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モノワイ海底火山

Monowai

成層火山 · New Zealand · 132m (海底)

Map view shows Monowai submarine volcano at the lower left, with subsidiary cones on its N flank. A large submarine caldera lies to the NE at the top-right. The contour interval is 100 m and the resolution of the bathymetry data is 25 m. The proprietary bathymetry data were obtained by scientists of the New Zealand National Institute of Water and Atmospheric Research (NIWA) during a 2005 New Zealand-American NOAA Ocean Explorer research expedition to the Kermadec-Tonga Arc.
Map view shows Monowai submarine volcano at the lower left, with subsidiary cones on its N flank. A large submarine caldera lies to the NE at the top-right. The contour interval is 100 m and the resolution of the bathymetry data is 25 m. The proprietary bathymetry data were obtained by scientists of the New Zealand National Institute of Water and Atmospheric Research (NIWA) during a 2005 New Zealand-American NOAA Ocean Explorer research expedition to the Kermadec-Tonga Arc. · 写真: Image courtesy of Ian Wright, 2005 (NIWA; http://oceanexplorer.noaa.gov/explorations/05fire). · Wikimedia Commons
タイプ
成層火山
国
New Zealand
地域
Tonga-Kermadec Volcanic Regions / Northern Kermadec Volcanic Arc
標高
132m (海底)
座標
-25.887, -177.188
最終噴火
2014年
テクトニクス環境
Subduction zone / Oceanic crust (< 15 km)
火山地形
Composite
主要岩石
Basalt / Picro-Basalt
地質学的概要

Monowai, also known as Orion seamount, is a basaltic stratovolcano that rises from a depth of about 1,500 to within 100 m of the ocean surface about halfway between the Kermadec and Tonga island groups, at the southern end of the Tonga Ridge. Small cones occur on the N and W flanks, and an 8.5 x 11 km submarine caldera with a depth of more than 1,500 m lies to the NNE. Numerous eruptions have been identified using submarine acoustic signals since it was first recognized as a volcano in 1977. A shoal that had been reported in 1944 may have been a pumice raft or water disturbance due to degassing. Surface observations have included water discoloration, vigorous gas bubbling, and areas of upwelling water, sometimes accompanied by rumbling noises. It was named for one of the New Zealand Navy bathymetric survey ships that documented its morphology.

Wikipedia の要約

英語版の要約

Monowai Seamount is a volcanic seamount to the north of New Zealand. It is formed by a large caldera and a volcanic cone just south-southeast from the caldera. The volcanic cone rises to depths of up to 100 metres (330 ft) but its depth varies with ongoing volcanic activity, including sector collapses and the growth of lava domes. The seamount and its volcanism were discovered after 1877, but only in 1980 was it named "Monowai" after a research ship of the same name.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
1944~1951 · 1件 · 最大 VEI 01973~1980 · 4件 · 最大 VEI 11980~1987 · 3件 · 最大 VEI 01987~1994 · 2件 · 最大 VEI 01994~2002 · 5件 · 最大 VEI 02002~2009 · 6件 · 最大 VEI 02009~2016 · 6件 · 最大 VEI 119441958198019942009

詳細タイムライン

  1. 2016年VEI 0地質学的推定
    2016-11-11 ~ 2016-11-12
  2. 2014年VEI 1観測記録
    2014-01-01 ~ 2014-01-01
    Summit
  3. 2014年VEI 0観測記録
    2014-10-16 ~ 2014-11-05
    Submarine
  4. 2012年VEI 0観測記録
    2012-08-03 ~ 2012-08-19
    Submarine
  5. 2011年VEI 0観測記録
    2011-05-17 ~ 2011-05-22
    Summit Crater
  6. 2009年VEI 0観測記録
    2009-05-04 ~ 2009-12-16
  7. 2008年VEI 0観測記録
    2008-02-08 ~ 2008-02-08
  8. 2006年VEI 0観測記録
    2006-12-12 ~ 2007-11-04
  9. 2005年VEI 0観測記録
    2005-03-02 ~ 2006-06-27
  10. 2003年VEI 0観測記録
    2003-04-10 ~ 2004-09-16
  11. 2002年VEI 0観測記録
    2002-05-24 ~ 2002-05-24
  12. 2002年VEI 0観測記録
    2002-11-01 ~ 2002-11-24
  13. 1999年VEI 0観測記録
    1999-06-06 ~ 1999-06-11
  14. 1997年VEI 0観測記録
    1997-04-18 ~ 1997-04-21
  15. 1997年VEI 0観測記録
    1997-12-15 ~ 1998-02-04
  16. 1996年VEI 0観測記録
    1996-09-20 ~ 1996-09-22
  17. 1995年VEI 0観測記録
    1995-11-27 ~ 1995-11-30
  18. 1990年VEI 0観測記録
    1990-05-30 ~ 1991-03-25
  19. 1988年VEI 0観測記録
    1988-09-08 ~ 1988-09-08
  20. 1986年VEI 0観測記録
    1986-06-16 ~ 1986-06-16
  21. 1982年VEI 0観測記録
    1982-05-16 ~ 1982-05-16
  22. 1980年VEI 0観測記録
    1980-01-16 ~ 1980-01-16
  23. 1979年VEI 1観測記録
    1979-02-16 ~ 1979-04-19
  24. 1978年VEI 0観測記録
    1978-02-16 ~ 1978-07-16
  25. 1977年VEI 0観測記録
    1977-04-16 ~ 1977-04-16
  26. 1977年VEI 0観測記録
    1977-10-17 ~ 1977-10-27
  27. 1944年VEI 0地質学的推定
    1944 ~ 進行中

外部リンク

⚠ 参考情報です。緊急対応には使用しないでください。