は, 著者からの転載許可を受けて掲載している (Katsumata, A., S. Aoki, Y. Yoshida, H. Ueno and T. Yokota, 2012: Ra
第 1 章巨大地震の規模等の把握 1.1 様々な早期規模推定手法 本項の論文は, 著者からの転載許可を受けて掲載している (Katsumata, A., S. Aoki, Y. Yoshida, H. Ueno and T. Yokota, 2012: Rapid source parameter estimation of great earthquakes for tsunami warning,
More informationSource Characteristics of Large Outer Rise Earthquakes in the Pacific Plate
Source Characteristics of Large Outer Rise Earthquakes in the Pacific Plate T. Sasatani, N. Takai, M. Shigefuji, and Y. Miyahara Hokkaido University, Sapporo, Japan W. Kawabata Electric Power Development
More informationDamage Estimation of the Road Bridge Structure Using the Seismic Hazard map for BCM in Hokkaido, Japan
Damage Estimation of the Road Bridge Structure Using the Seismic Hazard map for BCM in Hokkaido, Japan T. Sato & H. Nishi Civil Engineerring Research Institute for Cold Region, PWRI,Japan T. Ikeda & Y.
More informationTHEORETICAL EVALUATION OF EFFECTS OF SEA ON SEISMIC GROUND MOTION
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 3229 THEORETICAL EVALUATION OF EFFECTS OF SEA ON SEISMIC GROUND MOTION Ken HATAYAMA 1 SUMMARY I evaluated
More informationNational Research Institute for Earth Science and Disaster Resilience
National Research and Development Agency National Research Institute for Earth Science and Disaster Resilience NIED aims to realize a society resilient to natural disasters through improving the level
More informationREAL-TIME ASSESSMENT OF EARTHQUAKE DISASTER IN YOKOHAMA BASED ON DENSE STRONG-MOTION NETWORK
REAL-TIME ASSESSMENT OF EARTHQUAKE DISASTER IN YOKOHAMA BASED ON DENSE STRONG-MOTION NETWORK Saburoh MIDORIKAWA 1 And Susumu ABE 2 SUMMARY This paper describes a system for REal-time Assessment of earthquake
More informationLONG-PERIOD GROUND MOTION SIMULATION OF OSAKA SEDIMENTARY BASIN FOR A HYPOTHETICAL NANKAI SUBDUCTION EARTHQUAKE
JOINT CONFERENCE PROCEEDINGS 7th International Conference on Urban Earthquake Engineering (7CUEE) & 5th International Conference on Earthquake Engineering (5ICEE) March 3-5, 2010, Tokyo Institute of Technology,
More informationStrong ground motions from the 2011 off-the Pacific-Coast-of-Tohoku, Japan (Mw=9.0) earthquake obtained from a dense nationwide seismic network
Landslides (2011) 8:333 338 DOI 10.1007/s10346-011-0279-3 Received: 10 June 2011 Accepted: 5 July 2011 Published online: 23 July 2011 The Author(s) 2011. This article is published with open access at Springerlink.com
More informationTHREE-DIMENSIONAL FINITE DIFFERENCE SIMULATION OF LONG-PERIOD GROUND MOTION IN THE KANTO PLAIN, JAPAN
THREE-DIMENSIONAL FINITE DIFFERENCE SIMULATION OF LONG-PERIOD GROUND MOTION IN THE KANTO PLAIN, JAPAN Nobuyuki YAMADA 1 And Hiroaki YAMANAKA 2 SUMMARY This study tried to simulate the long-period earthquake
More informationSeismic Activity and Crustal Deformation after the 2011 Off the Pacific Coast of Tohoku Earthquake
J-RAPID Symposium March 6-7, 2013 Seismic Activity and Crustal Deformation after the 2011 Off the Pacific Coast of Tohoku Earthquake Y. Honkura Tokyo Institute of Technology Japan Science and Technology
More informationSpecial edition paper Development of Shinkansen Earthquake Impact Assessment System
Development of Shinkansen Earthquake Impact Assessment System Makoto Shimamura*, Keiichi Yamamura* Assuring safety during earthquakes is a very important task for the Shinkansen because the trains operate
More informationDynamic Triggering Semi-Volcanic Tremor in Japanese Volcanic Region by The 2016 Mw 7.0 Kumamoto Earthquake
Dynamic Triggering Semi-Volcanic Tremor in Japanese Volcanic Region by The 016 Mw 7.0 Kumamoto Earthquake Heng-Yi Su 1 *, Aitaro Kato 1 Department of Earth Sciences, National Central University, Taoyuan
More informationLong-period ground motion simulation in the Kinki area during the MJ 7.1 foreshock of the 2004 off the Kii peninsula earthquakes
