(,, ) ,,, Hz, (3 5 TERRA scope. SN) ( TERRA scope) (USGS NSN ),

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1 8 (320 ) No18 ( Serial No1320) Recent Developments in World Seismology August (,, ) ( ),, ; ( ) ; ; P A, 1 ( ) 1. 1 ( ) ( BD2 SN) ( TERRA scope) (USGS NSN ), (Med Net) ( FREESLA ) D reger [ 1 ] 3 : Pasyanos [ 2 ],, Hz,, ( ),, ( ) [ 3 ], Jone [ 3 ] (3 5 TERRA scope ),,, 45 4

2 2 2005,,, 70 bar,,, ( ) 1. 2 ( ) Kikuchi [ 4 ] IR IS ( ) , 30 s, 75 km 40 km, 3. 1 m, 4. 2 MPa, N m ( M W = 7. 6), ( asperity), 20 km, ( ) ( ), 20 MPa, 8 m Velasco [ 5 ], M S 7. 9,, 20 s,, s,,, Q,, Q Castro [ 6 ], ,,, 2 km Q 16 52, Q, K, K, K Q, B indi [ 7 ] (1. 4 M L 4. 5), K 1. 2, - 2 B rune, logm 0 = 1. 12M L S bar, m 1. 3 Huang [ 8 ]

3 8 : PKP 1 10 s, 4 : 10 s,, ( P S )u ( t) R g ( t) : u ( t) R g ( t), u ( t) = R g ( t) / 4 c 3 r, c PS, r, u ( t), R g ( t), : P, S P S SJG ( 32 ) P : 10 s, 3 ; 5, , M W 6. 9,,,, ( ) 2 SAG [ 9 ],, SAG, P SV SH, r,,, 7 Lund [ 9 ], M L ,,, 3

4 [ 10 ] B eresnev, Q ( ) c, M 0 : Q ( ) M 0 2 c, c v max, Q ( ) M 0 v max : Q ( ) M 0 v 2 max, v 2 max Q ( ) /M 0, Beresnev,,,,,, A tkinson and Boore [ 11 ], v max,,, [ 3 ],, 4 (M > 4. 5),,, [ 12, 13 ],, FPF IT, FPF IT P,,,,,,, P,, SP [ 14 ],, Snock

5 8 : 5,, Mozum i Mozum i, Snock A totsugawa, A totsugwa 5 Holland [ 15 ],,,, 0 f c [ 16 ] 0 f c, - 2,, 0 f c 0 f c,,, Moya [ 16 ], B rune,,,, M 0 - f c M 0 f 3 c J in [ 17 ] A totsugawa 102,, Q, 6 Chen [ 18 ] 6 :,, m 1, ( M m hf, ) m 1 1 km, 1 Hz 6, (M < 6 ), B rune ( single2corner) ( - 2 ), 100 bar (10 MPa), ( two2corner), (M 6 ),, ( m ),,,

6 6 2005, S ( 100 km ), Lg,, R = 0. 37v S / v B rune - 2, 8,,,,, [ 11 ] 7 M iyake [ 19 ],, Hz,, M 0 2 /3,,, - 2,,, R = v S /f B rune,, H iramatsu [ 20 ] m ( ) f c M 0 ( 10 khz) M 0 f c - 3, (100 Hz) : M 0 f c Hz, M 0 f c - 4 : M 0 f c - 3,, H ira2 matsu , (, : yqzhu@ stn. sh. cn) [ 1 ] D reger D, R Uhrhammer, M Pasyanos, et al. Regional and Far2regional Earthquake Locations and Source Pa2 rameters U sing Sparse B roadband Network. BSSA, 1998, 88 ( 6) : [ 2 ] PasyanosM, D D reger and B Romanowicz. Toward Real2time Estimation of RegionalMoment Tensors. BSSA, 1996, 86 (5) : [ 3 ] Jones L E and D V Helmberger. Earthquake Source Parameters and Fault Kinematics in the Eastern California Shear Zone. BSSA, 1998, 88 ( 6) : [ 4 ] KikuchiM, Y Yagi and Y Yamanaka. Source Process of the Chi2Chi, Taiwan, Earthquake of Sep tember 21, 1999 Inferred From Teleseism ic BodyW aves. Bull. Earthq. Res. Inst, 2000, 72: 1213

