The last time Eyjafjallajökull erupted, it lasted 2 years stretching from 1821-1823. It also erupted in 920 and 1612. Eyjafjallajökull’s eruption usually precedes an eruption for another Icelandic volcano called Katla, as it did in 1823. Katla’s eruptions are usually more violent than Eyjafjallajökul’s.
What bugs me is that none of the authorities have told us how long the air traffic was disrupted in 1821.
Conspiracy? I think so.