LETTER Earth Planets Space, 57, 197 202, 2005 Long-period ground motion simulation in the Kinki area during the MJ 7.1 foreshock of the 2004 off the Kii peninsula earthquakes Nobuyuki Yamada and Tomotaka
More informationBROADBAND STRONG MOTION SIMULATION OF THE 2004 NIIGATA- KEN CHUETSU EARTHQUAKE: SOURCE AND SITE EFFECTS
Third International Symposium on the Effects of Surface Geology on Seismic Motion Grenoble, France, 30 August - 1 September 2006 Paper Number: 105 BROADBAND STRONG MOTION SIMULATION OF THE 2004 NIIGATA-
More informationLETTER Earth Planets Space, 56, , 2004
LETTER Earth Planets Space, 56, 353 357, 2004 Deep seismic activities preceding the three large shallow earthquakes off south-east Hokkaido, Japan the 2003 Tokachi-oki earthquake, the 1993 Kushiro-oki
More informationA STRONG MOTION SIMULATION METHOD SUITABLE FOR AREAS WITH LESS INFORMATION ON SUBSURFACE STRUCTURE - KOWADA'S METHOD AND ITS APPLICATION TO SHALLOW CRUSTAL EARTHQUAKES IN JAPAN - A. Nozu 1, T. Nagao 2
More informationEffects of Surface Geology on Seismic Motion
4 th IASPEI / IAEE International Symposium: Effects of Surface Geology on Seismic Motion August 23 26, 2011 University of California Santa Barbara DEEP S-WAVE VELOCITY STRUCTURES IN THE TOKYO METROPOLITAN
More informationHigh Acceleration Motions generated from the 2011 Pacific coast off Tohoku, Japan Earthquake
High Acceleration Motions generated from the 2011 Pacific coast off Tohoku, Japan Earthquake K. Irikura Disaster Prevention Research Center, Aichi Institute of Technology, Japan S. Kurahashi Disaster Prevention
More informationOutline of the 2011 off the Pacific coast of Tohoku Earthquake (M w 9.0) Earthquake Early Warning and observed seismic intensity
LETTER Earth Planets Space, 63, 547 551, 2011 Outline of the 2011 off the Pacific coast of Tohoku Earthquake (M w 9.0) Earthquake Early Warning and observed seismic intensity Mitsuyuki Hoshiba 1, Kazuhiro
More informationLETTER Earth Planets Space, 57, , 2005
LETTER Earth Planets Space, 57, 345 35, 25 Estimation of the source model for the foreshock of the 24 off the Kii peninsula earthquakes and strong ground motion simulation of the hypothetical Tonankai
More informationLONG-PERIOD SITE RESPONSE IN THE TOKYO METROPOLITAN AREA
Sixth International Conference on Urban Earthquake Engineering March 3-4, 2009, Tokyo Institute of Technology, Tokyo, Japan LONG-PERIOD SITE RESPONSE IN THE TOKYO METROPOLITAN AREA Kenichi Tsuda 1), Takashi
More informationLatitude: 34 31'13" N, Longitude: '45" E, Elevation: 508 m (Miyatsukayama) (Triangulation Point - Toshima)
59. Toshima Latitude: 34 31'13" N, Longitude: 139 16'45" E, Elevation: 508 m (Miyatsukayama) (Triangulation Point - Toshima) Overview of Toshima taken from northwest side on October 30, 2002 by the Japan
More informationScenario Earthquake Shaking Maps in Japan
1 Scenario Earthquake Shaking Maps in Japan Nobuyuki Morikawa National Research Institute for Earth Science and Disaster Prevention (NIED), JAPAN Scenario Earthquake Shaking Maps (SESMs) The shaking maps
More informationRupture process of the 2005 West Off Fukuoka Prefecture, Japan, earthquake
LETTER Earth Planets Space, 8, 87 92, 26 Rupture process of the 2 West Off Fukuoka Prefecture, Japan, earthquake Haruo Horikawa Active Fault Research Center, National Institute of Advanced Industrial Science
More informationEstimation of Damage Ratios of Wooden Houses and Water Distribution Pipelines in an Earthquake Scenario for the Tokyo Metropolitan Region
The 2011 World Congress on Advances in Structural Engineering and Mechanics (ASEM'11 + ) Seoul, Korea, 18-22 September, 2011 Estimation of Damage Ratios of Wooden Houses and Water Distribution Pipelines
More informationHistorical Maximum Seismic Intensity Maps in Japan from 1586 to 2004: Construction of Database and Application. Masatoshi MIYAZAWA* and Jim MORI
