RESEARCH ON VOLCANIC ACTIVITY IN THE NORTHERN MARIANAS

点击翻译按钮获取中文摘要

Comprehensive observation was carried out at Anatahan volcano, Northern Marianas during 2008-2009. A continuous volcanic tremor of phreatic eruption, sourced just beneath the crater and with the amplitude increased by the time of eruption, was recorded. Following the eruption, deflation of the magma source on the conduit inclined to the west was analyzed by the GPS observation. Eruption products indicate magma eruption limited during 2003-2004. Those may suggest that the eruptive activity almost ends.