NBC Nightly News with Brian Williams
JUST IN: 7.5-magnitude earthquake strikes Guerrero, Mexico, USGS says

JUST IN: 7.5-magnitude earthquake strikes Guerrero, Mexico, USGS says

JUST IN: 5.8-magnitude earthquake strikes off the coast of Panama, USGS says; no early reports of damage or injuries

JUST IN: 5.8-magnitude earthquake strikes off the coast of Panama, USGS says; no early reports of damage or injuries

BREAKING NEWS: 8.0-magnitude earthquake strikes off the northern coast of Chile; tsunami warnings issued

BREAKING NEWS: 8.0-magnitude earthquake strikes off the northern coast of Chile; tsunami warnings issued

4.4-magnitude earthquake strikes Southern California
Details: http://nbcnews.to/Oomlpw

4.4-magnitude earthquake strikes Southern California

Details: http://nbcnews.to/Oomlpw

Numerous aftershocks recorded after powerful 6.9-magnitude earthquake strikes off the coast of Northern California http://nbcnews.to/1kGMjCk

Numerous aftershocks recorded after powerful 6.9-magnitude earthquake strikes off the coast of Northern California http://nbcnews.to/1kGMjCk

JUST IN: 5.0 magnitude earthquake strikes off the northern coast of Cuba 

JUST IN: 5.0 magnitude earthquake strikes off the northern coast of Cuba 

BREAKING NEWS: Magnitude 7.5 earthquake strikes off the coast of Fukushima Prefecture, Japan; Japanese authorities have issued a tsunami advisory for Fukushima Prefecture, expecting a 1-meter (3-foot) tsunami by 1:40pm EDT US time, The Weather Channel reports

BREAKING NEWS: Magnitude 7.5 earthquake strikes off the coast of Fukushima Prefecture, Japan; Japanese authorities have issued a tsunami advisory for Fukushima Prefecture, expecting a 1-meter (3-foot) tsunami by 1:40pm EDT US time, The Weather Channel reports

Just in: 4.6-magnitude earthquake 12 miles west of Santa Barbara, CA 

Just in: 4.6-magnitude earthquake 12 miles west of Santa Barbara, CA 

JUST IN: 4.0-magnitude earthquake near Rancho Palos Verdes, California Details: http://nbcnews.to/10z5TB2

JUST IN: 4.0-magnitude earthquake near Rancho Palos Verdes, California 

Details: http://nbcnews.to/10z5TB2

6.3-magnitude earthquake strikes near Iran’s nuclear power plant Details: http://nbcnews.to/12EVAid

6.3-magnitude earthquake strikes near Iran’s nuclear power plant 

Details: http://nbcnews.to/12EVAid

Just in: USGS reports 7.9 magnitude earthquake off the coast of Costa Rica. Tsunami watch issued for the Caribbean.