火山

ハワイ島キーラウエア火山

米国地質調査局USGSによる、2009年11月21日のキーラウエア火山ハレマウマウ火口での小爆発のビデオ。

This Quicktime movie (at x2 speed) shows a small explosive event in the Halema`uma`u vent at 9:20am.  The explosion was immediately preceded by a portion of the vent rim collapsing into the vent cavity.  The brown plume rises rapidly from the vent, and in the full resolution video large particles can be seen ejected in front of the plume.  In the video shown here, it is possible to see some of these particles impact the crater wall—look for several small white puffs to appear on the crater wall just ahead of the rising brown plume (about 7-9 seconds into the video clip).  No ejecta was found at the Halema`uma`u Overlook, indicating that few, if any particles, reached the crater rim.

2009年12月28日のキーラウエア火山ハレマウマウ火口の噴気功の中200メートルほど奥に見えた溶岩。米国地質調査局USGSによるビデオ

This Quicktime movie shows a draining event in the lava pond within the Halema`uma`u vent cavity.  The lava column exhibited cycles of filling and draining of the vent cavity, with each cycle lasting a few minutes.  As the pond drains, lava cascades into a small hole on the east side (right) of the cavity floor.  Also, lava that was covering a large bench to the west of the main pond drains back, with large plates of crust sliding over the edge.

今年はどのような火山活動が起きるのでしょうか。楽しみです。展望台から見えるようになる日が来るでしょうか。

 


2010-01-15 | Posted in 火山No Comments » 
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