I don’t know if you saw it, but we had a big explosion in a neighborhood in Indianapolis a short while back. It happened a ways south of me at about 11PM. Well, I heard it and thought it was a storm. It wasn’t. It was a criminal act and the people responsible have been charged.
My point is, how far and wide did people hear this?
If there is no other logical explanation, it could be pre quake activity.
I think you are correct. No proof, only experience to type from. I’m southeast of you by about 400 miles. Since the eastern fault was active last year it stands to reason, with logic, the Big Fault Line in the middle of the country was put under stress. (imho)