CAJ | 학술논문

利用广西龙滩水库地震台网记录的数字地震波资料，用波谱分析方法计算了龙滩水库库区ML2．5—4．5级共计95个地震的震源参数。并对震源参数进行分析，结果表明：库区视应力的范围在0-3．5巴之间，2007年7月17日库区最大4．5级地震的视应力最大，为3．07巴。视应力随震级的增大呈幂函数增大趋势，两者的拟合关系为：σapp=0．0046M^4.34，R^2=0．71。水库坝址所在区域（南区）的平均视应力水平相对于北区和西区要高。拐角频率随时间从2008年10月底以来有一个比较显著的上升趋势。说明2008年底以来，库区地震震级在无上升趋势的情况下，地震破裂尺度在减小，区域应力在减小。
이용엄서룡탄수고지진태망기록적수자지진파자료，용파보분석방법계산료룡탄수고고구ML2．5—4．5급공계95개지진적진원삼수。병대진원삼수진행분석，결과표명：고구시응력적범위재0-3．5파지간，2007년7월17일고구최대4．5급지진적시응력최대，위3．07파。시응력수진급적증대정멱함수증대추세，량자적의합관계위：σapp=0．0046M^4.34，R^2=0．71。수고패지소재구역（남구）적평균시응력수평상대우북구화서구요고。괴각빈솔수시간종2008년10월저이래유일개비교현저적상승추세。설명2008년저이래，고구지진진급재무상승추세적정황하，지진파렬척도재감소，구역응력재감소。
By using the digital seismic wave recording data from the Seismic Network of Longtan Dam, Guangxi Province, the earthquake source parameters is calculated with the method of seismic wave spectral analysis. Our calculation shows that the apparent stress values around Longtan Dam range from 0 to 3.5 Pa and the apparent stress drop caused by an M4.5 Earthquake on 17 July 2007 is 3.07 Pa. The apparent stress drop changes with the power law of the earthquake magnitude. The fitting relation is：σapp=0.0046M^4.34, and R^2 =0.71. The average apparent stress of the dam area is higher than that of northern and western area. The corner frequency has increased with the time since October 2008. The calculation results show that the earthquake magnitude around the dam does not get big and the break length of earthquakes gets smaller and so the apparent stress decrease.