Imaging the Seismogenic Zone with Geodesy and Seismology: Two Land-Ocean Transects Across Costa Rica and the Middle America Trench

目前正在为横跨中美洲海沟和哥斯达黎加的一项为期三年、多机构、两样带的大地测量和地震实验提供资金，该实验位于俯冲的科科斯板块和翻覆的加勒比板块之间的发震界面正上方。pi将在陆地上操作GPS，水准和数字记录地震仪，并在海上部署海底地震仪（OBSs）。目标是绘制出发震带的三维分布和性质，以及产生大地震的锁定或部分锁定板块界面，以便与控制地震活动性分布和板块耦合的过程进行比较。在尼科亚和奥萨半岛地区，由于当地海岸线接近大地震产生的海沟轴，因此对孕震带的成像将得到增强。

Funds are being provided for a three year, multi-institutional, two-transect, geodetic and seismic experiment across the Middle America Trench and Costa Rica, immediately above the seismogenic interface between subducting Cocos and overriding Caribbean plates. The PIs will operate GPS, leveling, and digitally recording seismometers on land and deploy ocean bottom seismometers (OBSs) offshore. The goal is to map the three-dimensional distribution and nature of the seismogenic zone, the locked or the partly locked plate interface that generates large earthquakes, for comparison to processes that control the distribution of seismicity and plate coupling. The imaging of the seismogenic zone will be enhanced in the Nicoya and Osa peninsular region because of the close approach of local coastline to the trench axis where the large earthquakes are generated.