Low-frequency submarine volcanic swarms at the southwestern end of the Okinawa Trough

C. H. Lin*, L. W. Hsu, M. Y. Ho, T. C. Shin, K. J. Chen, Y. H. Yeh

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

10 引文 斯高帕斯(Scopus)

摘要

A low-frequency (LF) submarine volcanic swarm has been first observed at the southwestern end of the Okinawa Trough where some submarine volcanoes have recently been identified. A swarm of more than 24 earthquakes was recorded at land seismic stations in Taiwan between September 1st and September 4th, 2006. These earthquakes without clear S-arrivals were substantially different from other abundant tectonic earthquakes in the area. The dominant frequency of around 1 or 2 Hz recorded at all stations shows that the LF seismograms were generated by neither path nor site effects, but directly from the source. These LF earthquakes can be characterized as B-type volcanic earthquakes, which have been observed in some active volcanoes before significant eruptions. The observations of these LF volcanic earthquakes beneath submarine volcanic cones and seamounts are strong indicator that some submarine volcanoes are still active at the southwestern end of the Okinawa Trough.

原文英語
文章編號L06310
期刊Geophysical Research Letters
34
發行號6
DOIs
出版狀態已發佈 - 2007 三月 28

ASJC Scopus subject areas

  • 地球物理
  • 地球與行星科學(全部)

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