A third earthquake struck California in less than six hours, this one rocking the city of Hayward near San Francisco and San ...

California is riddled with a number of fault lines that frequently cause earthquakes, including Arrowhead, Waterman Canyon, ...

G eologists are closely monitoring Mount Spurr in the Aleutian Arc of Alaska, USA, after continued volcanic unrest. The Alaska Volcano Observatory (AVO) monitoring the situation says that an eruption ...