The thing I'm curious about is why this doesn't happen more often. Volcanic ash SIGMETs aren't that uncommon. Was it just the widely dispersed nature of this particular cloud?
The ash is usually ejected way higher into the atmosphere. The glacier in the way of this one meant the ash only got up as far as jet cruising altitude.
Anyway, good to see airspace re-opening. My boss is still stuck abroad though, unable to get back. It's been a pleasant time...
