摘要
本文使用了山东省和河南省地震台网部分台站的地震记录资料,计算了菏泽地震巢及附近地区1980—1985年的多台平均波速比和菏泽、梁山、嘉祥、邹县、泰安等台的单台波速比。分析结果表明:菏泽地震巢及附近地区的多台和单台波速比在1983年11月7日5.9级地震前均出现低值异常,且变化同步。主震前8个月波速比恢复。5.9级地震后,多台和单台波速比均在正常范围内变化。
The average wave-velocity ratio of multistations in the Heze earthquake nest and ks vicinity in 1980-1985 and the single-station wave-velocity ratio of Heze, Liangshan, Jiaxiang, Zouxian, Tatian and so on are calculated Using earthquake-recorded data of a part of stations of seismic networks in Shandong and Henan Provinces. The analytical result shows that all the wave-velocity ratios of multistations and single-station in Heze and its vicinity have anomalies of low value and synchronous variation before the M5.9 earthquake on 7 November, 1983. The wave-relovity ratio recovers 8 months before the mainshock. After the M5.9 earthquake, all the wave-velocity ratios of multistations and single-station change within the normal range.
出处
《地震》
CSCD
北大核心
1989年第1期46-49,共4页
Earthquake
