气候变化领域集成服务门户(CCPortal): Observations and modeling of the elastogravity signals preceding direct seismic waves

CCPortal

DOI	10.1126/science.aao0746
	Observations and modeling of the elastogravity signals preceding direct seismic waves
	Vallée M.; Ampuero J.P.; Juhel K.; Bernard P.; Montagner J.-P.; Barsuglia M.
发表日期	2017
ISSN	0036-8075
起始页码	1164
结束页码	1168
卷号	358 期号:6367
英文摘要	After an earthquake, the earliest deformation signals are not expected to be carried by the fastest (P) elastic waves but by the speed-of-light changes of the gravitational field. However, these perturbations are weak and, so far, their detection has not been accurate enough to fully understand their origins and to use them for a highly valuable rapid estimate of the earthquake magnitude. We show that gravity perturbations are particularly well observed with broadband seismometers at distances between 1000 and 2000 kilometers from the source of the 2011, moment magnitude 9.1, Tohoku earthquake. We can accurately model them by a new formalism, taking into account both the gravity changes and the gravity-induced motion. These prompt elastogravity signals open the window for minute time-scale magnitude determination for great earthquakes. © 2017, American Association for the Advancement of Science. All rights reserved.
英文关键词	deformation mechanism; detection method; earthquake magnitude; gravity field; gravity survey; numerical model; observational method; seismic wave; Tohoku earthquake 2011; acceleration; Article; earthquake; gravity; Japan; model; priority journal; seismic wave; simulation; time; waveform; article; earthquake; gravity; motion
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245817
作者单位	Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, CNRS, France; Seismological Laboratory, California Institute of Technology, Pasadena, CA, United States; AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, Commissariat à l’Energie Atomique et aux Energies Alternatives, Irfu, Observatoire de Paris, Sorbonne Paris Cité, France
推荐引用方式 GB/T 7714	Vallée M.,Ampuero J.P.,Juhel K.,et al. Observations and modeling of the elastogravity signals preceding direct seismic waves[J],2017,358(6367).
APA	Vallée M.,Ampuero J.P.,Juhel K.,Bernard P.,Montagner J.-P.,&Barsuglia M..(2017).Observations and modeling of the elastogravity signals preceding direct seismic waves.Science,358(6367).
MLA	Vallée M.,et al."Observations and modeling of the elastogravity signals preceding direct seismic waves".Science 358.6367(2017).