Earthquake Hits California, Nevada As Reno Rattled by 4.7 Magnitude Quake

California and Nevada were rocked by a 4.7 magnitude earthquake felt in Reno and Sacramento on Thursday night, officials have reported.

The United States Geological Survey said the quake's epicenter was about 11 miles northwest of Truckee, California. People in the nearby Nevada cities of Reno and Carson City have reported moderate and light tremors, according to a USGS map.

Sacramento residents also reported weak tremors from the earthquake, which registered at a depth of 10 kilometers. Some people said they felt minor shakes as far away as the coastal city of San Francisco. At the time of writing, more than 6,800 people have submitted "felt reports" to the USGS.

Sacramento Metro Fire said no damage in the state capital had been flagged as of early Friday morning, according to local station CBS Sacramento.

USGS Map of Truckee Earthquake
A 4.7 magnitude earthquake was recorded 11 miles northwest of Truckee, California, on Thursday night. It was felt as far away as Sacramento, California. UNITED STATES GEOLOGICAL SURVEY

The National Weather Service in Reno tweeted that staff felt the shake in their offices, but so far no damage from the earthquake has been recorded.

A series of smaller quakes were recorded in the northern California area on Thursday. A 2.5 magnitude quake was reported at 2 p.m. UTC around five miles to the southeast of Dollar Point, a community on the shore of Lake Tahoe.

A 2.6 magnitude earthquake was recorded near Willows, California, early on Friday morning, and a fourth earthquake registering at 2.5 magnitude was recorded west of Cobb in Lake County, according to the USGS.

The organization ranked the 4.7 magnitude earthquake with a green alert, meaning it is unlikely to have caused significant casualties or economic damage in the surrounding towns and cities.

Magnitude indicates the size of an earthquake and is detected with a seismometer. It is measured with Moment Magnitude, which takes into account the area of a fault slip and the strength of the rock along the fault, as well as other factors.

The size of the rock along the fault, its material and the area of its movement can all impact the force of an earthquake. The Richter scale measurement is considered to be outdated.

An earthquake magnitude scale stretches from 2.5 to 8 and above. The 4.7 magnitude quake would be considered a light tremor, but was on the cusp of being classified as "moderate." Earthquakes are considered strong at 6.0 magnitude and above.

Posting on social media, the USGS said the California tremors were the result of a "notable quake."

05/07/21 04:25 a.m. ET: This article has been updated to include a photo of the quake zone from USGS and to add extra information.