Fault lines are fractures or breaks in the Earth's crust where tectonic plates move past each other, often resulting in earthquakes. These geological features are classified into three main types ...

Below these depths, rocks are probably too warm for faults to generate enough friction to create earthquakes, van der Elst said. For nearly a century, scientists have been aware of a 4.47 mile ...

SAN FRANCISCO (CBS SF) -- Four areas of the San Andreas fault system in the San Francisco Bay Area have accumulated enough energy to produce major earthquakes, a new study finds. The study ...