摘要
Seismicity in the Jingpohu volcanic area was investigated based on the seismic data recorded by the mobile seismic network consisting of 14 stations equipped with 24-bit broad-band 3- component seismographs around Crater Forest, Results show that there appears certain seismicity in Jingpohu and its adjacent areas with a low activity level and most of the recorded earthquakes are the volcanic-tectonic ones, The results of location indicate a dominant focal depth of 10km - 30kin, most of the earthquakes are smaller than ML2,0, and are concentrated in the area of ＂ Crater Forest＂ and on the Dunhua-Mishan fault which runs through the volcanic area. At station No. 2, which has better observation conditions, two types of events, likely associated to volcanism, were recorded; their waveform characteristics are somewhat similar to that of the long-period volcanic event and the volcanic tremor, but with different feature of frequencies.
Seismicity in the Jingpohu volcanic area was investigated based on the seismic data recorded by the mobile seismic network consisting of 14 stations equipped with 24-bit broad-band 3-component seismographs around Crater Forest.Results show that there appears certain seismicity in Jingpohu and its adjacent areas with a low activity level and most of the recorded earthquakes are the volcanic-tectonic ones.The results of location indicate a dominant focal depth of 10km～30km,most of the earthquakes are smaller than M_L2.0,and are concentrated in the area of "Crater Forest" and on the Dunhua-Mishan fault which runs through the volcanic area.At station No.2,which has better observation conditions,two types of events,likely associated to volcanism,were recorded;their waveform characteristics are somewhat similar to that of the long-period volcanic event and the volcanic tremor,but with different feature of frequencies.
基金
The research was jointly sponsored by National Natural Science Foundation (GrantNo. 40474049)
the Public Welfare Research Fund ofMinistry of Science andTechnology of China (2001DIA10003)
