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| 2020年新疆于田MS6.4地震和田台地电场异常的测道差异性 | |
| 引用本文： | 王宇,谭大诚,邱大琼,张锋,陈亮.2020年新疆于田MS6.4地震和田台地电场异常的测道差异性[J].地震,2021,41(2):180-189. |
| 作者姓名： | 王宇 谭大诚 邱大琼 张锋 陈亮 |
| 作者单位： | 1.中国地震局兰州地震研究所, 甘肃 兰州 730000; 2.甘肃省地震局, 甘肃 兰州 730000; 3.新疆维吾尔自治区地震局, 新疆 乌鲁木齐 830011 |
| 基金项目： | 中国地震局监测司2020年任务项目(zx1903006, zx2004002) |
| 摘 要： | 和田地电场台站距离2020年6月26日于田MS6.4地震震中约305 km, 该台不同方位测道之间相关系数均值在0.8左右, 应用多极距原理获知震前两月该台地电场数据中“近场”信息较复杂, 但具有一定程度的可靠性。 计算该台不同极距测道的优势方位角α和不同方位测道间相关系数δNS/NW, 获知震前数月长、 短极距α、 δNS/NW存在不同的异常现象。 2011—2019年, 和田台周边300 km范围发生了6次MS5.0以上地震, 这种异常现象的差异具有类似特点。 这反映出在同一场地, 地电场长、 短极距观测装置对周边中强地震的映震能力可能存在差异性。 |
| 关 键 词： | 2020年于田MS6.4地震 地电场 多测道 异常 差异 |
| 收稿时间： | 2021-01-08 |
| 修稿时间： | 2021-01-25 |
The Azimuth Difference of the Geoelectric Field Anomaly of Hetian Station in the 2020 Yutian Ms6.4 Earthquake,Xinjiang |
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| WANG Yu,TAN Da-cheng,QIU Da-qiong,ZHANG Feng,CHEN Liang.The Azimuth Difference of the Geoelectric Field Anomaly of Hetian Station in the 2020 Yutian Ms6.4 Earthquake,Xinjiang[J].Earthquake,2021,41(2):180-189. | |
| Authors: | WANG Yu TAN Da-cheng QIU Da-qiong ZHANG Feng CHEN Liang |
| Institution: | 1. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China; 2. Earthquake Administration of Gansu Province, Lanzhou 730000, China; 3. Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China |
| Abstract: | The Hetian geoelectric field station is located about 305 km away from the epicenter of the Yutian MS6.4 earthquake on June 26, 2020. The mean value of the correlation coefficient between the stations in different azimuths is about 0.8. The multipole distance principle is used to obtain the geoelectric field of the station two months before the earthquake. The “near field” information from the data is more complex, but it has a certain degree of reliability. The dominant azimuth α of the station with different polar distances and the correlation coefficient δNS/NW between the different azimuths have been calculated, which indicates that there are different anomalies in the long and short polar distances α and δNS/NW several months before the earthquake. From 2011 to 2019, 6 earthquakes above MS5.0 occurred in the 300 km area around Hotan Station, which has similar geoelectric abnormal phenomenon characteristics with the Yutian MS6.4 earthquake. This reflects that at the same site, there may be differences between the long and short pole distance observation devices for geoelectric field monitoring on moderate and strong earthquakes. |
| Keywords: | the 2020 Yutian MS6 4 earthquake Geoelectric field Multi-channel Anomaly Difference |
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