A deep earthquake in Chile surprised scientists by using heat to grow stronger far underground and cause serious surface ...

— James Webb, Mineral Point, Wis. A Chuck DeMets, professor of geophysics at the University of Wisconsin-Madison: Most earthquakes occur when a geological fault, a fracture within the Earth’s crust, ...

Tiny tremors and temblors recently discovered in fault zones from California to Japan are generated by slow-moving earthquakes that may foreshadow catastrophic seismic events, according to scientists ...