At the Seismological Society of America's Annual Meeting, researchers posed a seemingly simple question: how wide are faults?

Scientists found new evidence that Earth’s crust is peeling underneath the Sierra Nevada in California. The process might be ...

Sediment cores drawn from four lakes in Guatemala record the distinct direction that ground shaking traveled during a 1976 ...

Puerto Rico's hurricane-battered power grid has suffered compounding crises including hurricanes and financial problems.