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Ash clouds threaten air traffic

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Old 11th Jun 2010, 10:53
  #3081 (permalink)  

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I hope the British Government is chartering some cattle boats to get the football hooligans (and that's just the players) back from RSA next week if it does kick off
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Old 12th Jun 2010, 00:24
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Yesterday's total was three quakes under Eyja-jokull and five under Myrda-jokull/Katla. We need to get those Strats, Connies and DC-3s back into production. Low level flying with piston engine power is the way to go.
 
Old 12th Jun 2010, 10:22
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The data from the earthquake monitors is pretty useless if we don't know how to analyse it. The tremor levels are very low, especially those closest to the Katla volcano. If you go and look at earthquake maps of other places in Iceland you'll see that minor quakes happen there all the time. Actually, the volcanic eruption probably obscured a lot of these quakes in the background tremor. What's more, these recent earthquakes around Katla have high error factors on them and are at very shallow depth. The Icelandics don't seem too concerned!
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Old 12th Jun 2010, 12:24
  #3084 (permalink)  
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Yes, these quakes are very small as compared with those occurring around the Pacific Rim on a daily basis but Katla tends to blow without warning, these small tremors are the only indicator we have. What worries me is that the quakes are so near the surface, indicative of something imminent.

I look forward to hearing Wright Turbo-Cyclones and Bristol Centaurus engines droning overhead.

Last edited by mike-wsm; 12th Jun 2010 at 12:38. Reason: nostalgia
 
Old 12th Jun 2010, 13:59
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I look forward to hearing Wright Turbo-Cyclones and Bristol Centaurus engines droning overhead.
Along with the smell of hot castor oil.
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Old 12th Jun 2010, 15:55
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G-G ,go to a Classic race day,it`s the smell of Castrol R you want.....
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Old 11th Aug 2010, 08:16
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Another explanation of some of the difficulties of predicting ash clouds.

Elegant Figures : Blogs
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Old 11th Aug 2010, 13:54
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Beautiful imagery - but still fails to address the key problem: timeliness. I assume at least some of the satellites in use were in polar orbits, so there's a variable delay before the patch of atmosphere you want gets imaged. Geostationary sats are (maybe...) too far out to deliver the detail needed and anyway don't carry the relevant sensors. (I may be entirely wrong on this.)
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Old 8th Sep 2010, 11:40
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Icelandic conference

Apparently there is a conference in Keflavik next week with an assembly of assorted experts to consider the lessons of the great volcanic ash drama - and presumably to suggest future measures. Anybody going - or have any idea which way the wind might blow (sorry!) there?

SB
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Old 8th Sep 2010, 13:26
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Originally Posted by scotbill
Apparently there is a conference in Keflavik next week with an assembly of assorted experts to consider the lessons of the great volcanic ash drama - and presumably to suggest future measures. Anybody going - or have any idea which way the wind might blow (sorry!) there?

SB
Well I suppose we might get to know about the huge pile of damaged jet engines resulting from the decision to fly through non-zero levels of ash, reports of which remain absent from this site...

Or maybe not.
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Old 8th Sep 2010, 13:43
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Originally Posted by scotbill
Apparently there is a conference in Keflavik next week with an assembly of assorted experts
Would these be the same assorted experts who did such a ridiculous job of handling the situation in the first place ?

Have they invited anybody with a view other than their own one ?
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Old 8th Sep 2010, 13:44
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Beautiful imagery - but still fails to address the key problem: timeliness. I assume at least some of the satellites in use were in polar orbits, so there's a variable delay before the patch of atmosphere you want gets imaged. Geostationary sats are (maybe...) too far out to deliver the detail needed and anyway don't carry the relevant sensors. (I may be entirely wrong on this.)
Geosats are very capable of delivering ash cloud information...but the problem for places like iceland is that the spatial resolution is quite poor (due to the angle between iceland and the equator):
EUMETSAT IPPS animation - Meteosat 0 degree Ash Iceland

Our geo satellites contain all the sensors needed for ash analysis. Although, as always, additional sensors would be an improvement (which will arrive in 2015).

On the plus side, because iceland is near the poles we gain a lot of high resolution polar data at high frequency - we can gain 5-6 images of iceland per day from polar sensors.

(edit) Oh, just noticed that the post was a month old. Apologies.
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Old 8th Sep 2010, 15:44
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Before getting the Connies out in the air(*) I have been told that a US airline is suing an hollywood production firm for over a billion US$ for loss of revenue because this firm had placed high explosive charges near Eyjafjallajokull to start an eruption for film footage (for a mega production to come) a few days before the full eruption.
Could not find any confirmation of this on the web. Anyone heard something or is it just a wild story ?

(*) restauring a Connie to full flying status is extremely expensive and a very lenghty process as the Lufthansa staff in Berlin can tell you :They try since 2 years to get one in the air from 2 "good" airframes,but they are still years away .
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Old 8th Sep 2010, 20:06
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Really? I doubt it though, if it did it would have to be a hell of a lot of 1.1 high explosives buried deep within the volcano a rather expensive do, surface explosions the gases are released upwards, with very little effect downwards.
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Old 4th Nov 2010, 09:36
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European volcanic upset could have been avoided

Good article in Flight international
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Old 6th Nov 2010, 12:40
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SIA cancels Jakarta flights

Well Merapi has only be chuffing away for 12 days and QF has had two engines fail on climb out of Singapore so I guess a little respect for mother nature is probably overdue.
If ash forms a hard glaze on the hotsurfaces then I suppose the risk of blades being heavier than designed might stress an engine if the glaze is not dealt with.
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Old 6th Nov 2010, 13:47
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Airlines stop Jakarta flights after volcano blast - Yahoo! News

here we go again....flights cancellations.
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Old 11th Feb 2011, 10:19
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False Alarm. Iceland Met Says No Imminent Threat of Eruption

A story has been making the rounds in the British press and elsewhere that an eruption is imminent in Bárdarbunga in Vatnajökull. The news seems to be based on a misunderstanding of a TV interview with a specialist at the Icelandic Met Office earlier this week.
http://www.icelandreview.com/iceland..._0_a_id=373779
 
Old 12th Feb 2011, 10:27
  #3099 (permalink)  

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European volcanic upset could have been avoided

20/20 hindsight from Learmont
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Old 12th Feb 2011, 10:45
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Didn't I read somewhere, once upon a time, that there are
constant volcanic eruptions occuring all round the World?
Minor ones, admittedly, but most pumping loads of crap into
the atmosphere.
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