Volcano - Mount Redoubt, Alaska - Resources

[kea001]

From: CNN
Will volcano blow? Expert waits, watches, ready to warn

"For jet aviation, it's a very severe hazard because jet engines run at a very high temperature. And once that silica-rich ash gets ingested into the engine, it can remelt and coat the insides of the engines and freeze up those engines," says Coombs. "That's really the major thing we are trying to avoid here."

The day after the 1989 eruption of Redoubt, a 747 flew into an ash cloud near Anchorage and all four engines stalled. The pilot was able to get two of the engines restarted, and the plane landed safely. Coombs says airspace around the volcano and Anchorage may be closed if Redoubt erupts.

http://www.cnn.com/2009/TECH/science/02/02/alaska.volcano/index.html

Alaska Volcano Observatory
http://www.avo.alaska.edu/activity/Redoubt.php


AVO on Twitter

Redoubt: Seismic activity at Redoubt continues at an elevated level and is well above background levels. The volcano has not erupted.A gas/observation overflight yesterday reported continued changes in the summit glaciers indicative of heating of the summit area. Photos from both the overflight and the hut webcam showed a small vapor plume at the summit. The web camera is now dark as our long winter night continues.

http://twitter.com/alaska_avo

Anchorage Sunrise and Sunset table
http://www.timeanddate.com/worldclock/astronomy.html?n=18&month=2&year=2009&obj=sun&afl=-11&day=1

Mt. Redoubt, Wikipedia
http://en.wikipedia.org/wiki/Mount_Redoubt_(Alaska)

[kea001]

http://www.avo.alaska.edu/rsam/rsam.php?volcname=Redoubt

2009-03-22 22:56:25 - VAN/VONA
An eruption of Mt. Redoubt began at approximately 22:38 AKDT, March 22, 2009 (0638 UTC). AVO is raising the aviation color code to Red and the alert level to Warning. Initial height of the eruption cloud is estimated at less than 20,000 ft above sea level at present. Further reports will be issued as more information becomes available.

2009-03-22 23:26:32 - VAN/VONA
The eruption of Mt. Redoubt continues. The height of the eruption cloud is estimated to be 50,000 ft above sea level. Further reports will be issued as more information becomes available.

http://www.avo.alaska.edu/activity/Redoubt

[dska22]

hmm...  CNN's description of a 747 losing all 4 engines sounds eerily similar to that BA plan near Indonesia in 1982.  Never heard of the 1989 incident, though.  Glad that one worked out alright too.  I can't imagine what those passengers felt when all they heard was a gentle whoosh going by and no engine noise.

[MathFox]

There was a KLM plane flying through a previous redoubt ash cloud: http://en.wikipedia.org/wiki/KLM_Flight_867
(The plane was on descent to Anchorage when it hit the cloud, so the engines would have been at flight idle.)

[aevins]

FAA: https://employees.faa.gov/org/linebusiness/ato/news/spotlight/story/index.cfm?newsId=58160

[kea001]

Thanks for the link. One can never have too many links.