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本文用多种数字地震学方法研究了2012年7月20日江苏高邮MS4.9级地震的震源机制解和震源深度.首先用CAP方法反演了江苏高邮MS4.9级地震的震源机制解和震源深度,最佳解节面I走向角为109°,倾角85°,滑动角18°;节面II走向角17°,倾角72°,滑动角175°;矩震级MW为4.82;优势震源深度为10km.为验证研究结果的可靠性,我们一方面用Snoke方法反演了高邮地震的震源机制解,反演结果与CAP方法反演的结果相差不大;另一方面,使用近震深度震相到时差的测量和对远震波形拟合的方法进一步研究震源深度,结果均表明江苏高邮MS4.9级地震的震源深度在9～10km左右,与CAP方法的结果一致.多种方法研究结果的一致性可以充分说明本文研究结果比较可靠.结合前人地质资料的研究成果和本文对高邮地震震源机制解的研究,我们认为滁河断裂很可能是江苏高邮MS4.9级地震的发震构造.
In this paper, we use a variety of digital seismological methods to study the focal mechanism solutions and focal depths of the MS4.9 MS7.0 earthquake in Jiangsu Province on July 20, 2012. The focal mechanism solution of the MS4.9 MS7.0 earthquake in Jiangsu Province is retrieved using the CAP method The focal depth of the focal plane, the best solution section I strike angle is 109 °, the inclination angle is 85 °, the sliding angle is 18 °, the sagittal plane II is 17 °, the inclination angle is 72 °, the sliding angle is 175 °, and the moment magnitude MW is 4.82. Is 10km.In order to verify the reliability of the research results, on the one hand, we reconstruct the focal mechanism solution of the Gaoyou earthquake using the Snoke method, and the inversion results are not much different from those obtained by the CAP method. On the other hand, The results show that the focal depth of the MS4.9 of the Jiangsu Gaoyou MS9.9 earthquake is about 9 ~ 10km, which is consistent with the result of the CAP method.The results of various methods The results of this study can be fully proved that the Chuhe fault is likely to be the seismogenic structure of the MS4.9 earthquake in Jiangsu Gaoyou, based on the research results of predecessor geological data and the study of focal mechanism solution of the Gaoyou earthquake in this paper .