Watch the animals if they get restless or take off! This one guy always read the Newspapers for the count of lost animals/ pets before an Earth Quake hit. There are videos about that! https://annlrd.wordpress.com/nature-can-animals-predict-disaster-earthquakes-pbs/
Now this one could cause an Instant Ice Age with it’s ash blocking the sun for months. The Animals before in Wisconsin died with in a week just from breathing in the glass ash, besides there was no more food to graze on any way. Mega in more ways then size with this one happening because this one has been building up for thousands of years!
Snow suits , goggles and fine filtered masks ! How would you prepare for this one? Stock pile your Fuel, as no solar on this one during the ash cover skies. Careful of ventilation with fuel, how to filter shelter air, with all that ash in skies and covering everything! So a couple Years supply of water, canned / jars of food, etc. ? Yikes! A rough one this! Happened so many thousands of years ago, so no records besides the animal bones found to check out for any answers?
This one would effect the whole Globe / World. Oh yes, this is the one even my son is concerned about.