Annuals of Disas. Prev. Res. Inst., Kyoto Univ., No. 4C, 25 Historical Maximum Seismic Intensity Maps in Japan from 6 to 24: Construction of Database and Application Masatoshi MIYAZAWA* and Jim MORI *
More informationInversion Analysis of Historical Interplate Earthquakes Using Seismic Intensity Data
Inversion Analysis of Historical Interplate Earthquakes Using Seismic Intensity Data Katsuhisa Kanda and Masayuki Takemura Kobori Research Complex, Kajima Corporation, Tokyo 107-8502, Japan Summary An
More information4 Associate Professor, DPRI, Kyoto University, Uji, Japan
Proceedings of the International Symposium on Engineering Lessons Learned from the 2 Great East Japan Earthquake, March -4, 22, Tokyo, Japan STRONG MOTION ESTIMATION AT THE ELEVATED BRIDGES OF THE TOHOKU
More informationA Study on the Prediction of Long-Period Ground Motions from Intraslab Earthquakes
A Study on the Prediction of Long-Period Ground Motions from Intraslab Earthquakes Yadab Prasad DHAKAL Candidate for the Doctor of Engineering Supervisor: Prof. Tsutomu SASATANI Division of Architectural
More informationby A. Nozu and K. Irikura Introduction
Bulletin of the Seismological Society of America, Vol. 98, No. 1, pp. 18 197, February 28, doi: 1.1785/126183 Strong-Motion Generation Areas of a Great Subduction-Zone Earthquake: Waveform Inversion with
More informationA NEW SEISMICITY MAP IN THE KANTO. Tokyo, Japan (Received October 25, 1978)
A NEW SEISMICITY MAP IN THE KANTO DISTRICT, JAPAN Tokyo, Japan (Received October 25, 1978) In order to improve the accuracy of the hypocenter locations in the Kanto district, Japan, station corrections
More informationSource rupture process of the 2003 Tokachi-oki earthquake determined by joint inversion of teleseismic body wave and strong ground motion data
LETTER Earth Planets Space, 56, 311 316, 2004 Source rupture process of the 2003 Tokachi-oki earthquake determined by joint inversion of teleseismic body wave and strong ground motion data Yuji Yagi International
More informationA complex rupture image of the 2011 off the Pacific coast of Tohoku Earthquake revealed by the MeSO-net
LETTER Earth Planets Space, 63, 583 588, 2011 A complex rupture image of the 2011 off the Pacific coast of Tohoku Earthquake revealed by the MeSO-net Ryou Honda 1, Yohei Yukutake 1, Hiroshi Ito 1, Masatake
More informationPREDICTION OF AVERAGE SHEAR-WAVE VELOCITY FOR GROUND SHAKING MAPPING USING THE DIGITAL NATIONAL LAND INFORMATION OF JAPAN
th World Conference on Earthquake Engineering Vancouver, B.C., Canada August -6, 00 Paper No. 07 PREDICTION OF AVERAGE SHEAR-WAVE VELOCITY FOR GROUND SHAKING MAPPING USING THE DIGITAL NATIONAL LAND INFORMATION
More informationReal Time Monitoring System for Megathrust Earthquakes and Tsunamis - Cabled Network System and Buoy System in Japan -
Real Time Monitoring System for Megathrust Earthquakes and Tsunamis - Cabled Network System and Buoy System in Japan - 1 Subduction zones around the world Haiti Italy Turkey Tohoku Sichuan Taiwan Sumatra
More informationMECHANISM OF THE 2011 TOHOKU-OKI EARTHQUAKE: INSIGHT FROM SEISMIC TOMOGRAPHY
Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake, March 1-4, 2012, Tokyo, Japan MECHANISM OF THE 2011 TOHOKU-OKI EARTHQUAKE: INSIGHT FROM
More informationAlong strike variations in short term slow slip events in the southwest Japan subduction zone
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115,, doi:10.1029/2008jb006059, 2010 Along strike variations in short term slow slip events in the southwest Japan subduction zone Shutaro Sekine, 1,2 Hitoshi Hirose,
More informationOccurrence of quasi-periodic slow-slip off the east coast of the Boso peninsula, Central Japan
LETTER Earth Planets Space, 9, 11 1, Occurrence of quasi-periodic slow-slip off the east coast of the Boso peninsula, Central Japan Shinzaburo Ozawa, Hisashi Suito, and Mikio Tobita Geographical Survey
More informationTectonic Processes and Hazards Enquiry Question 1: Why are some locations more at risk from tectonic hazards?
