The 2006 aseismic slow slip event in Guerrero, Mexico: New results from GPS

The 2006 aseismic slow slip event in Guerrero, Mexico: New results from GPS
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2006 年墨西哥格雷罗州地震慢滑事件:GPS 的新结果

DOI:
10.1029/2007gl029912
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发表时间:
2007
影响因子:
5.2
通讯作者:
J. Santiago
J. Santiago
中科院分区:
地球科学1区
文献类型:
--
作者:
K. Larson;V. Kostoglodov;S. Miyazaki;J. Santiago

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墨西哥格雷罗的地壳变形测量是用连续的GPS仪器进行的。这个网络沿海岸横跨75公里,从海岸到墨西哥城横跨275公里,与中美洲海沟垂直。2006年4月至12月发生了一次大的地震滑动瞬变,在与地震间记录相反的方向上产生了近6厘米的水平位移。这一短暂滑动事件紧跟在格雷罗地区西北部发生的一系列约M5深板内事件之后。格雷罗GPS网络对水平和垂直位移进行了反演,以确定俯冲界面的滑动。利用一个能适应俯冲带几何形状变化的简单断层模型,发现滑动集中在内部断块上,并向东南方向传播。该滑动事件的最小等效毫瓦为7.5。
Crustal deformation measurements from Guerrero, Mexico were made with continuous GPS instrumentation. This network spans 75 km along the coast and a 275 km transect from the coast to Mexico City, which is perpendicular to the Middle America trench. A large aseismic slip transient occurred from April to December 2006, yielding horizontal displacements of nearly 6 cm in the direction opposite to that recorded interseismically. This transient slip episode closely follows a series of ∼M5 deep intraplate events that occurred in the northwestern portion of the Guerrero region. Both horizontal and vertical displacements are inverted for the Guerrero GPS network to determine slip along the subduction interface. Using a simple fault model that accommodates changes in the subduction zone geometry, it is found that slip is concentrated on interior fault patches, and propagated to the southeast. This slip event has a minimum equivalent Mw of 7.5.
DOI: 10.1029/2006gl028890
发表时间: 2007-02-15
影响因子: 5.2
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