A Seismic Study of Subducted Lithosphere

9316012陈，W-P本研究是俯冲岩石圈力学状态及其与周围地幔相互作用研究的继续。近年来，日本伊豆-博宁俯冲带和琉球-九州弧区深部地震频发，具有高质量的宽带地震记录。这项研究涉及对这些地区深度超过100公里的大约35个大中型地震的破裂过程进行精确确定。这项工作还将涉及对这些事件的旅行时间残差和体波脉冲宽度/幅度异常的模式的调查。这一结果将涉及深部地震的起源和俯冲板块的穿透深度问题。***

9316012 Chen, W-P This research is a continuation of investigation of the mechanical state of the subducted lithosphere and its interaction with the surrounding mantle. Deep earthquakes in subduction zones of Izu-Bonin, Japan, and Ryukyu-Kyushu arcs have been numerous recently and have high-quality broad-band seismic recordings. This research involves precise determination of the rupture processes for approximately 35 large to moderate-sized events deeper than 100 km in these zones. The work will also involve investigation of the patterns of travel-time residuals and anomalies in pulse- width/amplitude of body waves from these events. The results will bear on questions of the origin of deep earthquakes and the depth of penetration of the subducted slab. ***