Tectonic Processes and Hazards Enquiry Question 1: Why are some locations more at risk from tectonic hazards? Key words Basalt Andesite Rhyolite Benioff Zone Subduction zone Crustal fracturing Definition
More informationThe San Andreas Fault Observatory at Depth: Recent Site Characterization Studies and the 2.2-Km-Deep Pilot Hole
The San Andreas Fault Observatory at Depth: Recent Site Characterization Studies and the 2.2-Km-Deep Pilot Hole Steve Hickman and Bill Ellsworth (USGS) Mark Zoback (Stanford University) and the Pre-EarthScope
More informationEffects of Surface Geology on Seismic Motion
4 th IASPEI / IAEE International Symposium: Effects of Surface Geology on Seismic Motion August 23 26, 2011 University of California Santa Barbara ESTIMATION OF INTERSTATION GREEN S FUNCTIONS IN THE LONG-PERIOD
More informationCONTROLLING FACTORS OF STRONG GROUND MOTION PREDICTION FOR SCENARIO EARTHQUAKES
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 2801 CONTROLLING FACTORS OF STRONG GROUND MOTION PREDICTION FOR SCENARIO EARTHQUAKES Hiroe MIYAKE 1,
More informationSpatial distribution of centroid moment tensor solutions for the 2004 off Kii peninsula earthquakes
LETTER Earth Planets Space, 57, 351 356, 25 Spatial distribution of centroid moment tensor solutions for the 24 off Kii peninsula earthquakes Yoshihiro Ito, Takumi Matsumoto, Hisanori Kimura, Hirotoshi
More informationEffects of Surface Geology on Seismic Motion
4 th IASPEI / IAEE International Symposium: Effects of Surface Geology on Seismic Motion August 23 26, 2011 University of California Santa Barbara Temporal Changes of Site Response During the Mw9.0 Tohoku
More informationContinuously Monitored by JMA. Latitude: 34 13'10" N, Longitude: '11" E, Elevation: 572 m (Tenjosan) (Triangulation Point - Kozushima)
61. Kozushima Continuously Monitored by JMA Latitude: 34 13'10" N, Longitude: 139 09'11" E, Elevation: 572 m (Tenjosan) (Triangulation Point - Kozushima) Overview of Kozushima taken from south-southeast
More informationDisaster Prevention Research Section, Technology Center, Taisei Corporation, Yokohama, Japan 2
LONG-PERIOD GROUND MOTION SIMULATION OF 2004 OFF THE KII PENINSULA EARTHQUAKES AND PREDICTION OF FUTURE M8 CLASS EARTHQUAKES ALONG NANKAI TROUGH SUBDUCTION ZONE, SOUTH OF JAPAN ISLAND Chiaki Yoshimura
More informationThe great earthquakes that have shaped Japan 日本に大きな影響を与えた地震
The great earthquakes that have shaped Japan 日本に大きな影響を与えた地震 Brian Kennett, Research School of Earth Sciences, ANU Takashi Furumura Earthquake Research Institute, University of Tokyo Japan tectonic plates
More informationCoseismic slip distribution of the 1946 Nankai earthquake and aseismic slips caused by the earthquake
Earth Planets Space, 53, 235 241, 2001 Coseismic slip distribution of the 1946 Nankai earthquake and aseismic slips caused by the earthquake Yuichiro Tanioka 1 and Kenji Satake 2 1 Meteorological Research
More informationFault Length and Direction of Rupture Propagation for the 1993 Kushiro-Oki Earthquake as Derived from Strong Motion Duration
Letter J. Phys. Earth, 41, 319-325, 1993 Fault Length and Direction of Rupture Propagation for the 1993 Kushiro-Oki Earthquake as Derived from Strong Motion Duration Yasuo Izutani Faculty of Engineering,
More informationRELATION BETWEEN RAYLEIGH WAVES AND UPLIFT OF THE SEABED DUE TO SEISMIC FAULTING
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 24 Paper No. 1359 RELATION BETWEEN RAYLEIGH WAVES AND UPLIFT OF THE SEABED DUE TO SEISMIC FAULTING Shusaku INOUE 1,
More informationSite-Response Estimation for the 2003 Miyagi-Oki Earthquake Sequence Considering Nonlinear Site Response
Bulletin of the Seismological Society of America, Vol. 96, No. 4A, pp. 1474 1482, August 2006, doi: 10.1785/0120050160 Site-Response Estimation for the 2003 Miyagi-Oki Earthquake Sequence Considering Nonlinear
More information68. Izu-Torishima. Summary. Latitude: 30 29'02" N, Longitude: '11" E, Elevation: 394 m (Ioyama) (Elevation Point) (68.
