A major earthquake gave California a tsunami scare on Thursday. Aftershocks are ongoing, and they could get big.

A series of moderate earthquakes rattled the waters off Northern California and southern Oregon early Thursday near the Mendocino Triple Junction.

Earthquakes that shake the ground under Redding are a sign of something bigger happening deep below the far Northern California region, geologists say. The culprit is also responsible for much of what ...

Add Yahoo as a preferred source to see more of our stories on Google. Earthquakes that shake the ground under Redding are a sign of something bigger happening deep below the far Northern California ...