Update 1:23 p.m.:
The U.S. Geological Survey has upgraded Monday's earthquake from 3.2 to 3.3, according to the Los Angeles Times.
The USGS "Do You Feel It" site said the quake was most strongly felt on the Westside but also in the South Bay, downtown L.A. area and the San Fernando Valley.
To read the Times report in full, click here.
Update 4:53 a.m.:
The Beverly Hills Police Department said there have been no reports of damage in the city after Monday's magnitude-3.2 earthquake, but that some 50 alarm calls had come in.
"It's a combination of automobiles, businesses and residences," Beverly Hills police Sgt. Michael Publiker said. "We have been inundated by alarm calls."
Publiker said that the shaking from an earthquake triggers the motion detectors in alarms. When an alarm goes off, a security company notifies the police.
"If we receive a call from an alarm company, we dispatch," Publiker said.
Update 4:22 a.m.:
A magnitude-3.2 earthquake centered in Beverly Hills shook much of Los Angeles' Westside early Monday, according to the U.S. Geological Survey.
Beverly Hills is located on the West Beverly Hills Lineament fault, an extension of the Newport-Inglewood Fault System.
Described as a sharp jolt, the quake hit just before 3:27 a.m. and was felt from Marina del Rey to Hollywood.
Caltech seismologist Lucy Jones told KNX radio the quake was shallow, on a fault near the surface, and that quakes close to the surface are typically widely felt.
Jessica Turner of the USGS in Golden, Colo., told KNX radio that the quake was part of Southern California's "normal seismicisty" and that aftershocks should be expected.
The quake was in a range that does not generally cause structural damage. Los Angeles firefighters at 106 stations across the city were checking their areas for damage. No problems had been immediately reported.
At 4:09 a.m. Los Angeles Fire Department Spokesman Brian Humphrey issued a statement saying the LAFD had concluded its "Earthquake Emergency Mode" citywide ground and air survey.
"There is no significant damage, injury or loss of life in the City of Los Angeles we can attribute to the 3:26AM PRELIM M3.3 #earthquake near Beverly Hills," Humphrey stated. "The department is now in a normal operating mode."
The quake woke up people all across Los Angeles. Here are just some of the tweets that came through in the minutes following the shaking:
@MrLevine: Earthquake in Culver City just woke me. Thought my wife was kicking off the sheets.
@DanaWickens: @innoutburger shuld open post-late night earthquakes cause people need animal style anything to calm terror/nerves. #EARTHQUAKE.
@Rokeemax: That #earthquake was intense... Hard to get back to sleep after that one.
@akafotoboy: Why is it whenever there's an #earthquake here in LA, My first thought is that it was some huge monster loose in my city.
@DwightHoward: Just experienced an la earthquake wowwwww
@ArianaGrande Oh my god did everybody in LA just feel that???? The most intense earthquake just happened... My heart is beating so fast. Everyone alright?
Even celebrities took to their twitter feeds to share their experiences:
Will.i.am @iamwill: There was a #Earthquake in l.a just 1min ago...If is wasn't...it was the beat I'm making in the studio for @NicoleScherzy...#califault.
@ApoloOhno: Either that was a crazy dream or did I just feel an earthquake in LA.... #woah
@ParisJackson: yup .. i toootally got up screaming and ran to blanket's room because of the earthquake… yeah a ten year old is gonna protect me!! hahaha
Did you feel the Labor Day quake? Take our poll and tell us where you felt the jolt in the comments section below.
- Information from City News Service contributed to this report.