A 9.1 magnitude earthquake did more than trigger a deadly tsunami. NASA explains how it affected Earth’s axis and day length.

When a massive 9.1 magnitude earthquake struck off the coast of Sumatra on December 26, 2004, the world witnessed one of the ...

A future Cascadia earthquake could unleash far more than just devastating shaking — it could sink large parts of the Pacific ...

When an earthquake rips along the Cascadia Subduction Zone fault, much of the U.S. West Coast could shake violently for five ...

The next great earthquake isn't the only threat to the Pacific Northwest. A powerful earthquake, combined with rising sea ...