Skip to content
Guest Thinkers —

SI/USGS Weekly Volcano Activity Report for 4/29-5/5/2009

The latest, greatest news of volcanism worldwide.
Sign up for Big Think on Substack
The most surprising and impactful new stories delivered to your inbox every week, for free.

All the eruptions fit to print from the Smithsonsian/USGS GVP Weekly Report.

A few highlights (not including Redoubt, Rinjani and Slamet):

  • Multiple ash plumes from Galeras (Colombia), some producing noticeable ash fall up to 35 km from the vent.
  • The Alert Level at Anak Krakatau, Indonesia was raised to 3 (out of 4) after a sharp increase in the number of explosions.
  • The Alert Level at Cleveland in Alaska was lowered from Yellow to “Unassigned” (no Green for Cleveland as there is no real-time seismic network for the volcano, thus no “background levels” to compare.)
  • Ebeko in Russia continues to produce ash plumes that reach 2-3.5 km / 6-10,000 feet.
  • Incandescence, gas emissions and 2.4 / 8,000 foot ash plumes continues to be observed from the Tavurvur vent at Rabaul, Papua New Guinea.
    • Sign up for Big Think on Substack
    The most surprising and impactful new stories delivered to your inbox every week, for free.
    Related
    Up Next