Add Yahoo as a preferred source to see more of our stories on Google. Earth's crust is the planet's outermost layer. It is made of solid rock and sits on top of another layer, called the mantle. The ...

(CNN) — California Gov. Gavin Newsom declared a state of emergency Tuesday in the city of Rancho Palos Verdes as severe land shift in the area is threatening the community and disrupting power lines.

Handful of lava pebbles thrown into the air. A new study shows how strong shaking at a fault has rocks—briefly—defying gravity. When Julian Lozos, a seismologist at California State University, ...