Just for reference to what kind of damage a volcanic eruption can do....for tens of miles distant from the Volcano.
Also....for those operating aircraft and vehicles in volcanic dust.....it is very abrasive pumice.
Inspect your aircraft very...very carefully to include inside the gearboxes and engines....bearings...bushings....everything.
https://www.livescience.com/27553-mo...-eruption.html
https://rarehistoricalphotos.com/eru...t-helens-1980/