@catsalad Only felt one, on the Isle of Man at the end of the 1980s.

A few weeks earlier I'd looked out of the office window and was deeply astonished to see a steam train go past, as I was a long way from the line and out of sight. It was on the back of a truck, and it was so heavy, the entire building rumbled slightly.

A month or so later, it happened again, slightly more so... but this time, there was no truck. It was the ground. It just rumbled like a very long 100 tonne truck drove past slowly.