globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2038
论文题名:
Nicoya earthquake rupture anticipated by geodetic measurement of the locked plate interface
作者: Protti M.; González V.; Newman A.V.; Dixon T.H.; Schwartz S.Y.; Marshall J.S.; Feng L.; Walter J.I.; Malservisi R.; Owen S.E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:2
起始页码: 117
结束页码: 121
语种: 英语
Scopus关键词: coseismic process ; deformation ; earthquake magnitude ; earthquake rupture ; geodesy ; geomorphological mapping ; GPS ; plate boundary ; seismic method ; subduction zone ; Costa Rica ; Nicoya Peninsula
英文摘要: The Nicoya Peninsula in Costa Rica is one of the few places on Earth where the seismically active plate interface of a subduction zone is directly overlaid by land rather than ocean. At this plate interface, large megathrust earthquakes with magnitudes greater than 7 occur approximately every 50 years. Such quakes occurred in 1853, 1900 and 1950, so another large earthquake had been anticipated. Land-based Global Positioning System (GPS) and seismic measurements revealed a region where the plate interface was locked and hence accumulated seismic strain that could be released in future earthquakes. On 5 September 2012, the long-anticipated Nicoya earthquake occurred in the heart of the previously identified locked patch. Here we report observations of coseismic deformation from GPS and geomorphic data along the Nicoya Peninsula and show that the magnitude 7.6 Nicoya earthquake ruptured the lateral and down-dip extent of the previously locked region of the plate interface. We also identify a previously locked part of the plate interface, located immediately offshore, that may not have slipped during the 2012 earthquake, where monitoring should continue. By pairing observations of the spatial extent of interseismic locking and subsequent coseismic rupture, we demonstrate the use of detailed near-field geodetic investigations during the late interseismic period for identifying future earthquake potential. © 2014 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106446
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Observatorio Vulcanológico y Sismológico de Costa Rica (OVSICORI), Universidad Nacional, Apartado 1718-3000, Heredia 3000, Costa Rica; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332-0340, United States; Department of Geology, University of South Florida, 4202 E Fowler Ave, Tampa, FL 33620, United States; Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States; Geological Sciences Department, Cal Poly Pomona, 3801 West Temple Ave., Pomona, CA 91768, United States; Earth Observatory of Singapore, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore; Jet Propulsion Laboratory, MS 238-600, 4800 Oak Grove Drive, Pasadena, CA 91109, United States

Recommended Citation:
Protti M.,González V.,Newman A.V.,et al. Nicoya earthquake rupture anticipated by geodetic measurement of the locked plate interface[J]. Nature Geoscience,2014-01-01,7(2)
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