Gravity Satellite GRACE Detects Coseismic Gravity Changes Caused by 2010 Chile
详细信息
- 责任者：Zhou Xin (College of Earth Science ; Graduate University of Chinese Academy of Sciences ; Beijing 100049 ; China) ; Sun Wenke
- 刊名：Chinese Journal of Geophysics
- 出版年：2011
- 卷期：54(7)
- 关键词：重力场 ; gravity field ; 智利地震2010 ; Chile earthquake 2010 ; 智利 ; Chile
- 页码：p.1745-1749
- 图表：2 illus., 15 refs.
- 分类号：0500
- 出版序号：130
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
The study successfully processed GRACE data using de-correlation and 300km radius Gaussian smoothing and extracted the coseismic gravity changes caused by the 2010 Chile MwS. 8 earthquake. The peak to peak amplitude is 7μGal for gravity and the results agree well with that calculated using a dislocation theory for a spherical earth model. It is a new illustration of GRACE in detecting coseismic signals since it successfully detected the coseismic gravity changes caused by the 2004 Sumatra M9.3 earthquake. The result reported in this paper implies that GRACE is capable of detecting a coseismic signal caused by a magnitude M〈9.0 earthquake, and it is expected a wide application in studying seismic mechanism and other geophysical investigations.