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在严重干旱背景下,2010年6月27日—30日广西西北部出现大暴雨,28日凌云—凤山交界发生3级(ML)震群活动,采用多台法计算主震30 km范围内震群前后及期间2.0级以上地震波速比,并利用单台法计算甲龙、平果地震台波速比,发现震群波速比高于震群发生前后数值,靠近震区的流动台、甲龙地震台波速比高于平果地震台。利用波速比判别震群是否由降水触发,对震情趋势判定有一定参考。
In the context of severe drought, a heavy rainstorm occurred in northwestern Guangxi from June 27 to June 30, 2010, and a third-order (ML) earthquake swarm occurred at the Lingyun-Fengshan junction on the 28th. A number of methods were used to calculate the large earthquakes Before and after the group, the wave velocity ratio of magnitude 2.0 and above was calculated, and the wave velocity ratio of the Qilong and Pingguosi seismic stations was calculated by a single method. The wave velocity ratio of the swarm was found to be higher than that before and after the earthquake swarm. Taiwan wave speed ratio is higher than the Pingguo seismic station. The use of wave velocity ratio to determine whether the earthquake swarm triggered by precipitation, the trend of the earthquake have a certain reference to determine.