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1992 Nicaragua earthquake : ウィキペディア英語版 | 1992 Nicaragua earthquake
The 1992 Nicaragua earthquake occurred off the coast of Nicaragua at 6:16 p.m. on September 2. Some damage was also reported in Costa Rica. At least 116 people were killed and several more were injured. The quake was located in an active zone of stress and deformation. It created tsunamis disproportionately large for its surface wave magnitude. ==Tectonics== The 1992 Nicaragua earthquake was the first tsunami earthquake to be captured on modern broadband seismic networks. The initial surface wave magnitude was estimated at 7.2. The shock occurred on the subduction interface between the Cocos and Caribbean Plates, an active zone of stress and deformation,〔 and due to the absence of sediment on the ocean floor off Nicaragua, the slip propagated up-dip all the way to the trench bottom, a creator of large tsunamis.〔 This occurrence of slip of a plate interface filled with soft subducted sediments caused the rupturing process to be slower than the average subduction zone thrust earthquakes〔 while the focus of the earthquake was much shallower than the typical subduction zone earthquake.〔
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