Lake Tahoe tsunami, while unlikely, still possible, California state geologist says

Frequent earthquakes across Northern California over the last several weeks have spurred questions about the natural disasters ahead.

California Geological Survey geologist Steve Bohlen says the region has recently experienced quakes in rapid succession.  "We happen to be in a bit of an active period right now," Bohlen observed to CBS Sacramento. At the end of April, a 3.8-magnitude earthquake hit the center of Lake Tahoe, followed by a 4.7-magnitude earthquake in Truckee, California that was felt from Sacramento all the way to Reno.