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A word about Big Ideas and Themes — The architecture of Big Think

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Themes are the seven broad umbrellas under which we organize the hundreds of big ideas that populate Big Think. They include New World Order, Earth and Beyond, 21st Century Living, Going Mental, Extreme Biology, Power and Influence, and Inventing the Future.

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SI/USGS Weekly Volcano Activity Report for 9/30-10/6/2009

October 9, 2009, 9:01 AM

Somehow I missed a week of the SI/USGS Weekly Volcano Activity Reports and almost missed another. Here is this week's update!

Highlights (not including Chaiten, Soufriere Hills or Cleveland) include:
  • The alert level at Galeras in Colombia was raised to Red after an explosion on September 30 and returned to orange ... and then yellow ... after activity tapered.
  • Sakurajima in Japan produced 1.8-4.3 km / 6,000-14,000-tall ash-and-steam plumes, along with incandescent tephra that was thrown almost two kilometers from the vent.
  • Multiple steam-and-ash plumes reached 4.3 km / 14,000 feet at Langila in the New Britain Islands.
  • Sangay in Ecuador produced ash plumes that reached as high as 7.6 km / 25,000 feet.

SI/USGS Weekly Volcano Acti...

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