The size and duration of the Sumatra-Andaman earthquake from far-field static offsets

被引：180

作者：

Banerjee, P

Pollitz, FF

Bürgmann, R

机构：

[1] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Berkeley Seismol Lab, Berkeley, CA 94720 USA

[3] Wadia Inst Himalayan Geol, Dehra Dun 248001, Uttar Pradesh, India

[4] US Geol Survey, Menlo Pk, CA 94025 USA

来源：

SCIENCE | 2005年 / 308卷 / 5729期

关键词：

D O I：

10.1126/science.1113746

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The 26 December 2004 Sumatra earthquake produced static offsets at continuously operating GPS stations at distances of up to 4500 kilometers from the epicenter. We used these displacements to model the earthquake and include consideration of the Earth's shape and depth-varying rigidity. The results imply that the average slip was >5 meters along the full length of the rupture, including the similar to 650-kilometer-long Andaman segment. Comparison of the source derived from the far-field static offsets with seismically derived estimates suggests that 25 to 35% of the total moment release occurred at periods greater than 1 hour. Taking into consideration the strong dip dependence of moment estimates, the magnitude of the earthquake did not exceed M-w = 9.2.

引用

页码：1769 / 1772

页数：4

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