摘要
综合分析2022年3月17日皮山M_(S)5.2地震前震中附近存在的区域电磁异常特征。结果表明:①本次震中距离地磁低点位移预测线约280 km,且与优势发震时间接近,该异常对应本次地震;②本次地震虽然发生在地磁逐日比和地磁垂直强度极化预测区内,但震级偏小,且距离异常台站较远,异常不对应此次地震;③将地磁逐日比和低点位移进行综合分析有助于提高地震短期预测的准确性。
Comprehensively analyzed the characteristics of regional electromagnetic anomalies near the epicenter before Pishan M_(S)5.2 earthquake on March 17,2022.The results show that:(1)the epicenter is about 280 km away from the predicted line of geomagnetic low-point displacement,and it was close to the second dominant earthquake time;(2)although the earthquake occurred in the predicted area of daily geomagnetic daily ratio and geomagnetic vertical intensity polarization anomalies,its magnitude is relatively small,and the distance from the anomalous station is far,the anomaly does not correspond to the earthquake;(3)The comprehensive analysis of the daily geomagnetic ratio and the geomagnetic low-point displacement can help to improve the accuracy of short-term earthquake prediction.
作者
张桉赫
冯丽丽
黄颂
宋春燕
ZHANG An-he;FENG Li-li;HUANG Song;SONG Chun-yan(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China;Qinghai Earthquake Agency,Xining 810001,Qinhai,China;Institute of Seismology,CEA,Wuhan 430071,Hubei,China;Hubei Earthquake Agency,Wuhan 430071,Hubei,China)
出处
《内陆地震》
2023年第4期362-372,共11页
Inland Earthquake
基金
新疆地震科学基金项目(202206)
新疆地震局任务类专项资助课题(2022RWL02)
自治区重点研发子课题(2020B03006-3)
新疆维吾尔自治区自然基金特培项目(2022D03031).
关键词
皮山M_(S)5.2地震
低点位移
地磁逐日比
地磁垂直强度极化
Pishan M_(S)5.2 earthquake
Geomagnetic low-point displacement
Daily ratio of vertical component of geomagnetic field
Geomagnetic polariza
