Rapid aseismic moment release following the 5 December, 1997 Kronotsky, Kamchatka, earthquake

被引:69
作者
Bürgmann, R
Kogan, MG
Levin, VE
Scholz, CH
King, RW
Steblov, GM
机构
[1] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
[2] Lamont Doherty Earth Observ, Palisades, NY 10964 USA
[3] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA
[4] Kamchatka GPS Ctr KOMSP, Petropavlovsk Kamchatski, Russia
[5] DAAC GSRAS, Moscow, Russia
关键词
D O I
10.1029/2000GL012350
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Model inversions of displacements of continuously operating GPS stations in Kamchatka show that aseismic afterslip during 2 months following the M-omega=7.8, 5 December, 1997 Kronotsky subduction earthquake released as much moment as the earthquake itself. The rapidly decaying transient slip on the subduction underthrust occurred near the downdip edge of the coseismic rupture and extended laterally away from it, including a region of vigorous foreshock activity. A logarithmic decay function fit to the cumulative afterslip curve has a relaxation time of about 3 days. Rapid afterslip can contribute significantly to the moment release of partially coupled subduction zones.
引用
收藏
页码:1331 / 1334
页数:4
相关论文
共 17 条
[1]   Postseismic strain following the 1989 Loma Prieta earthquake from GPS and leveling measurements [J].
Burgmann, R ;
Segall, P ;
Lisowski, M ;
Svarc, J .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1997, 102 (B3) :4933-4955
[2]   Centroid-moment tensor solutions for October-December, 1997 [J].
Dziewonski, AM ;
Ekström, G ;
Maternovskaya, NN .
PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1998, 109 (3-4) :93-105
[3]  
FEDOTOV SA, 1999, VOLCANOLOGY SEISMOLO, V20, P597
[4]   Seismicity and structure of the Kamchatka subduction zone [J].
Gorbatov, A ;
Kostoglodov, V ;
Suarez, G ;
Gordeev, E .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1997, 102 (B8) :17883-17898
[5]  
GORDEEV E, 1999, EOS T AGU, V80, P948
[6]   Silent fault slip following an interplate thrust earthquake at the Japan Trench [J].
Heki, K ;
Miyazaki, S ;
Tsuji, H .
NATURE, 1997, 386 (6625) :595-598
[7]   A slow thrust slip event following the two 1996 Hyuganada earthquakes beneath the Bungo Channel, southwest Japan [J].
Hirose, H ;
Hirahara, K ;
Kimata, F ;
Fujii, N ;
Miyazaki, S .
GEOPHYSICAL RESEARCH LETTERS, 1999, 26 (21) :3237-3240
[8]   Geodetic constraints on the rigidity and relative motion of Eurasia and North America [J].
Kogan, MG ;
Steblov, GM ;
King, RW ;
Herring, TA ;
Frolov, DI ;
Egorov, SG ;
Levin, VY ;
Lerner-Lam, A ;
Jones, A .
GEOPHYSICAL RESEARCH LETTERS, 2000, 27 (14) :2041-2044
[9]   ON THE MECHANICS OF EARTHQUAKE AFTERSLIP [J].
MARONE, CJ ;
SCHOLTZ, CH ;
BILHAM, R .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1991, 96 (B5) :8441-8452
[10]   Full interseismic locking of the Nankai and Japan-west Kurile subduction zones: An analysis of uniform elastic strain accumulation in Japan constrained by permanent GPS [J].
Mazzotti, S ;
Le Pichon, X ;
Henry, P ;
Miyazaki, S .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2000, 105 (B6) :13159-13177