2011年安庆M4.8地震前合肥台地电阻率异常变化分析

doi:10.12196/j.issn.1000-3274.2023.02.007

Abstract

Abstract: The earth resistivity at Hefei seismic station showed remarkable anomaly before the 2011 Anqing M4.8 earthquake. By means of correlation analysis of meteorological factors, quantitative rectifying of precipitation and the finite element simulation, the possibility of meteorological factors and construction interference causing the earth resistivity anomaly was excluded, this anomaly was finally verified to be a precursor anomaly of the 2011 Anqing M4.8 earthquake. In this paper, the generating mechanism of the earth resistivity anomalies is discussed, combined with the earth resistivity at Hefei seismic station. It is deemed that anisotropic characteristics of earth resistivity anomalies may be related to focal mechanism solution, seismogenic fault strike of the main shock. This work provides important reference for confirming earth resistivity anomalies and predicting the earthquake location.

Key words: The 2011 Anqing M4.8 earthquake, Earth resistivity anomaly, Meteorological factor, Focal mechanism solution, Anisotropy

CLC Number:

P315.7

HE Kang, XIE Tao, WANG Yi-kun, LI Jun-hui, ZHENG Hai-gang. Analysis of Earth Resistivity Anomaly at Hefei Seismic Station before the 2011 Anqing M4.8 Earthquake[J]. EARTHQUAKE, 2023, 43(2): 72-84.

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Analysis of Earth Resistivity Anomaly at Hefei Seismic Station before the 2011 Anqing M4.8 Earthquake

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