1999年辽宁省岫岩5.4级地震的临震预报及其地震活动研究  

The Impending Prediction and Seismicities of the 1999 Xiuyan Earthquake

作　　者：吕培苓[1] 郑大林[1] 刘蒲雄[1] 陈学忠[1] 陈荣华[1] 王慧敏[1] 吕梅梅[1] 

机构地区：[1]中国地震局分析预报中心,北京100036

出　　处：《国际地震动态》2000年第3期4-7,共4页Recent Developments in World Seismology

摘　　要：1999年 11月 2 9日 12时 10分 (北京时间 ) ,中国辽宁省岫岩地区发生一次 5 .4级地震。这次地震前 ,在震区记录到丰富的中小地震活动 ,组成了完整的地震系列。该系列具有小震频度随时间增多 ,震级上升 ,b值较低 ,地震位置集中和地震 P波初动一致 ,将其判断为震前系列 ,并抓住了前震活动从密集突然变为相对平静这一大震即将发生的特征 ,作出了临震预报 ,于 11月 2 8日晚将临震意见通报给辽宁省地震局有关部门。这次地震的预报取得了减灾实效。At 12:10,on November 29,1999,an earthquake of M 5 4 occurred in Xiuyan area,liaoning Province .Before the event,within 20 days,from November 9 to 28,1999,about 240 medium and minor earthquakes were recorded in the area,hence composing a complete earthquake series which had the following features:increasing minor earthquake frequencies with time,the rising of magnitudes,concentration of all event locations and recording comptible seismic P wave onset,and was diagnosed as foreshock series.According to the characters of dense quiet earthquake occurrence,the impending prediction was made,and prediction ideas were reported to the related departments of the Seismological Bureau of Liaoning Province at the evening of November 28.Because of issuing short impending prediction,some suitable countermeasures for earthquake preparedness were taken;good results were achieved in reducing earthquake disasters.

关 键 词：前震系列 临震预报 岫岩地震 地震活动性 地震 

分 类 号：P315.7[天文地球—地震学] P315.5[天文地球—固体地球物理学]