中国大陆火山监测研究进展

在过去几年里，长白山天池火山观测到了明显的地震活动增加、地表抬升和膨胀以及多种流体化学异常。地震学研究和形变模拟表明，长白山天池火山近年来的活动可能是由其下方的岩浆活动引起的。1993年以来，腾冲火山出现强烈的水热活动。地球化学参数的变化表明，气体源区的深度逐渐增加。火山区存在的震群活动、部分台站观测到的S波阴影区以及地表的缓慢抬升等，指示火山区存在一个岩浆系统。监测研究结果表明，目前我国大陆其他火山的活动性较弱。

The recent progress of volcanic monitoring in China Mainland

In past few years, the high level of seismicity, obviously uplifting and expanding of the surface and fluid chemistry anomalies are observed in the Chanbaishan Tianchi volcano. Seismological and ground deformation modeling show that the recent crisis in Changbaishan Tianchi volcano is induced by the active of magma beneath the volcano, In Tengchong volcano, the strong hydrothermal activities are observed since 1993. The variation of geochemical parameters indicates the degassing process is from shallow to deep. The existing of earthquake swarm, S wave shadow in some seismic stations and gradually uplifting of surface suggest a magma system beneath these volcanoes. The monitoring results from other volcanoes show that most other volcanoes are not so active as Changbaishan and Tengchong volcanoes.