Pacific_Ring_of_Fire http://en.wikipedia.o

Thomas Page

Pacific_Ring_of_Fire http://en.wikipedia.org/wiki... , http://en.wikipedia.org/wiki... , Volcanic Ash and Volcanic Dust | Photos, Satellite Images, More - http://geology.com/article...

Apr 19, 2010 from

John (bird whisperer) liked this

pstp hist pnw geol (Sunday, May 18, 1980) "As an ash plume moves away from the volcanic vent it no longer has the rush of escaping gases to support it. The unsupported ash particles begin to fall out. The largest ash particles fall out first and the smaller particles remain suspended longer. This can produce an ashfall deposit on the ground below the ash plume. These ashfall deposits are generally thickest near the vent and thin with distance. A map showing the ash distribution from the May 18, 1980 eruption of Mount St. Helens is shown at right." - Thomas Page

I wonder why there would be an isolated spot in Oklahoma. - John (bird whisperer)

? :) http://www.mountsthelens.com/history... Clear skies permitted tracking the advance of the drifting cloud by satellite imagery. Moving at an average speed of about 60 miles an hour, the cloud reached Yakima, Washington, by 9:45 a.m. PDT and Spokane, Washington, by 11:45 a.m. The ash cloud was dense enough to screen out nearly all sunlight, activating darkness-sensitive switches on street lights in Yakima and Spokane. Street lights remained on for the rest of the darkened day, as the eruption continued vigorously for more than 9 hours, pumping ash into the atmosphere and feeding the drifting ash cloud. The eruptive column fluctuated in height through the day, but the eruption subsided by late afternoon on May 18. By early May 19, the eruption had stopped. By that time, the ash cloud had spread to the central United States. Two days later, even though the ash cloud had become more diffuse, fine ash was detected by systems used to monitor air pollution in several cities of the northeastern United States. Some of the ash drifted around the globe within about 2 weeks. After circling many more times, most of the ash settled to the Earth's surface, but some of the smallest fragments and aerosols are likely to remain suspended in the upper atmosphere for years. ps5-18 http://www.columbian.com/stories... , http://www.boston.com/bigpict... - Thomas Page

. - Thomas Page

Dirty Rain northwest-mystery-ash http://edition.cnn.com/2015... http://www.usatoday.com/story... http://www.tri-cityherald.com/2015... suspects http://en.wikipedia.org/wiki... http://en.wikipedia.org/wiki... http://en.wikipedia.org/wiki... http://en.wikipedia.org/wiki... Cliff Mass Blog http://cliffmass.blogspot.com http://en.wikipedia.org/wiki... http://www.esrl.noaa.gov/psd... 2 -8 sort http://www.capitalpress.com/2015020... ? 2 -9 http://www.oregonlive.com/environ... spots on eyeglasses - Thomas Page

Friends

Login

Service