【摘要】 用三峡地区29次地震事件的频谱特征,与三峡周边地区36次已知成因类型地震事件的频谱特征进行对比,结果显示,与构造地震相比,三峡地区地震事件记录波形低频成分比较丰富,优势频率、峰值频率和拐角频率等参数偏低。依据频谱参数特点,这29次地震事件可分为4类,即构造地震、浅表构造地震、介于构造与塌陷之间的地震和塌陷型地震,其中第三类地震事件居多。更多还原

【Abstract】 A great many of micro-earthquake activities have been recorded in the neighborhood of Three Gorges after reservoir impounding since 2003.Frequency-spectrum of 36 known seismic events are firstly calculated,and then the characteristics of frequency-spectrum 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 frequency-spectrum,29 seismic events on the Three Gorges area are classified to four types: tectonic,surface tectonic,event between tectonic and collapse,and collapse.更多还原