A full fault rupture, estimated to be around a 7.5 magnitude, could kill between 3,000 and 18,000 people, according to US Geological Survey and Southern California Earthquake Center.

An earthquake has struck California's Bay Area right along a fault line experts now fear may be the surprise cause of the long-awaited 'Big One.'. The US Geological Survey (USGS) said the 3.2 ...

A group of fault lines sit underground near Van Horn, Texas, dating up to 1.6 million years old, according to a map published by the USGS.