Some people in the Long Beach area—as far north as Paramount and as far east as Marine Stadium—reported they felt some weak shaking.

Experts speculate that the jolt felt around 8:22 a.m. was a possible sonic boom.

The temblor was felt in the Long Beach, Boyle Heights, East Los Angeles and Commerce areas, but there were no reports of injuries or damage.

Municipalities across the state, including Long Beach, are participating in the Great ShakeOut. The earthquake drill is scheduled for 10:21 a.m.

The quake was initially registered at 4.6 on the Richter scale and later reported as magnitude 4.2. According to Cal Tech, the epicenter is just north of the one that caused the 1933 Long Beach quake.

According the United Stated Geological Survey, the 3.7 quake began at 6:55 p.m.

Three earthquakes shook Southern California within about a half hour this morning centered around the unincorporated Lennox area.

Residents in Long Beach and as far as Catalina Island reported being woken up and their furniture rattling.

The earthquake, centered near the unincorporated View Park-Windsor Hills area, near Inglewood, struck at 12:03 a.m.

The quake was based near Anza, Calif., which is about 90 miles from Long Beach in Riverside County.