Rupture process of the 2004 Sumatra-Andaman earthquake
Rupture process of the 2004 Sumatra-Andaman earthquake
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DOI：
10.1126/science.1112260
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发表时间：
2005-05-20
期刊：
影响因子：
56.9
通讯作者：
Wald, D
中科院分区：
文献类型：
--
作者：
Ammon, CJ;Ji, C;Wald, D
2004 年 12 月 26 日的苏门答腊-安达曼地震缓慢发生，前 40 至 60 秒内滑动较小，破裂速度较慢。随后破裂以每秒约2.5公里的速度向北西北方向扩展，沿安达曼海槽延伸1200至1300公里。沿着苏门答腊岛西北部和尼科巴群岛南部近海 600 公里的板块边界，峰值位移达到了约 15 米。余震区北部 400 至 500 公里处的滑动较少，该区域至少有一些滑动可能发生在地震带之外的时间尺度上。
The 26 December 2004 Sumatra-Andaman earthquake initiated slowly, with small slip and a slow rupture speed for the first 40 to 60 seconds. Then the rupture expanded at a speed of about 2.5 kilometers per second toward the north northwest, extending 1200 to 1300 kilometers along the Andaman trough. Peak displacements reached similar to 15 meters along a 600-kilometer segment of the plate boundary offshore of northwestern Sumatra and the southern Nicobar islands. Slip was less in the northern 400 to 500 kilometers of the aftershock zone, and at least some slip in that region may have occurred on a time scale beyond the seismic band.