A short, sharp earthquake sent coffee sloshing out of breakfast cups Sunday morning but early reports appeared to show little damage.
The quake, with a preliminary magnitude of 3.9, was centered about four miles east of Newhall.
It shook residents out of their weekend slumber in the San Fernando Valley, Pacific Pallisades and other areas.
Several aftershocks followed the initial temblor, but they were all considerably smaller. The largest, at about 9:30 a.m. had a magnitude of 2.5.
The Los Angeles Fire Department said it would use the Twitter hashtag #LAQuake to provide information throughout the day.
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