通过对2007年6月3日宁洱Ms6.4、Ms5.1两次地震的强震动台站观测记录的谱分析,估算了两次地震的辐射能量、地震矩、矩震级等震源参数。结果表明,虽然对拐角频率、应力降等参数各台站的估算结果离散性较大,效果不甚理想,但利用近场强震动观测记录,可以对地震辐射能量、地震矩、矩震级3个参数作出较好的估计。
From the spectrum analysis on strong motion recordings of 3, June, 2007 Ninger Ms6.4, Ms5. 1 earthquakes from some stations, this paper estimates the source parameters of two earthquake such as seismic radiated energies, seismic moments, moment magnitude and so on. The results show although the estimates of corner frequency, stress drop and so on in different stations vary widely, it is good to estimate seismic energies, seismic moment and moment magnitude.