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

这项研究是密苏里州圣路易斯华盛顿大学和北卡罗来纳州罗利北卡罗来纳州立大学的研究人员合作进行的。这笔资金将支持在汤加、斐济和瓦努阿图地区利用IRIS大学联盟管理的pascal便携式地震设备进行被动地震实验。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，方法是利用板块上部界面的相位转换、板块向上传播的相位分散以及板块内外传播的相位之间的传播时间比较。利用区域地震和远震分裂的SKS来研究弧后盆地的构造。该研究将完善世界上最活跃的深地震带深部地震源过程的信息，并为深板、浅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.