甘肃永登5.8级地震前兆异常特征及天祝-古浪5.4级地震中短期预报  

STUDY ON THE PRECURSORY CHARACTERISTICS OF YONGDENG EARTHQUAKE (M_S=5.8) AND MEDIUM-AND SHORT-TERM PREDICTION OF TIANZHU-GULANG EARTHQUAKE (M_S=5.4)

作　　者：毛可[1] 王振亚[1] 石特临[1] 

机构地区：[1]国家地震局兰州地震研究所,中国兰州730000

出　　处：《地震》1998年第2期177-183,共7页Earthquake

摘　　要：综合分析了 1 995年 7月 2 2日甘肃永登 5 .8级地震前兆异常时空分布特征 ,主要表现为异常数量多、分布广、密度大、震后响应性异常显著 ,且时空分布具有成组性、空间分布具有相对稳定性。这可能与该区中强震成丛活动方式有关。此研究结果在 1 996年 6月 1日甘肃天祝 -古浪 5 .In this paper, the characteristics of temporal and spatial distribution of the precursory anomaly before Yongdeng earthquake have been analyzed by using synthetical method. The analytical results show that the precursors of Yongdeng earthquake (M S =5.8) are of the following features: large quantity, wide distribution, high density and obvious postseismic response. The temporal distribution is in groups, the spatial distribution is relatively stable, which may be related with such a pattern that the moderately strong earthquakes occurred in swarms in this area. This research result has been applied to the medium term and short term prediction of Tianzhu Gulang earthquake (M S =5.4) in 1996.

关 键 词：前兆异常 中期预报 短期预报 地震预报 甘肃 

分 类 号：P315.7[天文地球—地震学]