WESTWOOD, Calif. -

A magnitude-4.2 earthquake struck near Westwood Sunday, but there were no immediate reports of damage or injuries, authorities said.

The quake, which hit at 7:36 p.m.  was centered three miles west-northwest of Westwood, according to the U.S. Geological Survey.

Firefighters were conducting a damage survey of the department's 470-square-mile jurisdiction, Los Angeles Fire Department spokesman Erik Scott said.

An officer at the Los Angeles Police Department's West Los Angeles Station near Santa Monica Boulevard, west of Sawtelle said he felt the temblor, but he had not heard reports of damage or injuries.

A watch commander at the Santa Monica Police Department said there were no reports of damage or injuries in the city. He said the quake caused a small amount of shaking at police headquarters in the 300 block of Olympic Drive between Fourth and Main streets.

The earthquake, initially measured at magnitude 3.7 before being upgraded to 3.8 and then to a 4.2, was felt at City News Service's office near Olympic and Sawtelle boulevards.

A second temblor with a preliminary magnitude of 1.8 happened about 6 miles north-northwest of Santa Monica at 7:45 p.m., according to the USGS.