吉林省现代有感地震活动及震害

CURRENT DETECTABLE EARTHQUAKE ACTIVITY AND EARTHQUAKE DAMAGES OF JILIN PROVINCE

吉林省境内１９７６年以来仪器记录到的所有地震一般为ＭＬ１．０～４．３小震，在这些小震中约１／９的地震有感，ＭＬ≥２．５小震约１／３有感，ＭＬ≥３．５级地震全部有感。有感小震主要分布在吉林省中部和南部，与吉林省现今中小震空间分布有大致相同的格架，与发震构造密切相关。绝大多数地震听到了地声，震级小烈度值偏大，有感小震在极震区造成一定的震害。

Magnitude values of all earthquakes shown by the instrument recording over the whole Jilin province since 1976 usually are ML:10～43In these small earthquakes,about 1/9 of them are detectable,about 1/3 of the events of ML≥25 are detectable,and all those earthquakes of ML≥35 are detectableThese detectable small earthquakes mainly distribute over the southern and central Jilin,its characteristic is similar to the current spatial distribution characteniseic of middle and small earthquakes,and closely correlates to the developing tectonismMost earthquakes give off earthquake soundsIts magnitude is small and its intensity tends to be greatThe detectabel small earthquakes can lend to certain earthquake damages in the epicentral area