A minor, 3.9-magnitude earthquake struck in the San Francisco Bay Area ... severity map. An aftershock is usually a smaller earthquake that follows a larger one in the same general area.

LIVE UPDATES: The aftermath in Northern California after 7.0 quake Amy Palmer is referring to the Tsunami Warning that was issued Thursday in the Bay Area, and along the West Coast after a 7.0 ...

Hours later, a second 6.1 magnitude quake hit in the same area. The Pacific Tsunami Warning Center in Hawaii issued an alert following the first quake saying hazardous waves could be possible but ...

The most recent risk assessment, outlined in maps published by the California Geological Survey, illustrate the devastation possible from extreme-but-realistic scenarios.

A magnitude 3.9 earthquake gave the San Francisco Bay Area a short jolt on Monday night ... According to the USGS's epicenter map, shaking was felt as far north as the border of Solano and ...

Off the coast of Hawke’s Bay, a giant slumbers – but could wake at any time. The Hikurangi Subduction Zone is where the Pacific plate drops westward under the Australian plate. It sits just off the ...