Fault size and depth extent of the Ecuador earthquake (Mw 7.8) of 16 April 2016 from teleseismic and tsunami data
Fault size and depth extent of the Ecuador earthquake (Mw 7.8) of 16 April 2016 from teleseismic and tsunami data
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根据远震和海啸数据得出 2016 年 4 月 16 日厄瓜多尔地震（兆瓦 7.8）的断层大小和深度范围
DOI：
10.1002/2017gl072545
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发表时间：
2017
影响因子：
5.2
通讯作者：
Tatsuhiko Saito
中科院分区：
文献类型：
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作者：
M. Heidarzadeh;S. Murotani;K. Satake;T. Takagawa;Tatsuhiko Saito
2016年4月厄瓜多尔7.8级地震是自1979年以来厄瓜多尔-哥伦比亚俯冲带沿着的第一次大规模海啸地震（8.2级，200人死于海啸）。虽然2016年地震没有造成海啸破坏，但深海海啸评估和报告以及验潮仪记录到了小型海啸。在这里，我们设计了各种断层模型，有和没有浅滑区，并比较计算的海啸和海啸波形与观测。虽然海啸反演对包含或排除浅滑动无关紧要，但海啸波形强烈支持无浅滑动的滑动模型。我们最终的滑动模型的深度范围为15-44公里，其西部最浅的极限位于距离海沟约60公里处。最大和平均滑动分别为2.5和0.7米。在15-35 km深度范围内，大滑移区为80 km（沿着走向）× 60 km（沿着倾向）。
The April 2016 Ecuador Mw 7.8 earthquake was the first megathrust tsunamigenic earthquake along the Ecuador‐Colombia subduction zone since 1979 (Mw 8.2 with 200 deaths from tsunami). While there was no tsunami damage from the 2016 earthquake, small tsunamis were recorded at Deep‐ocean Assessment and Reporting of Tsunami and tide gauges. Here we designed various fault models with and without shallow‐slip area and compared the computed teleseismic and tsunami waveforms with the observations. While teleseismic inversions were indifferent about inclusion or exclusion of the shallow slip, tsunami waveforms strongly favored the slip model without shallow slip. Our final slip model has a depth range of 15–44 km, and its western shallowest limit is located at the distance of ~60 km from the trench. Maximum and average slips were 2.5 and 0.7 m, respectively. The large‐slip area was 80 km (along strike) × 60 km (along dip) in the depth range of 15–35 km.