Authorities have evacuated families, hotel guests and tourists from Grindavík, the nearby Blue Lagoon resort, and other surrounding areas as a precaution

The concept isn’t hypothetical. Tephra layers in Icelandic peat cores show that eruptions soared six-fold between 12,000 and 10,000 years ago —exactly when

Thousands of years ago, thick glaciers covered southern Chile, pressing down on the land and holding back the volcanoes underneath. The ice acted like a cap, trapping magma below the surface. But over time,