Rupture evolution of the 2006 Java']Java tsunami earthquake and the possible role of splay faults

被引：24

作者：

Fan, Wenyuan ^{[1
,2
]}

Bassett, Dan ^{[1
,3
]}

Jiang, Junle ^{[1
]}

Shearer, Peter M. ^{[1
]}

Ji, Chen ^{[4
,5
]}

机构：

[1] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

[2] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA

[3] GNS Sci, Lower Hutt 5010, New Zealand

[4] UC Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA

[5] UC Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA

来源：

TECTONOPHYSICS | 2017年 / 721卷

基金：

美国国家科学基金会;

关键词：

Earthquake; Tsunami; Back-projection; Splay faults; !text type='Java']Java[!/text; Seismology; M-W-GREATER-THAN-OR-EQUAL-TO-7.0 MEGATHRUST EARTHQUAKES; HIGH-FREQUENCY RADIATION; W; 9.0; TOHOKU; SLIP; AFTERSHOCKS; VELOCITY; SEISMICITY; INVERSION; CRYOSAT-2; MODELS;

D O I：

10.1016/j.tecto.2017.10.003

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The 2006 Mw 7.8 Java earthquake was a tsunami earthquake, exhibiting frequency-dependent seismic radiation along strike. High-frequency global back-projection results suggest two distinct rupture stages. The first stage lasted similar to 65 s with a rupture speed of similar to 1.2 km/s, while the second stage lasted from similar to 65 to 150 s with a rupture speed of similar to 2.7 km/s. High-frequency radiators resolved with back-projection during the second stage spatially correlate with splay fault traces mapped from residual free-air gravity anomalies. These splay faults also colocate with a major tsunami source associated with the earthquake inferred from tsunami first-crest back-propagation simulation. These correlations suggest that the splay faults may have been reactivated during the Java earthquake, as has been proposed for other tsunamigenic earthquakes, such as the 1944 Mw 8.1 Tonankai earthquake in the Nankai Trough.

引用

页码：143 / 150

页数：8

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