Iceland Volcanic Eruption [Spectacular Pics of Lightning and Fire]

Telegraph(UK) ^ | April 19, 2010

[little jeremiah]

I should read the whole thread before posting like an idiot.

[Steve Van Doorn]

thanks those are all great pics

[Fichori]

Regarding lighting and volcanoes...

The earth’s atmosphere has a voltage gradient. (the higher you go, the higher the voltage)

Volcanoes emit ionized gases (among other things), which are conductive.

So when you have a large conductive column stretching up into to the sky (think huge capacitor and path of least resistance), you’ll get a few sparks.

FYI.

[Steelfish]

Thanks for that explanation brings backs my rusty physics.

[Star Traveler]

Volcanic ash cloud: Pilots warn against 'rash' decisions to allow flights

European airline pilots warn governments about engine failures caused by ash amid pressure to get flights moving again

Pilots warn against ‘rash’ decisions to allow flights through the volcanic ash cloud amid pressure to get flights started again. Photograph: Gonzalo Fuentes/Reuters

European airline pilots warned governments and safety regulators today against making "rash" decisions to allow planes to fly through volcanic ash clouds amid growing pressure from airlines across Europe to create "safe flying corridors" to get flights moving again.

The pilots' intervention came as air traffic controllers dashed hopes that flights would resume from London Heathrow, Gatwick and Stansted this evening by announcing that most UK airspace would remain closed until 1am tomorrow. Airlines said the restrictions, which meant only a few flights took off from airports in Scotland and northern England, were an over-reaction.

BA announced tonight it was cancelling all flights until midday tomorrow.

The UK's air safety watchdog, the Civil Aviation Authority, is holding meetings with national air traffic controllers, airline executives and Lord Adonis, the transport secretary, to discuss flying through zones with small amounts of ash. But the European Cockpit Association, told the Guardian today that any attempts to establish "safe flying corridors" through airspace where ash was present should not be rushed.

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