A similar series of eruptions happened in 2010. It’s bad, but not apocalyptic. Planes were diverted because of ash clouds for a bit, and IIRC a few people who didn’t heed the ample warnings died.

This should be like that.

e: hopefully nobody will be belligerent enough to ignore the warnings.

e2: from that article: ‘No human fatalities were reported from the 2010 eruption of Eyjafjallajökull’, thank goodness. I must have mixed it up with a different eruption. It seems like Iceland no longer fucks about with Mother Earth. I did read all nearby towns have been evacuated already.

So yeah, expect a light show and some short-term air travel disruptions in the northern hemisphere as the wind blows.