A massive 8.3-magnitude earthquake struck off the central coast of Chile on Wednesday, sparking warnings that tsunami waves could reach as far as Japan.
High-tech instruments and old-fashioned groundwork remain important in the aftermath of an earthquake.
Report's maps show geologists' predictions of where and how often future earthquakes may occur and how strongly they may shake the ground.
New study challenges the idea that the rate of plate movement remains stable.
Four-billion-year-old sample suggests modern-day Iceland is our best bet for an example of how Earth's continents first formed.
New work shows how the highest mountain range in the world is not so much a tectonic train wreck as a shuffled pile of crumbly crustal dominoes.