Oh! I thought I had said. Sorry!
The army here, or somebody, had discovered some ordnance left over from WWII and they were exploding it at the air force base about 1.3km away. So, it was totally expected and theoretically controlled.
I heard the boom, but it surprised me that the house shook significantly. I thought I was further away than that.
I missed the backstory, sorry!
I only have about 10 minutes a day on FR right now so I’m missing a lot.