It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
No aircraft can risk flying through the cloud - the chances of choking the engines and stalling the plane are high. And so we have to twiddle our thumbs until Eyjafjoll decides she has let off enough steam.
If Eyjafjoll is anything like Grimsvotn, the eruption will peter out in a day or two, but there is a chance that things could go on for a lot longer.
"We suspect it will end today or tomorrow, but it could last for weeks, months or even years," Thordarson says.
And even if Eyjafjoll goes quiet again soon, that doesn't mean she has finished yet.
"The last time Eyjafjoll erupted [in 1823], it lasted for more than a year, so we could see more of the same disruption over the coming months," says Bill McGuire, director of the Aon Benfield UCL Hazard Research Centre at University College London.