The next big earthquake. A perilous wildfire season. Steph Curry breaking both ankles simultaneously. California definitely has its share of potential disasters – but one you might not normally think of are volcanoes. Give Andy Calvert a few minutes and maybe he can change that. Calvert is the scientist-in-charge at the California Volcano Observatory in Menlo Park and Moffett Field, a U.S. Geological Survey facility that studies our local volcanoes. Yes, they exist: The early-1900s eruption of Lassen Peak devastated the surrounding region and spread ash all the way to Nevada. Eruptions aroun...