Determination of epicenters before earthquakes utilizing far seismic and GNSS data: Insights from ground vibrations

Chen，Chieh Hung1,2; Lin，Li Ching3; Yeh，Ta Kang4; Wen，Strong5; Yu，Huaizhong6; Yu，Chen6; Gao，Yongxin7; Han，Peng8; Sun，Yang Yi2; Liu，Jann Yenq9,10,11; Lin，Cheng Horng12; Tang，Chi Chia2; Lin，Che Min13; Hsieh，Hung Hao13; Lu，Pin Ji14

2020-10-01

Common-mode ground vibrations Pre-earthquake anomalous phenomena Pre-earthquake ground motion

English

Ministry of Science and Technology, Taiwan[106-2116-M-194-016];Ministry of Science and Technology, Taiwan[106-2628-M-008-002];National Natural Science Foundation of China[41474038];National Natural Science Foundation of China[41774048];

Broadband seismometers, ground-based Global Navigation Satellite Systems (GNSS), and magnetometers that were located within an epicentral distance of approximately 150 km consistently observed the novel anomalous behaviors of the common-mode ground vibrations approximately 5–10 days before the M6.6 Meinong earthquake in Taiwan. The common-mode ground vibrations with amplitudes near 0.1 m at frequencies ranging from 8 × 10 to 2 × 10 Hz were generated near the region close to the epicenter of the impending earthquake. The common-mode vibrations were consistently observed in seismic and GNSS data associated with five other earthquakes in four distinct areas. The results reveal that the common-mode vibrations could be a typical behavior before earthquakes. The causal mechanism of common-mode vibrations can be attributed to crustal resonance excitations before fault dislocations occur. Potential relationships with other pre-earthquake anomalies suggest that the common-mode vibrations could be ground motion before earthquakes, which was investigated for a significant length of time.

10.3390/rs12193252

Remote Sensing

12

19

1-13

SCI ; EI

Others

2-s2.0-85092794130

Scopus

WOS:000587196600001

20204309383428

Earthquakes

Seismology:484

2072-4292

1.State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan,430074,China
2.Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan,430074,China
3.National Applied Research Laboratories,Taipei,10636,Taiwan
4.Department of Real Estate and Built Environment,National Taipei University,New Taipei,23741,Taiwan
5.Department of Earth and Environmental Sciences,National Chung Cheng University,Chia-Yi,62102,Taiwan
6.China Earthquake Networks Center,Beijing,100045,China
7.School of Civil Engineering,Hefei University of Technology,Hefei,230009,China
8.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518055,China
9.Graduate Institute of Space Science,National Central University,Taoyuan,32001,Taiwan
10.Center for Space and Remote Sensing Research,National Central University,Taoyuan,32001,Taiwan
11.Center for Astronautical Physics and Engineering,National Central University,Taoyuan,32001,Taiwan
12.Institute of Earth Sciences,Academia Sinica,Taipei,11529,Taiwan
13.National Center for Research on Earthquake Engineering,Taipei,106219,Taiwan
14.Key Laboratory of Earthquake Geodesy,Institute of Seismology,China Earthquake Administration,Wuhan,430071,China

Chen，Chieh Hung,Lin，Li Ching,Yeh，Ta Kang,et al. Determination of epicenters before earthquakes utilizing far seismic and GNSS data: Insights from ground vibrations. 2020-10-01.