I didn’t mean it to dunk on Tesla, that dude rocked! I was just hoping to see the source of the claim. I went back to copy part of the page for this reply and apparently I missed the [4] so my comment was wrong. Here’s the relevant bit from that page which satiated my curiosity:
[…] he revealed that an earthquake which drew police and ambulances to the region of his laboratory
I didn’t think the bridge collapse was random, I was just commenting on the power of resonance. You can also shatter a glass with your voice if you can hold the frequency!
Thanks for the update! I guess I shouldn’t have taken him at his screenshot