68. Izu-Torishima Latitude: 30 29'02" N, Longitude: 140 18'11" E, Elevation: 394 m (Ioyama) (Elevation Point) Izu-Torishima taken from southeast side on August 12, 2002. Courtesy of the Maritime Safety
More informationDeep Seismic Surveys in the Kinki District : Shingu- Maizuru Line
Bull. Earthq. Res. Inst. Univ. Tokyo Vol. 2+,**0 pp.,-3,./ Deep Seismic Surveys in the Kinki District : Shingu- Maizuru Line Kiyoshi Ito +, Yasuhiro Umeda +, Hiroshi Sato,, Issei Hirose +, Naoshi Hirata,,
More informationAnnual Report for Research Work in the fiscal year 2006
JST Basic Research Programs C R E S T (Core Research for Evolutional Science and Technology) Annual Report for Research Work in the fiscal year 2006 Research Area : High Performance Computing for Multi-scale
More informationAmplification of Tsunami Heights by Delayed Rupture of Great Earthquakes along the Nankai Trough
Amplification of Tsunami Heights by Delayed Rupture of Great Earthquakes along the Nankai Trough Kentaro Imai 1,2, Kenji Satake 2 and Takashi Furumura 1,2 1 Center for Integrated Disaster Information Research,
More informationSOURCE, PATH AND SITE EFFECTS ON STRONG GROUND MOTIONS FROM THE 2003 TOKACHI-OKI EARTHQUAKE SEQUENCE
4 th International Conference on Earthquake Geotechnical Engineering June 25-28, 2007 Paper No. ++++ SOURCE, PATH AND SITE EFFECTS ON STRONG GROUND MOTIONS FROM THE 2003 TOKACHI-OKI EARTHQUAKE SEQUENCE
More informationExploring the feasibility of on-site earthquake early warning using close-in records of the 2007 Noto Hanto earthquake
LETTER Earth Planets Space, 60, 155 160, 2008 Exploring the feasibility of on-site earthquake early warning using close-in records of the 2007 Noto Hanto earthquake Yih-Min Wu 1 and Hiroo Kanamori 2 1
More informationEARTHQUAKE DISASTER RISK MITIGATION BEFORE AND AFTER THE 1995 KOBE EARTHQUAKE
13 th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 5005 EARTHQUAKE DISASTER RISK MITIGATION BEFORE AND AFTER THE 1995 KOBE EARTHQUAKE Tsuneo KATAYAMA 1
More informationPRELIMINARY STUDY OF GROUND MOTION CHARACTERISTICS IN FURUKAWA DISTRICT, JAPAN, BASED ON VERY DENSE SEISMIC-ARRAY-OBSERVATION
Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake, March 1-4, 2012, Tokyo, Japan PRELIMINARY STUDY OF GROUND MOTION CHARACTERISTICS IN
More informationScaling relationship between the duration and the amplitude of non-volcanic deep low-frequency tremors
GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L07305, doi:10.1029/2007gl029391, 2007 Scaling relationship between the duration and the amplitude of non-volcanic deep low-frequency tremors Tomoko Watanabe, 1 Yoshihiro
More informationGROUND MOTION CHARACTERISTIC IN THE KAOHSIUNG & PINGTUNG AREA, TAIWAN
GROUND MOTION CHARACTERISTIC IN THE KAOHSIUNG & PINGTUNG AREA, TAIWAN Hsien-Jen Chiang 1, Kuo-Liang Wen 1, Tao-Ming Chang 2 1.Institute of Geophysics, National Central University,ROC 2.Department of Information
More informationJapan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, Kanagawa, , JAPAN
LARGE EARTHQUAKE AND ASSOCIATED PHENOMENA OBSERVED WITH SEAFLOOR CABLED OBSERVATORY NEAR EPICENTER - AN IMPLICATION FOR POSSIBLE ADDITIONAL MEASUREMENT WITH TELECOMMUNICATION NETWORKS FOR IDENTIFICATION
More informationDepth-dependent slip regime on the plate interface revealed from slow earthquake activities in the Nankai subduction zone
2010/10/11-14 Earthscope Workshop Depth-dependent slip regime on the plate interface revealed from slow earthquake activities in the Nankai subduction zone Kazushige Obara, ERI, Univ. Tokyo Recurrence
More information