Helens (1980), and Mount Pinatubo (1991) were enormous, they are very small compared to ancient eruptions such as Wah Wah Springs, Toba, Yellowstone, or Long Valley Caldera.Earth's Magnetic North Pole Is Shifting Toward Siberia. What Is This Unusual Movement?SmithsonianMap of observed and ...
'It's a shock,' CAL FIRE chief on deadly L.A. fires Scientists discover where the Yellowstone supervolcano will erupt next 1:21 3 Calgary skating trails that take outdoor fun to another level Thousands of flights cancelled as biggest snowfall in years hits southern U.S. 1:49 Why warm ch...