A small earthquake rattled the Los Angeles area early this morning.

The magnitude-3.3 quake struck around 1:53 a.m. Friday and was centered about 4 miles north-northwest of Fontana and 44 miles east of the Los Angeles Civic Center, according to a preliminary report by the U.S. Geological Survey.

The survey says the earthquake's epicenter was relatively shallow, just one-tenth of a mile below the surface.

There were no immediate reports of damage or injury.

The temblor follows a series of quakes that struck minutes apart in Mexico's Gulf of California earlier this week.

The four shakers registered magnitudes ranging from 5.8 to 6.9.

They were all centered in the middle of the narrow slice of sea between the Baja peninsula and Mexico's mainland, where the Pacific and North American plates are pulling apart.