The violent earthquake that struck western India yesterday was born from ponderous but powerful forces deep underground that move entire continents. In many ways, the quake was similar to the deadly ...

Countless seismic faults just as dangerous as the one that triggered Monday's San Simeon earthquake are suspected to be lurking throughout the Bay Area. Scientists have known about some of these ...

Over recent geologic time, as the lunar interior cooled and contracted the entire moon shrank by about 100 m. As a result, its brittle crust ruptured and thrust faults (compression) formed distinctive ...