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The Sciences

SI/USGS Weekly Volcano Activity Report for 4/22-28/2009

Rocky PlanetBy Erik KlemettiApril 29, 2009 11:19 AM

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The weekly USGS/SI roundup is out. Highlights (beyond Slamet) include:

  • Explosions (some heard 25 km away) and incandescent blocks that started fires at Galeras, Colombia.

  • Ash and tephra being thrown tens of meters into the air and a 4-m tall spatter cone being built at Pacaya, Guatemala

  • Also in Guatemala, Santa Maria's Santiaguito dome produced ash plumes and explosions.

  • Steam, ash and sulfur odors from the continuing eruption at Redoubt, Alaska.

  • Increased seismicity, steam and ash plumes along with a thermal anomaly at El Reventador in Ecuador

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