摘要
对玉门MS5.9地震前的原震区历史地震进行了简要叙述,并用地震活动性各项异常指标作了趋势判定,对地电前兆临震异常特征进行了分析。从甘肃12个地电观测台32个测项中检索到了7个地电观测台13个测项电阻率(电磁波)有异常存在,同时地震活动性频度、C值、b值、GL值、η值在玉门5.9级地震前也出现了中、短临异常。利用这些异常现象分析研究了玉门5.9级地震前地震活动性趋势异常和前兆临震异常变化特征。
Author briefly recounted the history earthquakes occurred in the region where the Yumen M\-S5.9 earthquake occurred, accorded every anomaly index of earthquake activity to determine the trend and analyzed the geoelectric precursory short-term anomaly characteristics. Found 13 earth resistivity anomalies were observed by 7 geoelectric stations that come from 32 indexs were tested by 12 geoelectric stations, at the same time, there have medium-term, short-term anomalies on the earthquake frequency, C value, b value, GL value and η value before the yumen M\-S5.9 earthquake. Author use this anomalies to analyze the earthquake activity trending anomalies and precursory short-term anomaly characteristics before yumen M\-S5.9 earthquake.
出处
《内陆地震》
2004年第4期325-332,共8页
Inland Earthquake
关键词
玉门Ms5.9地震
地震活动性
地电阻率
前兆异常
Yumen M\-S5.9 earthquake
Earthquake activity
Earth resistivity
Precursory anomaly.
