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SI/USGS Weekly Volcano Activity Report for 4/15-21/2009

Your weekly roundup of volcano news, including a big spike in sulfur dioxide emissions from Kilauea.

Has a week gone by already? It is time for another USGS/Smithsonian GVP Weekly Volcano Activity Report.

Highlights (beyond Fernandina, Pagan and Redoubt) include:

  • A new underwater eruption at NW-Rota 1 in the Mariana Islands.
  • Increasing seismicity and incandescence from the rhyolite domes forming at Chaiten, Chile.
  • A spike in sulfur dioxide emissions from Kilauea, Hawai’i to 700 tonnes/day (up from a 2003-07 average of 150 tonnes/day).
  • 4.5-7.5 km / 15-26,000 foot ash columns produced at Shiveluch in Kamchatka from new lava dome.
  • Continued dome growth and ~6 km / 26,000 foot ash columns from Nevado del Huila, Colombia.
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