2020年5月9日柯坪Ms5.2地震前阿克苏区域地球物理观测异常分析

ANOMALY ANALYSIS OF GEOPHYSICAL OBSERVATIONS IN AKSU AREA BEFORE THE Ms5.2 KEPING EARTHQUAKE ON MAY 9, 2020

以2020年5月9日新疆柯坪Ms5.2地震附近阿克苏区域的地球物理观测数据为研究对象,采用形态法对多项地球物理观测资料进行对比分析,获得了震前的前兆异常变化信息。结果表明:在2020年5月9日柯坪5.2地震震前乌什台伸缩、阿合奇地倾斜、阿克苏断层氢资料均出现了明显的异常变化,异常特征表现为震前加速、转向变化,属于地震前兆异常;而乌什水温观测数据虽然在震前出现了明显的快速异常变化,经分析认为是水温仪器自身问题所致,不是地震前兆异常。

This paper takes the geophysical observations of the Aksu area near the MS5.2 Keping earthquake in Xinjiang on May 9, 2020 as the research object.The morphological method is used to compare and analyze the anomaly multiple geophysical observation data, and the precursor anomalies are obtained before the earthquake. The results show that: Wushi extensometer, Aheqi tilt and Aksu fault hydrogen data all showed obvious abnormal changes. The abnormal characteristics include acceleration and turning changes before the earthquake, which are precursor anomalies before the earthquake. Although the Wushi water temperature observation showed obvious rapid abnormal changes before the earthquake, it was analyzed and considered that it was caused by the instrument itself, not the precursory anomaly before the earthquake.