scholarly journals Slip History of the 1995 Kobe, Japan, Earthquake Determined from Strong Motion, Teleseismic, and Geodetic Data.

1996 ◽  
Vol 44 (5) ◽  
pp. 489-503 ◽  
Author(s):  
David J. Wald
Keyword(s):  
Strong Motion ◽  
Geodetic Data ◽  
Slip History ◽  
History Of

scholarly journals The slip history of the 1994 Northridge, California, earthquake determined from strong-motion, teleseismic, GPS, and leveling data

1996 ◽  
Vol 86 (1B) ◽  
pp. S49-S70 ◽  
Author(s):  
David J. Wald ◽  
Thomas H. Heaton ◽  
K. W. Hudnut
Keyword(s):  
Strong Motion ◽  
Geodetic Data ◽  
Body Waves ◽  
Dislocation Model ◽  
Data Sets ◽  
Frequency Content ◽  
Motion Velocity ◽  
S Wave ◽  
Waveform Data ◽  
Slip History

Abstract We present a rupture model of the Northridge earthquake, determined from the joint inversion of near-source strong ground motion recordings, P and SH teleseismic body waves, Global Positioning System (GPS) displacement vectors, and permanent uplift measured along leveling lines. The fault is defined to strike 122° and dip 40° to the south-southwest. The average rake vector is determined to be 101°, and average slip is 1.3 m; the peak slip reaches about 3 m. Our estimate of the seismic moment is 1.3 ± 0.2 × 1026 dyne-cm (potency of 0.4 km3). The rupture area is small relative to the overall aftershock dimensions and is approximately 15 km along strike, nearly 20 km in the dip direction, and there is no indication of slip shallower than about 5 to 6 km. The up-dip, strong-motion velocity waveforms are dominated by large S-wave pulses attributed to source directivity and are comprised of at least 2 to 3 distinct arrivals (a few seconds apart). Stations at southern azimuths indicate two main S-wave arrivals separated longer in time (about 4 to 5 sec). These observations are best modeled with a complex distribution of subevents: The initial S-wave arrival comes from an asperity that begins at the hypocenter and extends up-dip and to the north where a second, larger subevent is centered (about 12 km away). The secondary S arrivals at southern azimuths are best fit with additional energy radiation from another high slip region at a depth of 19 km, 8 km west of the hypocenter. The resolving power of the individual data sets is examined by predicting the geodetic (GPS and leveling) displacements with the dislocation model determined from the waveform data, and vice versa, and also by analyzing how well the teleseismic solution predicts the recorded strong motions. The general features of the geodetic displacements are not well predicted from the model determined independently from the strong-motion data; likewise, the slip model determined from geodetic data does not adequately reproduce the strong-motion characteristics. Whereas a particularly smooth slip pattern is sufficient to satisfy the geodetic data, the strong-motion and teleseismic data require a more heterogeneous slip distribution in order to reproduce the velocity amplitudes and frequency content. Although the teleseismic model can adequately reproduce the overall amplitude and frequency content of the strong-motion velocity recordings, it does a poor job of predicting the geodetic data. Consequently, a robust representation of the slip history and heterogeneity requires a combined analysis of these data sets.

scholarly journals Slip history of the 2003 San Simeon earthquake constrained by combining 1-Hz GPS, strong motion, and teleseismic data

2004 ◽  
Vol 31 (17) ◽  
pp. n/a-n/a ◽  
Author(s):  
Chen Ji ◽  
Kristine M. Larson ◽  
Ying Tan ◽  
Kenneth W. Hudnut ◽  
Kyuhong Choi
Keyword(s):  
Strong Motion ◽  
Teleseismic Data ◽  
Slip History ◽  
History Of

QUATERNARY SLIP HISTORY OF THE SANTA SUSANA FAULT, WESTERN TRANSVERSE RANGES, CALIFORNIA

2019 ◽  
Author(s):  
Reed J. Burgette ◽  
◽  
Jonathan J. Ingram ◽  
Michael P. Reed ◽  
Katherine M. Scharer ◽  
...  
Keyword(s):  
Transverse Ranges ◽  
Slip History ◽  
History Of

Initiation and Long-Term Slip History of the Altyn Tagh Fault

2001 ◽  
Vol 43 (12) ◽  
pp. 1087-1093 ◽  
Author(s):  
Yongjun Yue ◽  
Bradley D. Ritts ◽  
Stephan A. Graham
Keyword(s):  
Altyn Tagh Fault ◽  
Altyn Tagh ◽  
Slip History ◽  
History Of

scholarly journals Estimation of the Rupture History of the 2008 Mw8.0 Wenchuan Earthquake by Joint Inversion of Teleseismic and Strong-Motion Records

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Deyu Yin ◽  
Yun Dong ◽  
Qifang Liu ◽  
Yuexin She ◽  
Jingke Wu ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Strong Motion ◽  
Inversion Method ◽  
Near Surface ◽  
Strong Motion Records ◽  
The Wenchuan Earthquake ◽  
Finite Fault ◽  
History Of ◽  
Beichuan Fault ◽  
Dip Angle

In order to reproduce the rupture history of the 2008 Mw8.0 Wenchuan earthquake, the teleseismic and strong-motion records are adopted. Based on a multiple-segment, variable-slip model, the finite fault inversion method is utilized to recover the rupture process. The results are as follows: (1) the rupture duration of the Wenchuan earthquake is about 100 s, and the released seismic moment is 1.24 × 1021 N·m, equal to the moment magnitude Mw8.0. There are 5 asperities on the fault plane, indicating that the earthquake is composed of at least 5 subevents. (2) The slip is mainly distributed on the Beichuan fault, indicating that the Beichuan fault is the main rupture fault. On the southern part of the Beichuan fault, the dislocation underside the Longmenshan area and Hongkou-Yingxiu near-surface area is dominated by thrust, and the maximum slip is 11.8 m. Slip between the Yuejiashan and Qingping area is dominated by thrust. On the northern part of the Beichuan fault, the area under Beichuan is dominated by thrust, the slip under Nanba is thrust and strike, near Qingchuan, the slip turns into the strike slip, and the maximum slip is 13.1 m. The dislocation under Bailu is also dominated by thrust, with maximum slip 8.9 m. (3) The rupture of the Wenchuan earthquake is mainly a unilateral rupture to the northeast. The rupture started at the low dip angle part of the Beichuan fault, and after 3 s, it propagated to the Pengguan fault. After 10 s, the largest asperity under Longmenshan in the south section of the Beichuan fault began to break, lasting for about 24 s. Then, the Xiaoyudong fault was triggered by the Pengguan fault, and the bilateral rupture of the high dip angle part of the Beichuan fault started at about 6 s. South section of the Beichuan fault began to break at about 35 s, and at 43 s, 63 s, and 80 s, the rupture extended to Beichuan, Nanba, and Qingchuan areas.

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