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[1]LIU Xiaoxia,JIANG Zaisen,FENG Wei.Pre-seismic Deformation of the 2016 Kumamoto MW7.1 Earthquake Detected by GPS Observations[J].Journal of Seismological Research,2017,40(03):458-464.

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Pre-seismic Deformation of the 2016 Kumamoto M_W7.1 Earthquake Detected by GPS Observations

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 03 Page number: 458-464 Column: 自投稿专栏 Public date: 2017-07-23

Title:: Pre-seismic Deformation of the 2016 Kumamoto M_W7.1 Earthquake Detected by GPS Observations

Author(s):: LIU Xiaoxia; JIANG Zaisen; FENG Wei; (Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)

Keywords:: the 2016 Kumamoto M_W7.1 earthquake; GPS strain rate; pre-seismic deformation; GPS velocity profiles

CLC:: P315.725

DOI:: -

Abstract:: We studied the characteristics of crustal deformation and variations of deformation in short terms before the 2016 Kumamoto M_W7.1 earthquake by using continuous GPS in Kyushu Island.The GPS velocity and strain rate field between Oct.2012 and Mar.2016 showed dextral shear movements between two sides of the causative fault and most strain accumulated by the west side block named CKY block.Otherwise,the velocity field in blocks NFY and SKY which are located in the east side of the causative fault showed typical counterclockwise rotation.The epicenter of the Kumamoto earthquake locates at the edge of the highest dextral shear strain area,and time-series of the first shear strain showed dextral strain was gradually increased from 2014.What's more,the GPS profiles across the Hinagu fault showed significant dextral shear strain accumulation with 1～2 mm/a relative slip rate in near-field,which may indicated creep movement of the Hinagu faults in upper crust area.

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Last Update: 2017-07-20