Volcanic and Seismic Activity at Mount Erebus, Antarctica

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  • 南極・エレバス火山の活動
  • ナンキョク エレバス カザン ノ カツドウ

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Abstract

Mt. Erebus, the most active volcano on the Antarctic continent, was discovered by Sir James Ross on January 27, 1841. Since this time, some volcanic activities such as steam eruptions, reflection of glow, volcanic flame, lava lake in crater etc., have been observed on and off. Steam eruptions have been occurred frequently since the end of 1972. For the purpose of observing small/micro earthquakes around McMurdo Sound and Mt. Erebus, seismological observations were carried out in the austral summer seasons of 1974-75 and 1975-76, as one of the research programs of the Dry Valley Drilling Project (DVDP) which was carried out by scientists from Japan, New Zealand and the United States. Background seismicity in and around the McMurdo Sound area is estimated to be one small/micro earthquake every two days. In addition to this background seismicity, one earthquake occurs in every two days in the volcanic area around Mt. Erebus.

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