Abstract：A great many of microearthquake activities have been recorded in the neighborhood of Three Gorges after reservoir impounding since 2003. Frequencyspectrum of 36 known seismic events are firstly calculated, and then the characteristics of frequencyspectrum parameters are concluded. After contrasting them with seismic events on the Three Gorges area, the results show that there are comparatively abundant low frequency, and lower dominant frequency, peak frequency and corner frequency by comparing them with tectonic earthquakes. According to the characteristics of these frequencyspectrum, 29 seismic events on the Three Gorges area are classified to four types: tectonic, surface tectonic, event between tectonic and collapse, and collapse.
Wu Haibo,Yao Yunsheng,and Xue Junrong. DISCUSS OF FREQUENCY-SPECTRUM CHARACTERISTICS ANDCLASSFIED PROBLEM OF SEISMIC EVENT ON THREE GORGES[J]. jgg, 2010, 30(6): 10-15.
