阿图什市5.2级地震与于田6.2级地震前兆异常分析
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摘要
利用阿克苏台网中心前兆观测数据,采用动态分析、形态法对新疆阿图什市M_s5.2地震和于田县M_s6.2地震进行系统分析。发现两次地震前,阿合奇台地倾斜资料、乌什台水管倾斜资料、伸缩仪资料、体应变及辅助测项钻孔水位和静水位数据、地电数据均出现明显的震前异常。其中水管仪、伸缩仪、体应变、地倾斜表现为打破年变,水管仪震前几天出现高频抖动、日变形态畸变;体应变辅助测项钻孔水位和静水位、地电震前表现为突变。
In this Paper,Combined with the precursory observation data of Akesu Central Seismic Station,the methods of dynamic and morphological analysis are used to comprehensively analyze the Xinjiang Atushi city Ms 5.2 earthquake and Yutian County Ms 6.2 earthquake.According to the study,it is found that the Ground Inclinometer data of Akqi Seismic Station,the Water Tube Tiltmeter data,the Extensometer data,the Volumetric Strain data and it's auxiliary measuring water level data in boreholes,the Static water level data and the Geoelectric data of Wushi Seismic Station emerged obvious precursory anomalies before the two earthquakes.The trend anomaly of the Water Tube Tiltmeter data,the Extensometer data,the Volumetric Strain data and the Ground Inclinometer data expressed as break the annual variation.The short-term anomaly of the Water Tube Tiltmeter data appeared as high-frequency jitter and shape distortion of the diurnal variation in the days before the two earthquakes.The Volumetric Strain Auxiliary measuring water level data in boreholes,the Static water level data and the Geoelectric data manifested as mutation before the two earthquakes.
In this Paper,Combined with the precursory observation data of Akesu Central Seismic Station,the methods of dynamic and morphological analysis are used to comprehensively analyze the Xinjiang Atushi city Ms 5.2 earthquake and Yutian County Ms 6.2 earthquake.According to the study,it is found that the Ground Inclinometer data of Akqi Seismic Station,the Water Tube Tiltmeter data,the Extensometer data,the Volumetric Strain data and it's auxiliary measuring water level data in boreholes,the Static water level data and the Geoelectric data of Wushi Seismic Station emerged obvious precursory anomalies before the two earthquakes.The trend anomaly of the Water Tube Tiltmeter data,the Extensometer data,the Volumetric Strain data and the Ground Inclinometer data expressed as break the annual variation.The short-term anomaly of the Water Tube Tiltmeter data appeared as high-frequency jitter and shape distortion of the diurnal variation in the days before the two earthquakes.The Volumetric Strain Auxiliary measuring water level data in boreholes,the Static water level data and the Geoelectric data manifested as mutation before the two earthquakes.
引文
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杨又陵,马世贵,李晓东,等.新疆数字化形变观测的潮汐参数及稳定性分析[J].内陆地震,2009,23(2):107-115.
布赖特.岩石破坏前倾斜和地震活动性异常的实验研究//国家地震局科技监测司编.地震理论与实验译文集[M].北京:地震出版社,1979:215-219.
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