James Bridle on Volcano Fiction:

I could, charmlessly and redundantly, expand on that to say: when life surprises us, making the everyday strange and wonderful, our first impulse is to make stories. These are of course personal stories: the volcano itself is too remote, too vast, to fit into our little narratives. Like Vonnegut’s glaciers, they just exist: human lives happen around them.

Also worth a look: Robin Sloan’s Ash Cloud Tales.