Seismic waves generated by natural or artificial sources traverse Earth’s interior, their speeds and paths controlled by variations in elastic properties, density and temperature. Compressional (P) ...

On a sunny morning in September 1985, a massive earthquake killed more than 9,000 people in Mexico City, even though the epicenter of the earthquake was some 200 miles away. The worst damage happened ...

Mantle plumes beneath volcanic hotspots, like Hawaii, Iceland, and the Galapagos, seem to be anchored into a large structure within the core-mantle boundary (CMB). A new study, published in Science ...

Digital disaster training: A new simulation and video game re-creates the 2025 Tracy Arm megatsunami, allowing users to experience its scale and learn safety responses. Historic wave height: The ...

The Hayward fault, part of the larger San Andreas fault system, runs 74 miles through the East Bay of the San Francisco Bay Area. The fault is overdue for an earthquake that could cause extensive ...