地震学报2017，Vol.39Issue(5)：738-750,13.DOI:10.11939/jass.2017.05.009
西北地区中强震前固体潮调制比时空特征分析
The spatio-temporal characteristics of earth tide modulation ratio before moderate earthquakes in northwest China
摘要
Abstract
Based on the shallow-focus earthquakes lunar catalog in Chinese mainland from 1900 to 2015,modulated lunar date and threshold of modulation ratio are defined respectively according to seismic active characteristics.The modulation ratio method is employed to carry out spatio-temporal scanning for three moderate earthquakes in northwest China,and the spatio-temporal characteristics of modulation ratio of regional small earthquakes are analyzed.Results indicate that there are modulation ratio anomalies around epicentral area before Minxian-Zhangxian Ms6.6 earthquake and Alxa Ms5.8 earthquake,evolution time of modulation ratio anomaly is relatively long for Menyuan Ms6.4 earthquake.All three moderate earthquakes happened around the area with higher earth tide modulation ratio according to the spatio-temporal scanning results,and the length of time window and the abnormal area size of the earth tide modulation ratio may have correlations with the magnitude of moderate earthquakes.关键词
固体潮调制比/阿拉善M5.8地震/岷县漳县Ms6.6地震/门源Ms6.4地震Key words
earth tidal modulation ratio/Alxa Ms5.8 earthquake/Minxian-Zhangxian Ms6.6 earthquake/Menyuan Ms6.4 earthquake分类
天文与地球科学引用本文复制引用
韩颜颜,孟令媛,刘桂萍,周龙泉,臧阳,李智超..西北地区中强震前固体潮调制比时空特征分析[J].地震学报,2017,39(5):738-750,13.基金项目
中国地震局川滇国家地震监测预报实验场项目(2016CESE0101)和国家自然科学基金(41504047,41404045)联合资助. （2016CESE0101）
