DOI: 10.1007/s00024-019-02347-5
论文题名: Seismic Risk on the Northern Xiaojiang Fault Implied by the Latest and Nearest GPS Observations
作者: Fu Z. ; Xu L. ; Wang Y.
刊名: Pure and Applied Geophysics
ISSN: 334553
出版年: 2020
卷: 177, 期: 2 语种: 英语
英文关键词: deformation
; fault locking
; fault slip
; GPS
; seismic risk
; Xiaojiang fault zone
Scopus关键词: Deformation
; Earthquakes
; Global positioning system
; Locks (fasteners)
; Shear strain
; Strain rate
; Velocity
; Constant azimuth
; Deformation behavior
; Dilatational strain
; Fault zone
; GPS velocity field
; Non-uniform distribution
; Seismic risk
; Velocity field
; Fault slips
; deformation
; fault slip
; GPS
; risk assessment
; seismicity
; shear strain
; China
; Xiaojiang Fault Zone
; Yunnan
; Ludia
英文摘要: On the basis of the continuous and dense GPS observations covering the northern segment of the Xiaojiang fault zone (n-XJFZ) from March 2012 to March 2016, we present the velocity field, spatiotemporal deformation, slip rate and locking depth of the n-XJFZ. The results provide strong support for achieving a better understanding of the deformation behavior of this fault. The heterogeneity of the GPS velocity field and relatively nonuniform distribution of seismicity suggest that the observational area is fragmented. Shear strain has been accumulating with an almost constant azimuth, which is consistent with the trends of the mapped major faults. The 2014 Ms 6.5 Ludian earthquake produced a sudden change in the dilatational strain, which was almost constant prior to the event, and an increase in the shear strain rate. The near-field deformation of the n-XJFZ estimated with the near-field data was larger than expected, revealing that the n-XJFZ is becoming more locked. These results imply that the seismic risk in the study area is currently rising and that, similar to the 2014 Ms 6.5 Ludian earthquake, future earthquakes will possibly occur away from mapped faults. © 2019, Springer Nature Switzerland AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159865
Appears in Collections: 气候变化与战略
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作者单位: Institute of Geophysics, China Earthquake Administration, No.5 Minzudaxue Nanlu, Haidian District, Beijing, 100081, China
Recommended Citation:
Fu Z.,Xu L.,Wang Y.. Seismic Risk on the Northern Xiaojiang Fault Implied by the Latest and Nearest GPS Observations[J]. Pure and Applied Geophysics,2020-01-01,177(2)