It’s the first I’ve heard of this recent phenomenon. And now that I’m doing a google search about it I see that yeah a lot of the people commenting are skeptical. But it was too cold to have thunder here I would think, and I found no evidence outside of what could have been making the repeated thumps. I’m by an expressway but am unfortunately all too familiar with the noises that generate from that, so there’s nothing to explain what I heard. Now I wish I’d paid more attention to it!