Investigation of Upper Plate Response to Subducting Plate Morphology and Seamounts as Subduction Zone Asperities: Cooperative German, Costa Rican, and United States Project

[4020 . 91]这项研究将探讨大洋板块俯冲的表面形态对其上覆大陆板块的结构和地震活动性的影响。它将使用陆基和海基地震来检查科科斯板块的三个区域的横断面，这些区域选择了不同的形态：一个平滑，一个有许多海山，一个有科科斯山脊。一个主要的目标是测试最近的一个理论，即海底山是地震集中的地点（“陡岩”）。海底山主导地区的海底地震仪网格将用于研究这一主题。＊＊＊

9402091 McIntosh This study will investigate the effect of the surface morphology of a subducting oceanic plate upon the structure and seismicity of the over-riding continental plate. It will use land- and sea-based seismics to examine transects over three regions of the Cocos plate chosen for their different morphology: one smooth, one with numerous seamounts, and one bearing the Cocos Ridge. A primary goal is to test a recent theory that seamounts serve as sites for concentration of earthquakes ("asperities"). A grid of OBS's in the seamount-dominated region will be used to examine this topic. ***