My off-the-cuff guess is high-2s to mid-3s. <JeremyClarkson>To find out, I went to wikipedia.</JeremyClarkson> (I think I've been watching too much Top Gear again...)raptor wrote:I used to live near train tracks. I wonder what that rumble would register on the Richter scale.
Edit: Neither Wikipedia or Google seem to know, but I've had to cut my search short because I need to get back to work.