A volcano in Death Valley is now considered potentially active after a study revealed that it last errupted less than 1,000 years ago. Scientists from Columbia University last week published a study on the Ubehebe Crater that shows the volcano last erupted 800 years ago, not several thousand years ago as previously believed. Scientists also believe that conditions in Death Valley 800 years ago and today are similar, suggesting that the volcano could erupt again. They also believe that there is enough water under the crater to produce steam and an explosion. Seismic activity in the lead up to an eruption would likely offer enough time to issue a warning.
Read more at National Geographic