The answer lies in the depth of the recent earthquake.

Gravity may seem constant, but it actually varies across the planet—and one of the strangest places is Antarctica, where ...

The U.S. Geological Survey has kicked its Volcano Observatory Notices to Aviation into a new, aviation ready format that lets flight planning systems digest alerts about volcanic plumes and ash more ...

A continental collision trapped oil within what is today Iran. The same collision explains why that oil is trapped behind the Strait of Hormuz now ...

Louisiana woke up to a jolt Thursday that seismologists say was unusually strong for a state better known for hurricanes than quakes. A magnitude 4.9 earthquake hit just north of Coushatta in ...

A 4.9-magnitude earthquake jostled hundreds of thousands of people in Louisiana early Thursday morning — an unusually strong temblor for the state. There have been no reports of damage or injuries.

Much of our understanding of Earth's past is derived from stratigraphic records exposed in rock outcrops or recovered from drilled cores. These records span immense time intervals, from thousands to ...

The Echinus Geyser is a hot spring located in Norris Geyser Basin at Yellowstone National Park, measuring around 660 feet ...

Experts say a series of tremors around Kerikeri this week are a reminder that nowhere in New Zealand - even the country's most seismically stable region - is immune from earthquakes. Five quakes were ...

A group of specialists briefly stopped by Sitka to attend to much-needed maintenance of tectonic shift-tracking equipment.