Remote Triggering of the M w 6.9 Hokkaido Earthquake as a Result of the Mw 6.6 Indonesian Earthquake on September 11, 2008
Remote Triggering of the M w 6.9 Hokkaido Earthquake as a Result of the Mw 6.6 Indonesian Earthquake on September 11, 2008
复制标题
2008年9月11日印度尼西亚6.6级地震远程引发北海道6.9级地震
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Cheng‐Horng Lin
中科院分区：
文献类型：
--
作者：
Cheng‐Horng Lin
直到最近，遥远的地震引发地震的现象才得到了充分的证实。然而，大多数触发地震仅限于小地震（M < 3）。此外，地震的确切触发机制仍不清楚。在这里，我展示了一次强烈地震（Mw = 6.6）如何能够在遥远的距离（~4750公里）引发另一次地震（Mw = 6.9）。2008年9月11日，印度尼西亚和日本在大约21分钟的时间内分别发生了两场震级分别为6.6和6.9的强烈地震。仔细检查日本记录的宽带地震仪显示，北海道地震发生的时间正好是印度尼西亚地震产生的表面波到达的时间。虽然在北海道地震震源处估计的峰值动应力刚刚达到一般触发地震能力的下限，但一种更合理的触发地震的机制可能是流体渗透改变断层性质。这些观测结果表明，北海道地震可能是由印度尼西亚地震产生的表面波从遥远的距离引发的。如果能观察到更多的情况，将来可能会关注强震之间可能相互作用的时间警告。
Only just recently, the phenomenon of earthquakes being triggered by a distant earthquake has been well established. Yet, most of the triggered earthquakes have been limited to small earthquakes (M < 3). Also, the exact triggering mechanism for earthquakes is still not clear. Here I show how one strong earthquake (Mw = 6.6) is capable of triggering another (Mw = 6.9) at a remote distance (~4750 km). On September 11, 2008, two strong earthquakes with magnitudes (Mw) of 6.6 and 6.9 hit respectively in Indonesia and Japan within a short interval of ~21 minutes time. Careful examination of broadband seismograms recorded in Japan shows that the Hokkaido earthquake occurred just as the surface waves generated by the Indonesia earthquake arrived. Although the peak dynamic stress estimated at the focus of the Hokkaido earthquake was just reaching the lower bound for the capability of triggering earthquakes in general, a more plausible mechanism for triggering an earthquake might be attributed to the change of a fault property by fluid infiltration. These observations suggest that the Hokkaido earthquake was likely triggered from a remote distance by the surface waves generated from the Indonesia earthquake. If some more cases can be observed, a temporal warning of possible interaction between strong earthquakes might be concerned in the future.
DOI：
10.1186/bf03352510
发表时间：
2004-05
期刊：
Earth, Planets and Space
影响因子：
--
作者：
Sachiko Tanaka;M. Ohtake;H. Sato
通讯作者：
Sachiko Tanaka;M. Ohtake;H. Sato
影响因子：
56.9
作者：
Cochran, ES;Vidale, JE;Tanaka, S
通讯作者：
Tanaka, S