Rapid automated W-phase slip inversion for the Illapel great earthquake (2015, Mw=8.3)
Rapid automated W-phase slip inversion for the Illapel great earthquake (2015, Mw=8.3)
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DOI：
10.1002/2015gl067418
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发表时间：
2016-03-16
影响因子：
5.2
通讯作者：
Dettmer, Jan
中科院分区：
文献类型：
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作者：
Benavente, Roberto;Cummins, Phil R.;Dettmer, Jan
我们对2015年Illapel大地震（M-w = 8.3）进行了快速W相有限断层反演。为了评估在接近真实的时间背景下反演的性能，我们将地震台站分为四组。这些小组认为，震中距离分别为30度、50度、75度和90度。第一组的结果可以在起始时间后25分钟内获得，最后一组的结果可以在1小时内获得。四个结果一致显示，在海沟附近，海沟垂直倾角的峰值滑动约为10 m，这与该事件的海啸成因一致。滑动位置与美国地质调查局的初步解决方案相似。反演是自动的，并在事件发生后25分钟内提供有意义的结果。这使得该方法特别适用于区域和远程海啸的应急管理和预警。
We perform rapid W-phase finite fault inversion for the 2015 Illapel great earthquake (M-w = 8.3). To evaluate the performance of the inversion in a near real time context, we divide seismic stations into four groups. The groups consider stations up to epicentral distances of 30 degrees, 50 degrees, 75 degrees, and 90 degrees, respectively. The results for the first group could have been available within 25min after the origin time and the results for the last group within 1h. The four results consistently show a peak slip of approximate to 10m near the trench with trench perpendicular rake which is consistent with the tsunami genesis of the event. The slip location is similar to that in the preliminary U.S. Geological Survey solution. The inversion is automated and provides meaningful results within 25min after the event. This makes the method particularly suited to emergency management and early warning at regional and teletsunami distances.