中科大地球与行星物理学术报告通知-Clifford Thurber
报告地点：教学行政楼706会议室
报告时间：2025 年 4 月 25 日(周五) 15:00-16:30
报告人：Clifford Thurber (University of Wisconsin-Madison)
报告人简介：
Clifford Thurber 教授是 University of Wisconsin-Madison 地球科学系荣退教授，主要从事地震层析成像研究，是国际 著名的地震层析成像专家，研究对象包括俯冲带、断层区、 火山、地热田等，并致力于利用地震学与大地测量学观测联 合研究地震震源参数。已发表 140 余篇学术论文，获 DOE， DOD，NSF，USGS 等 70 余次项目资助，领导了 19 项地震 观测项目，并长期在 IRIS，EarthScope，GeoPRISMS 等学 术组织任职，组织召集多次学术专题会议。曾任 JGR Associate Editor 和 NSF，USGS，PASSCAL 等项目评审委 员会成员，2010 年被选为 AGU Fellow，2012 年获 UW-Madison Vilas Distinguished Achievement Professor Award。
报告题目：Spatiotemporal Trends in Microseismic Activity Triggered by Plant Shutdowns at San Emidio, Nevada
报告内容简介
Many geothermal power plants induce seismicity near injection wells when they are operating, but a small
but increasing number of them have been found to have seismicity induced near production wells by shutdowns
(shut-ins), presumably due to pore pressure and/or poroelastic stress increases. A very dense seismic array
deployed at about 1,300 sites by Microseismic, Inc. in 2016 at the San Emidio geothermal plant during a brief
(~1 day) shutdown located about 130 discrete events (microseismic events) using a back-projection method
during the shutdown. As part of a multi-institutional, multi-disciplinary project known as WHOLESCALE, a
dense array of 450 3-component nodal instruments was deployed in 2022 for about a month to record data before,
during, and after shutdown, covering part of the area of the 2016 array. I will discuss some of the key finding
from those two data sets. We compare in some detail the fault patches that were activated in 2016 versus 2022
compared to the fault model developed for San Emidio. We also pose a few questions of interest, some of which
we hope to answer eventually.