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Magnitude 5.1 earthquake shakes Southern California

Deadly floodwaters have inundated streets along the length of Mexico’s arid Baja California, where Tropical Storm Hilary came ashore Sunday, carrying torrential rain into Southern California and beyond. The National Hurricane Center predicts Hilary will unleash flooding across a normally dry region, swirling north into Nevada by Monday morning. For now Tijuana and San Diego are directly in the storm’s path. Hurricane Center Director Michael Brennan says it's about the water, not the wind, and people should focus on avoiding flood risks.

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By: CNN Wire

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As Southern California braced for a highly unusual summer storm Sunday afternoon, residents were struck by a much more familiar phenomenon: a magnitude 5.1 earthquake, according to the US Geological Survey.

The epicenter of the quake was in Ojai, between Santa Barbara and Ventura, and it occurred along the Sisar fault, USGS data showed.

There were no immediate reports of damage, the Ventura County Sheriff said in a social media post.

Shaking was felt throughout Los Angeles and surrounding communities, according to a USGS tool that allows residents to self-report their experience. About 50 miles away in Valencia, the quake felt like a slow roll, lasting about 20 seconds. Residents reported a slow-rolling effect in the Hollywood area, as well.

At least two aftershocks — measuring 3.1 and 3.6 — followed the initial quake.

Earthquake expert Dr. Lucy Jones said it appears to have been preceded by a small foreshock sequence that began Saturday morning.

USGS seismic reports are preliminary and are sometimes adjusted.