2004年12月26日印尼北苏门答腊以西近海M_W9.0地震与地震的类临界点模型被引量：7

THE DECEMBER 26, 2004, OFF THE WEST COAST OF NOR-THERN SUMATRA, INDONESIA, M_W=9.0, EARTHQUAKE AND THE CRITICAL-POINT-LIKE MODEL OF EARTHQUAKE PREPARATION

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摘要使用哈佛CMT资料,研究了2004年12月26日印尼北苏门答腊以西近海MW9.0地震前的长期地震活动.这次地震前,在1/4世纪的时间尺度、1500km的空间尺度上,存在加速矩释放(AMR)现象.在这一空间尺度范围内,MW9.0地震仍落在分段的幂律分布上.因此,从地震的类临界点模型的角度考虑,对这次特大地震的发生和地震的大小既无预测、亦无预报的情况,并非由物理上的“不可预测性”所致. Long-term seismic activity prior to the December 26, 2004, off the west coast of northern Sumatra, Indonesia, M_W=9.0 earthquake was investigated using the Harvard CMT catalogue. It is observed that before this great earthquake, there exists an accelerating moment release (AMR) process with the temporal scale of a quarter century and the spatial scale of 1 500 km. Within this spatial range, the M_W=9.0 event falls into the piece-wise power-law-like frequency-magnitude distribution. Therefore, in the perspective of the critical-point-like model of earthquake preparation, the failure to forecast/predict the approaching and/or the size of this earthquake is not due to the physically intrinsic unpredictability of earthquakes.

作者蒋长胜吴忠良

机构地区中国地震局地球物理研究所

出处《地震学报》 CSCD 北大核心 2005年第3期269-275,共7页 Acta Seismologica Sinica

基金国家科技部项目(2004CB418406)资助.

关键词印尼北苏门答腊以西近海Mw9.0地震加速矩释放(AMR)现象幂律分布地震的类临界点模型 the 2004 off the west coast of northern Sumatra M_W=9.0 earthquake accelerating moment release (AMR) before earthquakes power-law-like frequency-magnitude distribution critical-point-like model of earthquake preparation

分类号 P315.75 [天文地球—地震学]

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