The Sciences

SI/USGS Weekly Volcano Activity Report for 8/5-11/2009

Rocky Planet iconRocky PlanetBy Erik KlemettiAug 12, 2009 6:59 PM


Sign up for our email newsletter for the latest science news

Even the SI/USGS Weekly Volcano Report seems a little light -- welcome to the dog days of summer!

Highlights from this week's report include:

  • "Thunderous sounds", incandescence and small plumes (hundreds of meters) with more frequent seismicity at Ibu in Indonesia.

  • A sharp increase in sulfur dioxide output was noted at Mayon in the Philippines on August 4 - from ~700-900 tonnes/day to almost 2,000 tonnes/day.

  • ~3,000 meter/10,000 foot gas-and-ash plume from Bagana in Papua New Guinea - you can see it on this recent NASA Earth Observatory image.

  • Ash/gas plumes from Sakurajima in Japan rose to ~2-4 km / 6,000-13,000 feet and were accompanied by explosions.

  • Shiveluch in Kamchatka continues to produce 4-8 km / 13,000-25,000 foot ash plumes related to the dome emplacement/collapse that has been ongoing for the summer. The thermal anomaly at the summit continues to grow, indicating that new lava is causes the dome to grow significantly.

1 free article left
Want More? Get unlimited access for as low as $1.99/month
Already a subscriber? Log In or Register
1 free articleSubscribe
Want unlimited access?

Subscribe today and save 70%


Already a subscriber? Log In or Register
More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Our List

Sign up for our weekly science updates.

To The Magazine

Save up to 70% off the cover price when you subscribe to Discover magazine.

Copyright © 2021 Kalmbach Media Co.