18 August 2010, 02:46 AM ET
The deadly tsunami that washed over the southwest Pacific islands of Samoa and Tonga last September may have been triggered by not just one but two giant earthquakes
17 August 2010, 09:14 AM ET
Potentially active faults complicate the seismic map.
06 August 2010, 03:40 PM ET
The rapid geological, weather and heavenly forces that shape the planet's surface.
06 August 2010, 09:07 AM ET
Geology behind huge fold in Earth's crust pinned down.
04 August 2010, 07:12 AM ET
Shift could explain recent seismic discoveries.
29 July 2010, 08:25 AM ET
The temblor also moved cities and sank inland areas.
28 July 2010, 09:02 AM ET
Earth snapped like a twig — after 16,000 years of bending.
16 July 2010, 06:10 AM ET
The mild earthquake that rattled Washington, DC and surrounding areas early this morning had a magnitude of 3.6.
14 July 2010, 07:07 AM ET
Rumblings not linked to volcanoes.
08 July 2010, 05:58 AM ET
Earthquakes don't necessarily come on a neat schedule that follows the annual calendar.
28 June 2010, 07:35 AM ET
Find out which countries experienced the worst natural disasters in 2009.
25 June 2010, 11:46 AM ET
Faults can fall in synch, causing earthquakes to trigger other temblors.
23 June 2010, 09:48 AM ET
A geology scientist seeks to understand how faults slip and the landscape is sculpted.
24 May 2010, 08:21 AM ET
There's more than a one-in-three chance that a titanic temblor will happen within the next 50 years in the Pacific Northwest.
19 May 2010, 07:14 AM ET
The earth's mantle moves faster than sinking tectonic plates.
05 May 2010, 10:42 AM ET
Andrew Freed recently returned from Haiti, where he has been studying the stresses in Earth's crust before, during and after the earthquake.
28 April 2010, 09:23 AM ET
For tiny Devils Hole pupfish, startling video shows it must have felt like a "huge tsunami" when violent water-level oscillations from an earthquake 300 miles away disturbed the small ledge they live on.
14 April 2010, 08:18 AM ET
With the China earthquake today following several others in this year alone, some might wonder if Earth is shaking more.
14 April 2010, 05:06 AM ET
The earthquake that struck western China occurred in the middle of a plate within the Tibetan Plateau.
05 April 2010, 08:02 AM ET
The earthquake that struck south of the Mexico-U.S. border could mean better social and scientific ties, says one earthquake scientist.
05 April 2010, 05:05 AM ET
The earthquakes in Mexico and Chile are insignificant compared to the Earth's major forces.
02 April 2010, 03:56 AM ET
Icequakes shake glaciers in Alaska every day, sending out seismic waves similar to earthquakes.
26 March 2010, 06:24 AM ET
Geoscientists Chris Marone and Cristiano Collettini travelled to the Isle of Elba to sample a tectonic fault that breaks most of the rules of fault mechanics. Their work reveals why these faults slip.
23 March 2010, 05:46 AM ET
A laptop and PC-based network of seismic monitors are providing earthquake data to researchers and could become an early warning system if enough volunteers sign on.
11 March 2010, 12:09 PM ET
Just a few months into 2010, and Mother Nature has delivered a slew of costly and deadly natural disasters.
11 March 2010, 07:32 AM ET
Scientists who weren't in Chile during this morning's aftershocks nevertheless knew the moment the rumbling started, thanks to a global network of quake-detecting instruments called seismographs.
11 March 2010, 05:48 AM ET
The 7.2-magnitude aftershock that struck Chile isn't unusually following such a massive original earthquake.
03 March 2010, 06:09 AM ET
Reports of looting after the Chile earthquake might make it seem as though people are more selfish after a natural disaster. But experts say this is not this case.
02 March 2010, 11:06 AM ET
With the earthquake in Chile and other large quakes, you might be wondering where next.
02 March 2010, 04:57 AM ET
A map of Chile's coast shows an underwater trench where the Feb. 27 earthquake occurred.
27 February 2010, 07:35 AM ET
The Chilean earthquake is not outside the realm of normal, even though it comes on the heels of other major earthquakes.
27 February 2010, 04:46 AM ET
A tsunami warning has been issued for Hawaii by the Pacific Tsunami Warning Center.
29 January 2010, 08:03 AM ET
A 'tectonic weapon' under testing by the United States caused the Haiti earthquake, according to Venezuelan leader Hugo Chavez.
20 January 2010, 04:35 AM ET
The 6.1-magnitude earthquake that hit Haiti this morning was indeed a strong aftershock.
15 January 2010, 09:38 AM ET
Major earthquake in the United States could devastate cities in California, the Pacific Northwest, and the East Coast.
13 January 2010, 07:47 AM ET
Haiti earthquake caused by sliding of Earth's plates.