A magnitude 6.7 earthquake hit the region most affected by the March 11 magnitude 9.0 quake and tsunami.
The plume that fuels Yellowstone's famous geysers and hot springs appears to be larger than once thought.
Although they're unlikely to trigger quake in distant regions, massive quakes can trigger more seismic activity along the same fault.
This icon of the Mojave desert could be yet another victim of climate change.
The 'maximal perigee' tonight has only a minimal effect on seismic activity and cannot be linked with last week's earthquakes in Japan.
Mother Nature tweaked time by speeding up Earth's spin a bit in response to the killer earthquake.
The operator of an earthquake-hit Japanese nuclear plant said Sunday that the cooling system of another reactor was not working and risked a possible explosion.
The disaster has claimed hundreds of lives and the extent of the damage has yet to be fully assessed.
Don't trust your compass. Magnetic north isn't where it used to be.
Police report multiple fatalities in a city still recovering from a 7.0 magnitude earthquake in Sept. 2010.