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2008年3月30日在甘肃省肃南县皇城镇一带发生了一次MS5.0地震。本文归纳总结了本次地震的基本地震参数、序列特征,利用P波资料计算了震源机制解,根据地震现场考察结果分析了烈度分布特征。综合本次地震的地质构造和历史地震活动背景、震源机制、余震分布、极震区长轴方向分析了本次地震的发震构造,结果显示本次地震的发震构造不清晰。
On March 30, 2008, an MS5.0 earthquake occurred in Huangcheng Town, Sunan County, Gansu Province. This paper summarizes the basic seismic parameters and sequence features of the earthquake, calculates focal mechanism solutions by P-wave data, and analyzes the intensity distribution features based on the field investigation results. Based on the geological structure of this earthquake and the background of historical seismic activity, focal mechanism, aftershock distribution, and the direction of the long axis of the extreme earthquake area, the seismogenic structure of this earthquake was analyzed. The results show that the seismogenic structure of this earthquake is not clear.