澜沧江漫湾电站水库诱发地震分析
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摘要
全面分析了漫湾电站水库蓄水前后 ,库坝区周围地震活动时空强分布 ,水库蓄水的水位与库坝区地震活动的动态变化关系 ,结果表明 ,漫湾水库诱发地震的时间集中于蓄水后 5年内 ,库水位升降之后 1个月左右 ,库坝区发生高频度的 3~ 4级地震 ,最大月频次为蓄水前的 6倍 ,最大地震震级为 4 6级 ,空间分布集中于大坝约 10km范围内 ,为快速响应、震群型的诱发地震。
Temporal, spatial and intensive distribution of seismicity around the reservoir before and after impounding at Manwan Power Station was analyzed. The results show that reservoir induced seismicity occurs in 5 years after the impounding and about one month after water level variation, ascending or descending. The earthquakes of M 3~4.9 occurred frequently around the reservoir dam. The maximum monthly frequency is 6 times larger than that before impounding. The maximum magnitude is M 4.6. The spatial distribution is concentrated in an area around the dam of 10 km. The seismicity is characterized as frequent response and swarm earthquakes.
引文
胡先明.2003.大桥水库诱发44级地震前的地震学异常[J].地震地磁观测与研究,24(3):14~19
    杨晓源.1999.我国近年水库地震监测综述[J].地震地磁观测与研究,20(4):3~15
    张敏,张启胜.2000.龙羊峡水库区的地震活动[J].地震地质,22(3):216~218

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