1引言火山能够产生大量地震信号,这些信号与地震断层产生的地震信号不同。几乎在每一次有记录的火山喷发之前,火山下面或附近的地震活动性会增强,并伴有不同程度的地震活动。因此,地震学已成为火山喷发预报和监测的最有力的手段之一。目前,尽管在不同火山建立的监测站的数量和 1 INTRODUCTION Volcanoes are capable of producing a large number of seismic signals that are different from the seismic signals produced by seismic faults. Seismic activity beneath or near volcanoes intensifies, with varying degrees of seismic activity, almost every recorded volcanic eruption. Seismology has therefore become one of the most powerful means of predicting and monitoring volcanic eruptions. At present, despite the number of monitoring stations established on different volcanoes