Add Yahoo as a preferred source to see more of our stories on Google. Tiny quakes help scientists map hidden faults where the San Andreas meets Cascadia, reshaping quake hazard estimates. (CREDIT: ...

Make no mistake—this doesn’t mean there is no danger. The researchers urge policymakers to treat seismic risk as a constant.

SALEM, Ore. — Oregon has a new playbook for preparing and responding to a major earthquake that dictates what should be tackled over time versus a list of tasks to get done. The playbook provides a ...

The next major Pacific Northwest earthquake could cause coastal land to sink by up to 6.5 feet in a matter of minutes, a new study has warned. A magnitude 8.0 tremor on the Cascadia subduction zone ...

Twenty-five years ago this month, the magnitude 6.8 Nisqually earthquake hit the Puget Sound area, rocking the ground for 40 seconds or more and causing several billion dollars in damage. As ...

Far below the Pacific, scientists are mapping a hidden record of catastrophe carved into the seabed by ancient Cascadia earthquakes. Those deep scars, preserved in massive underwater landslides, are ...

Northern California’s coast keeps you on alert, even on quiet days. Offshore, three tectonic plates meet near Humboldt County at the Mendocino Triple Junction. It is where the San Andreas fault system ...