I was living in MN, fresh on my first post-college job, when it blew. No effects there . . . but much discussion about the fate of one Harry Truman, a stubborn old codger who refused to leave his home near Spirit Lake when warned about the pending eruption. Having lived there a good portion of his life, he just KNEW it wouldn't blow . . . he just KNEW it.
To paraphrase Mark Twain, it goes to show that it's not the things we don't know that get us in trouble, it's the things we know for sure that just ain't so.