地震地磁观测与研究2023，Vol.44Issue(6)：1-12,12.DOI:10.3969/j.issn.1003-3246.2023.06.001
2022年1月2日云南宁蒗MS5.5地震总结
About Ninglang MS 5.5 earthquake in Yunnan on Jan.2,2022
摘要
Abstract
The anomalies of seismicity and geophysical observation before the Ninglang MS 5.5 earthquake are systematically summarized.The main results are as follows:① In terms of seismicity,there are some anomalies such as seismic quiescence,high-frequency seismicity and seismic gap;② In terms of geophysical observation,there are medium-term and short-term anomalies within 200 km of the epicenter,such as borehole strain,dominant azimuth of geoelectric field,apparent resistivity,and water level.The focal mechanism of the Ninglang MS 5.5 earthquake shows that the fault type of the earthquake is mainly normal fault by analyzing its earthquake sequence.The aftershock activity is abundant and the earthquake sequence has segmented characteristics.The magnitude difference between the main shock and the largest aftershock is 0.9,and the energy released by the main shock accounts for 93.53%in the whole sequence,therefore,the Ninglang earthquake sequence is primarily of mainshock-aftershock type.According to the comprehensive analysis,the medium-term and short-term anomalies of seismicity before the Ninglang MS 5.5 earthquake are prominent,and the geophysical observation anomalies are relatively abundant,which are distributed in northwest in Yunnan and surrounding area.This phenomenon has certain indicative significance for the occurrence of the Ninglang earthquake.关键词
宁蒗MS5.5地震/地震活动异常/地球物理观测异常/时空演化Key words
Ninglang MS 5.5 earthquake/seismicity anomaly/geophysical observation anomaly/spatio-temporal evolution引用本文复制引用
冯晓博,解孟雨,张小涛,苑争一,姚丽,郭菲,田雷..2022年1月2日云南宁蒗MS5.5地震总结[J].地震地磁观测与研究,2023,44(6):1-12,12.基金项目
震情跟踪青年项目(项目编号:2023010309) （项目编号:2023010309）
