Aftershock locations and rupture characteristics of the 1995 Mariana Deep Earthquake
Aftershock locations and rupture characteristics of the 1995 Mariana Deep Earthquake
复制标题
1995年马里亚纳深震的余震位置及破裂特征
DOI：
10.1029/2001gl013059
复制
发表时间：
2001
影响因子：
5.2
通讯作者：
J. Hildebrand
中科院分区：
文献类型：
--
作者：
R. Tibi;D. Wiens;J. Hildebrand
1995年8月23日(Mw=7.0，深度586公里)马里亚纳地震产生了已知的最强烈的深震余震序列之一。我们结合了远震到达时间和马里亚纳群岛震中正上方的当地地震台网的到达时间，并重新定位了主震和余震。我们通过对全球地震台网的波形数据进行反演，从远震体波中提取了震源特征。主震沿着一个向西南倾斜的平面，沿着活动板块的整个宽度向下破裂。在17次位置良好的余震中，大多数发生在破裂面沿线或非常近的地方。主震和余震的不同震源机制表明，1995年8月序列区域的应力场沿马里亚纳板的宽度变化。
The August 23, 1995 (Mw=7.0, depth 586 km) Mariana event produced one of the strongest deep earthquake aftershock sequences known. We combined teleseismic arrival times with arrival times picked from a local network operating directly above the event in the Mariana Islands, and relocated the main shock and aftershocks. We derived the source characteristics from teleseismic body waves by inverting waveform data of the Global Seismograph Network. The main shock ruptured downward across the entire width of the active slab along a plane dipping southwestward. Most of the 17 well‐located aftershocks occurred along or very near the rupture plane. The different focal mechanisms of the main shock and aftershocks indicate that the stress field varies across the width of the Mariana slab at the area of the August 1995 sequence.