Mark Sudduth
EF1
http://forecast.weather.gov/wwamap/wwatxtget.php?cwa=usa&wwa=Ashfall Advisory
That is a new one for me. Makes sense but never seen it before.
That is a new one for me. Makes sense but never seen it before.
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After witnessing the continued decrease of involvement in the SpotterNetwork staff in serving SN members with troubleshooting issues recently, I have unilaterally decided to terminate the relationship between SpotterNetwork's support and Stormtrack. I have witnessed multiple users unable to receive support weeks after initiating help threads on the forum. I find this lack of response from SpotterNetwork officials disappointing and a failure to hold up their end of the agreement that was made years ago, before I took over management of this site. In my opinion, having Stormtrack users sit and wait for so long to receive help on SpotterNetwork issues on the Stormtrack forums reflects poorly not only on SpotterNetwork, but on Stormtrack and (by association) me as well. Since the issue has not been satisfactorily addressed, I no longer wish for the Stormtrack forum to be associated with SpotterNetwork.
I apologize to those who continue to have issues with the service and continue to see their issues left unaddressed. Please understand that the connection between ST and SN was put in place long before I had any say over it. But now that I am the "captain of this ship," it is within my right (nay, duty) to make adjustments as I see necessary. Ending this relationship is such an adjustment.
For those who continue to need help, I recommend navigating a web browswer to SpotterNetwork's About page, and seeking the individuals listed on that page for all further inquiries about SpotterNetwork.
From this moment forward, the SpotterNetwork sub-forum has been hidden/deleted and there will be no assurance that any SpotterNetwork issues brought up in any of Stormtrack's other sub-forums will be addressed. Do not rely on Stormtrack for help with SpotterNetwork issues.
Sincerely, Jeff D.
Never seen this before- ashfall advisory
- Thread starter Mark Sudduth
- Start date
Billy Griffin
Just got back from Dutch Harbor. The volcano is quite active at this point.
Tim Vasquez
EF5
- Joined
- Dec 4, 2003
- Messages
- 3,411
Not only that but we appear to have a second volcano:
Tim
I did look at the GOES imagery and it's barely showing anything if at all. The IR channel shows a little faint smudge of something today at Okmok starting on the 1930Z frame, but it's barely visible and I'm inclined to believe it might be a little puff of volcanic ash.
Tim
Dennis Sherrod
EF5
Angie Norris
EF5
That is an incredible image of the caldera. I didn't realize that smaller volcanoes would be contained within the caldera.
I found this article earlier this afternoon
http://www.sciencedaily.com/releases/2008/07/080720093810.htm
I found this article earlier this afternoon
http://www.sciencedaily.com/releases/2008/07/080720093810.htm
Tim Vasquez
EF5
- Joined
- Dec 4, 2003
- Messages
- 3,411
Just as an aside, this is the awesome Mt. Redoubt volcano explosion in 1990, on the northern fringes of the Aleutians (well, technically, just north of there):
Mt. Redoubt is 10,100 ft high, so a crude calculation based on the geometry of the image and assuming 60 km distant on the shot, tan (arcsin(45400ft from extrapolation/196800ft) * 196800 ft), places the top of the ash cloud seen here at at least 47,000 ft. I didn't account for Earth curvature as that's getting out of my league with trig, so it may be higher.
Tim
Mt. Redoubt is 10,100 ft high, so a crude calculation based on the geometry of the image and assuming 60 km distant on the shot, tan (arcsin(45400ft from extrapolation/196800ft) * 196800 ft), places the top of the ash cloud seen here at at least 47,000 ft. I didn't account for Earth curvature as that's getting out of my league with trig, so it may be higher.
Tim
Bill Schintler
EF4
RE: Ashfall advisory
Volcanic ash is a serious hazard for jet aircraft should one encounter it while in flight - bill
http://www.boeing.com/commercial/aeromagazine/aero_09/volcanic_story.html
Volcanic ash is a serious hazard for jet aircraft should one encounter it while in flight - bill
http://www.boeing.com/commercial/aeromagazine/aero_09/volcanic_story.html
Last edited by a moderator:
Angie Norris
EF5
Volcanic ash is rather nasty stuff composed mostly of sulfur particles and very small (2mm or less diameter) shards of glass formed from the eruption.
The sulfur particles not only lead to acid rain but are part of the mechanism behind global cooling since the particles reflect sunlight back out to space.
The glass particles are incredibly abrasive and if inhaled can combine with the moisture present in the lungs to form a concrete like substance and cause suffocation. If I remember correctly from Dr. Weaver's lecture on volcanic hazards, the primary threat to aircraft occurs when the ash is ingested into the aircraft engine, melts back into glass from the heat of the engine and then resolidifies causing potentially catastrophic engine damage and failure.
But you have to admit, those pyroclastic clouds are quite awesome...from a VERY respectful distance.
The sulfur particles not only lead to acid rain but are part of the mechanism behind global cooling since the particles reflect sunlight back out to space.
The glass particles are incredibly abrasive and if inhaled can combine with the moisture present in the lungs to form a concrete like substance and cause suffocation. If I remember correctly from Dr. Weaver's lecture on volcanic hazards, the primary threat to aircraft occurs when the ash is ingested into the aircraft engine, melts back into glass from the heat of the engine and then resolidifies causing potentially catastrophic engine damage and failure.
But you have to admit, those pyroclastic clouds are quite awesome...from a VERY respectful distance.
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