The Cascadia Subduction Zone off Oregon and Washington has been accumulating stress for 326 years — within the 200-500-year rupture cycle that produces magnitude 9 earthquakes and mega-tsunamis. USGS ...

Depending on where they hit, the most destructive force of an earthquake may not lie in the destructive shaking on land. Instead, it's often found in the way that it causes the depths of the ocean to ...

In the summer of 2025, a massive 8.8-magnitude earthquake struck off the coast of Russia's Kamchatka Peninsula. While that is not one of the five largest earthquakes ever recorded, that is still ...