DOI: 10.1002/2015GL066707
论文题名: Small interseismic asperities and widespread aseismic creep on the northern Japan subduction interface
作者: Johnson K.M. ; Mavrommatis A. ; Segall P.
刊名: Geophysical Research Letters
ISSN: 0094-9484
EISSN: 1944-9215
出版年: 2016
卷: 43, 期: 1 起始页码: 135
结束页码: 143
语种: 英语
英文关键词: afterslip
; asperities
Scopus关键词: Creep
; Earthquakes
; Geophysics
; Locks (fasteners)
; Slip forming
; Stick-slip
; Afterslip
; Asperities
; Canonical modeling
; Plate interfaces
; Stick-slip behavior
; Strain accumulations
; Subduction interface
; Tohoku-Oki earthquakes
; Faulting
; asperity
; canonical analysis
; comparative study
; creep
; deformation mechanism
; earthquake magnitude
; earthquake rupture
; GPS
; interface
; source parameters
; spatiotemporal analysis
; stick-slip
; subduction zone
; Tohoku earthquake 2011
; Japan
英文摘要: The canonical model of fault coupling assumes that slip is partitioned into fixed asperities that display stick-slip behavior and regions that creep stably. We show that this simple asperity model is inconsistent with GPS-derived deformation in northern Japan associated with interseismic coupling on the subduction interface and the transient response to Mw 6.3-7.2 earthquakes during 2003-2011. Comparisons of GPS data with simulations of earthquakes on asperities and associated velocity-strengthening afterslip require that afterslip overlaps areas of the fault that ruptured in previous earthquakes, including the 2011 Mw 9 Tohoku-oki earthquake. Whereas about 55% of the plate interface ruptured in earthquakes during 2003-2011, we infer that only 9% of the plate interface was fully locked between earthquakes. Inferred locked asperities are roughly 25% the size of rupture areas determined by seismic source inversions. These smaller asperities are consistent with interseismic strain accumulation in 2009, although more extensive locking is required a decade earlier in 1998. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84970891590&doi=10.1002%2f2015GL066707&partnerID=40&md5=3fc7e20d067e5fbbd1fce8605f37c778
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10447
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Geological Sciences, Indiana University, Bloomington, IN, United States
Recommended Citation:
Johnson K.M.,Mavrommatis A.,Segall P.. Small interseismic asperities and widespread aseismic creep on the northern Japan subduction interface[J]. Geophysical Research Letters,2016-01-01,43(1).