Here we go again.

After last year's misery from the Eyjafjallajökull eruption, now another Icelandic volcano, Grimsvötn, is causing a new round of worries.

More than 250 flights have already been canceled as a cloud of volcanic ash blows over Scotland. Most of Ireland, northern Wales, and northern England will see the ash later today.

Several Scottish airports have been affected, including major ones such as Edinburgh and Glasgow. Other airports that will likely have problems today include Londonderry, Prestwick, Durham Tees Valley, Newcastle, and Carlisle. Officials say the cloud should move on and flights from Edinburgh and Glasgow will resume this afternoon. Airports in the far north of Scotland should get the all-clear tomorrow. Of course, that's assuming there are no more eruptions or changes in the wind.

Luckily the wind has taken much of the ash away from populated areas, over the far north Atlantic, eastern Greenland, and north of Scandinavia.

Several airlines are not flying through Scottish airspace. You can see a full list here. Since the northerly route between Europe and North America passes through the ash cloud, transatlantic flights may have to be diverted, causing delays. Check ahead before going to the airport.

So far this doesn't look like another Eyjafjallajökull. The Grimsvötn eruption is smaller and the ash particles are bigger, meaning they fall to earth more quickly instead of hanging in the atmosphere for days.

Have your travel plans been affected by the Grimsvötn eruption? Tell us about it in the comments section!

[Photo courtesy Roger McLassus]

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