According to today’s CNN.com:
Mystery Quakes Confuse Experts
Experts are mystified by what they call a “swarm” of earthquakes hitting Reno, Nevada. Tremors aren’t uncommon in Reno, but analysts just do not know what has caused 344 quakes in the area in the past week, the strongest of which was magnitude 4.7.
Clearly, they’re choosing to ignore the obvious: giant subterranean man-eating worms.