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A 4.0 magnitude earthquake struck just north of the 105 Freeway on the edge of the South Bay region of Los Angeles County early Monday morning, according to the U.S. Geological Survey.

The temblor hit at 4:44 a.m. about 1 mile east-northeast of Lennox and 2 miles southeast of Inglewood.

The epicenter was located just south of West Century Boulevard near Hollywood Park Casino. The preliminary depth of the quake was 11.8 miles, USGS said.

The temblor struck with a preliminary magnitude of 4.1 but was later downgraded to 4.0 by the USGS.

There were no immediate reports of injury or damage, Los Angeles Mayor Eric Garcetti tweeted.

The quake was felt as far away as Lancaster, Laguna Niguel, Rancho Cucamonga and Ventura, according to the USGS.

Dr. Lucy Jones said the temblor struck very deep and was probably not on any mapped fault line.

The 4.0 was preceded by a pair of smaller quakes, registering 3.3 and 2.5, about 30 minutes earlier.

More than 70 small aftershocks followed, clustered just east of the Los Angeles International Airport. None were larger than magnitude 2.5 as of 6 p.m.