TONOPAH, Nev. (KGO) -- A 6.5 magnitude earthquake in western Nevada has been felt across parts of the Bay Area.
The U.S. Geological Survey said the earthquake struck around 4:03 a.m. about 35 miles outside Tonopah, east of the Sierra Nevada range and roughly three hours from Las Vegas.
The USGS also reported several aftershocks in the western Nevada area, including a 5.1 temblor and several others measuring between 4.0 and 5.0.
The quake struck with 30 million pounds of explosive energy at a depth of about 4.7 miles in an area of hard earth -- which created conditions for it to be felt hundreds of miles away in the Bay Area. Temblors of this strength only happen about 120 times a year.
People in California and Salt Lake City, Utah tweeted that they felt the quake.
It's unclear if the quake caused any damage or if anyone was injured.
Go here for the latest news, stories, and videos about earthquakes.