黑龙江省及邻区中强震前固体潮调制比特征分析  

Analysis on the characteristics of earth tide modulation ratio before moderate-strong earthquakes in Heilongjiang Province and its adjacent areas

作　　者：张思萌 马亚伟 马艳丽 ZHANG Simeng;MA Yawei;MA Yanli(Heilongjiang Earthquake Agency,Harbin 150090,China;China Earthquake Networks Center,Beijing 100045,China)

机构地区：[1]黑龙江省地震局,哈尔滨150090 [2]中国地震台网中心,北京100045

出　　处：《地震地磁观测与研究》2022年第6期23-29,共7页Seismological and Geomagnetic Observation and Research

摘　　要：基于黑龙省及邻区浅源地震目录,通过固体潮调制比的时空分析方法回顾性地研究了黑龙江省及邻区1970年以来发生的5级以上地震,发现在12次中强震震例中,有7次地震前出现调制比异常,地震发生对应率为58.33%,异常区域分布在距震中150 km内的区域,异常通常在主震前一年出现,呈现高值异常,并在震前消失或减弱。因此,固体潮调制比分析方法对黑龙江省及邻区中强地震预测具有一定的指示意义。Based on the shallow-focus earthquakes catalog in Heilongjiang Province and its adjacent areas,the modulation ratio method is employed to carry out spatio-temporal scanning for earthquakes with M_(S)≥5.0 since 1970 in Heilongjiang Province and its adjacent areas.It is found that among the 12 cases of moderate earthquakes,there are 7 cases of anomalous modulation ratio before the earthquakes and the corresponding rate of earthquake occurrence is 58.33%.The anomalous area is distributed within 150 km from the epicenter of the earthquake.The anomaly which is in the form of high-valueusually occursone year before the main earthquake and disappears or weakens before the earthquake.Therefore,the analysis method of earth tide modulation ratio has certain indicative significance for the prediction of moderate-strong earthquakes in Heilongjiang Province and its adjacent areas.

关 键 词：固体潮调制比 调制异常 时空特征 时序特征 

分 类 号：P315[天文地球—地震学]