Guys, I've been looking into the area where the 5.3 earthquake hit this morning. It was a big gold boom town back in the day. It was called Bodie, CA and was about 20 miles from Auarora,NV Mark Twain's home. If you look at it on google maps it's littered with mine tunnels,Here is the coordinates of the Standard Mine in Bodie. 38.20000,-119.01000
Mark Twain made a joke about a guy who could only spell his name one way. The town was originally named after a dude named Bodey who left his wife and kids back east and set sail to find gold in California. The area is off limits to the public because of all the open mines but there is an old mining town tourist trap you can visit. It's was declared a historic park in 1962. I'm thinking a 5.3 earthquake 6 miles deep sounds like it might collapse some of them mines.
I also thought this was interesting "completely isolated"
The Bodie & Benton Railway was a 3 ft (914 mm) narrow gauge common carrier railroad in California, from the Mono Mills to a terminus in Bodie, now a ghost town, in Mono County. It was unusual among U.S. railroads in that it was completely isolated from the rest of the railroad system.