There have been countless earthquakes around the globe. Now the volcanic eruption in Iceland leads many to wonder if California could be next. California is better known for its earthquakes, but there are volcanoes around, like Mammoth Mountain. Patt talks to a geologist to find out whether or not an eruption is in sight.
Margaret Mangan, scientist-in-charge of the Long Valley Observatory for the United States Geological Survey, which looks at volcanoes in the northern Owens Valley-Mono Basin region.