Why stop with fracking. They should expand their investigation to include leprechauns, unicorns, black holes, the devil’s triangle, and global warming.
They might want to look into the possibility of Big Foot causing them as well. Who knows? What with all the stomping around he does with those big feet, it *could* cause quite a disturbance in the Earth's crust.
They might also look into the possibility that CA might capsize due to all this potential phenomena, along the lines of prior Dem brain trust concerns about Guam.