Creep-Meter Observation and Earthquakes along the Xianshuihe Fault Zone
Abstract Based on creep meter data from Xianshuihe fault zone, we analyze, by fault kinematics and principal component analysis method, fault activity characteristics and their relationship with the preparation-occurrence of moderate earthquakes around the Xianshuihe fault and great earthquakes in a large-scale area nearby. The results show that: 1) Current kinematic characteristics of Xianshuihe fault are mainly left strike-slip, the dislocation mode is not singlular but turns dextral strike-slip multiple times; 2) Xianshuihe fault zone creep observation shows anomaly variations before the Baiyu MS5.5, Wenchuan MS8.0, Lushan MS7.0 earthquakes, along with the Kangding MS6.3 earthquake, which is a precursor to those earthquakes; further, the amplitude extension beginning at the end of 2001 is affected by the large regional stress field adjustment after the west Kunlun mountain pass MS8.1 earthquake in 14 November, 2001.
Key words :
Xianshuihe fault zone
creep observation
fault activity parameters
principal component analysis
deformation anomaly
Cite this article:
LI Layue,HU Leyin,MA Lingli et al. Creep-Meter Observation and Earthquakes along the Xianshuihe Fault Zone[J]. jgg, 2017, 37(11): 1121-1125.
LI Layue,HU Leyin,MA Lingli et al. Creep-Meter Observation and Earthquakes along the Xianshuihe Fault Zone[J]. jgg, 2017, 37(11): 1121-1125.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2017/V37/I11/1121
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