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	Gravity changes observed between 2004 and 2009 near the tokai slow-slip area and prospects for detecting fluid flow during future slow-slip events
	Tanaka, Yoshiyuki1; Kato, Aitaro1; Sugano, Takayuki1; Fu, Guangyu2; Zhang, Xinlin1; Furuya, Masato3; Sun, Wenke4; Okubo, Shuhei1; Matsumoto, Shigeo5; Honda, Masaki6
刊名	Earth planets and space
	2010
卷号	62期号:12页码:905-913
关键词	Slow earthquake Slow slip Gravity Fluid Poroelasticity Permeability Subduction zone Crustal deformation
ISSN号	1343-8832
DOI	10.5047/eps.2010.11.003
通讯作者	Tanaka, yoshiyuki(y-tanaka@eri.u-tokyo.ac.jp)
英文摘要	Slow-slip events (sses) have been observed in many plate-boundary zones along the circum-pacific seismic belt. previous studies have revealed that high-pressure fluids supplied from the subducted oceanic plate can generate sses. however, the behavior of these fluids during an sse has not been fully elucidated. this paper discusses possible fluid migration along the plate boundary on the basis of spatiotemporal gravity changes observed by absolute and relative gravimeters during a long-term sse in the tokai district, japan. relative-gravity data are sometimes unreliable because of limited observation accuracies and possible noise produced by groundwater. nevertheless, the observed gravity changes show a systematic pattern of spatial changes over the slow-slip area. this pattern can be explained by a poroelastic model assuming fluid migration along the plate interface, for which an inversion indicates a permeability of about 10(-15) m(2). this lies within the range of permeability values inferred by other studies in slow-slip areas. long-term sses have occurred repeatedly in the tokai district. if the permeability remains greater than 10(-15) m(2) during a future sse, it will be possible to detect fluid migration by improving the observation accuracy to the 1-mu gal level and accurately evaluating groundwater-related noise.
WOS关键词	SUPERCONDUCTING GRAVIMETERS ; NEW-ZEALAND ; EARTHQUAKE ; PRESSURE ; JAPAN ; RECURRENCE ; RUPTURE ; CRUST ; ZONE
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
语种	英语
出版者	TERRA SCIENTIFIC PUBL CO
WOS记录号	WOS:000288180700001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2408808
专题	中国科学院大学
通讯作者	Tanaka, Yoshiyuki
作者单位	1.Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 1130032, Japan 2.China Earthquake Adm, Inst Earthquake Sci, Beijing 100036, Peoples R China 3.Hokkaido Univ, Grad Sch Sci, Dept Nat Hist Sci, Kita Ku, Sapporo, Hokkaido 0600810, Japan 4.Chinese Acad Sci, Grad Univ, Coll Earth Sci, Beijing 100049, Peoples R China 5.Sumiko Consultants Co Ltd, Drilling Technol Dept, Taito Ku, Tokyo 1100008, Japan 6.Geospatial Informat Author Japan, Dept Geodesy, Tsukuba, Ibaraki 3050811, Japan
推荐引用方式 GB/T 7714	Tanaka, Yoshiyuki,Kato, Aitaro,Sugano, Takayuki,et al. Gravity changes observed between 2004 and 2009 near the tokai slow-slip area and prospects for detecting fluid flow during future slow-slip events[J]. Earth planets and space,2010,62(12):905-913.
APA	Tanaka, Yoshiyuki.,Kato, Aitaro.,Sugano, Takayuki.,Fu, Guangyu.,Zhang, Xinlin.,...&Ishihara, Misao.(2010).Gravity changes observed between 2004 and 2009 near the tokai slow-slip area and prospects for detecting fluid flow during future slow-slip events.Earth planets and space,62(12),905-913.
MLA	Tanaka, Yoshiyuki,et al."Gravity changes observed between 2004 and 2009 near the tokai slow-slip area and prospects for detecting fluid flow during future slow-slip events".Earth planets and space 62.12(2010):905-913.

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