7 8 : 7 [ 5 ] Velasco A A, J A Charles and L B Susan. B road Band Source Modeling of the November 8, 1997, Tibet(M W = 7. 5) Earthquake and Its Tectonic Imp lications. JGR, 2000, 105 (B12) : [ 6 ] Castro R R, T Luca, M Giancarlo, et al. The SpectralDecay Parameter K in the Region of Umbria2M arche, It2 aly. JGR, 2000, 105 (B10) : [ 7 ] B D ino, D Spallarossa, P Augliera, et al. Source Parameters Estimated from the Aftershocks of the 1997 Um2 bria2marche ( Italy) Seism ic Sequence. BSSA, 2001, 91 ( 3) : [ 8 ] Huang B S. Characteristics of Seism ic Radiation During the 1994 Bolivian Earthquake and Imp lications for Rup ture Mechanism s. GRL, 2002, 29 (7) : [ 9 ] Lund B and B Reynir. Correlation ofm icroearthquake Body2W ave Special Amp litudes. BSSA, 2002, 92 ( 6) : [ 10 ] Beresnev IA. W hatw e can and Cannot Learn About Earthquake Sources From the Spectra of Seism ic W aves. BSSA, 2001, 91 ( 2) : [ 11 ] A tkinson G M and D M Boore. Evaluation ofmodeles for Earthquake Source Spectra in Eastern North America. BSSA, 1998, 88 ( 4) : [ 12 ] Hardebeck J L and P M Shearer. A New Method for Determ ining First2motion Focal Mechanism s. BSSA, 2002, 92 (6) : [ 13 ] Kilb D. Fault Parameter Constraints U sing Relocated Earthquakes: Imp lications for Stress Change Calculations. EOS, 2001, 82, Foll [ 14 ] Snoke J A, J W Munsey, A G Teague, et al. A Program for FocalMechanism Determ ination by Combined U se of Polarity and SV2P Amp litude Ratio Data. Earthquake Notes, 1984, 55 ( 3) : 15 [ 15 ] Holland J H. Adap tation in Natural and A rtificial System s. University of M ichigan Press, Ann A rbor [ 16 ] Moya A, J Aguirre and K Irikura. Inversion of Source Parameters and Site Effects From Strong Ground2motion Records U sing Genetic A lgorithm s. BSSA, 2000, 90 ( 4) : [ 17 ] J in A, C A Moya and M Ando. Simultaneous Determ ination of Site Responses and Source Parameters of Small Earthquakes A long the A totsugawa Fault Zone, Central Japan, BSSA, 2000, 90 (6) : [ 18 ] Chen S Z and GM A tkinson. Global Comparasions of Earthquake Source Spectra. BSSA, 2002, 92 (3) : [ 19 ] M iyake H, T Iwata and K Irikura. Estimation of Rup ture Propagation D irection and Strong Motion Generation A rea From Azimuth and D istance Dependence of Source Amp litude Spectra. GRL, 2001, 28 ( 4) : [ 20 ] Yoshihiro H, Yamanaka H, Tadokoro K, et al. Scaling Law Between Corner Frequency and Seism icmoment of M icroearthquakes: 5224 Is the B reakdown of the Cube Law a Nature of Earthquakes? GRL, 2002, 29 (8) : 5221 Rev iew of the Recen t Study on Earthquake Sources Abroad Zhu Y uanq ing Song Zh ip ing and Zhao Zh iguang ( Earthquake Adm inistration of Shanghai M unicipality, Shanghai, , China) Abstract In this paper, we introduce the recent study abroad on the app lication of array/net2 work data to source param eter study, the global comparison of earthquake source spectra, the direc2 tion of earthquake rup ture p ropagation, the app lication of genetic algorithm s to source parameter study, the discussion on seism ic moment, corner frequency, focal dep th, stress drop and source model, as well as the recent developm ent in the determ ination of first2motion focal mechanism, and also make some comments on some research results. Key words earthquake source; array/network; source spectra; source parameter