Collaborative Research: A Passive Broadband Seismic Experiment for Study of Subduction Zone and Back-Arc Structure and Tectonics in the Southwest Pacific

这项研究是密苏里州圣路易斯的华盛顿大学和北卡罗来纳州罗利市的北卡罗来纳州立大学的研究人员合作的。这笔资金将支持在汤加、斐济和瓦努阿图地区利用由IRIS大学联盟管理的PASSCAL便携式地震设备进行的被动地震实验。世界各地发生的地震将被记录下来，以研究俯冲板块的结构，使用在上部板块界面上转换的相位，沿板块向上传播的相位的分散，以及板块内外传播相之间的旅行时间比较。将利用区域地震和来自远震的SKS分裂来研究弧后盆地的结构。这项研究将改善世界上最活跃的深部地震带深部地震的震源过程信息，并对深部板块、浅部海沟和弧后盆地区域的构造提供更好的约束。

This research is a collaboration between investigators at Washington University, Saint Louis, Missouri, and North Carolina State University, Raleigh, North Carolina. The funding will support a passive seismic experiment utilizing the PASSCAL portable seismic equipment, managed by the IRIS university consortium, in the Tonga, Fiji, and Vanuatu regions. Earthquakes occurring throughout the world will be recorded to study the structure of subducting slabs using phases converted at the upper slab interface, dispersion of phases traveling up the slab, and comparison of travel times between phases traveling inside and outside of the slab. The structure of the back arc basin will be studied utilizing regional earthquakes and SKS splitting from teleseisms. This study will improve information about the source processes of deep earthquakes in the most active deep seismic zone in the world, as well as provide better constraints on the tectonics of the deep slab, shallow trench and back-arc basin regions.