A USGS map shows the most recent earthquakes registered in California. (courtesy USGS)

LOS ANGELES (CBS)— Did you feel that?

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Over fifty earthquakes have rattled the state of California over the last 14 hours as of Friday morning, including a 3.2-magnitude earthquake that struck 21 miles outside Moreno Valley in Riverside County at 5:03 a.m., according to the U.S. Geological Survey.

The majority of the tremors have ranged between 2-4 magnitude and have been felt as far north as San Carlos, about 10 miles south of San Francisco, and as far south as Holtville near the U.S – Mexico border.

In addition to the greater Los Angeles, San Diego, and San Francisco areas, quakes as big as over 4.0-magnitude have been recorded in Baja California within the 14 hours, according the USGS website.

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The most recent one registered as a 4.1-magnitude on Friday morning at about 3:37 a.m. PDT, about 20 miles south of Guadalupe Victoria, Mexico.

Earthquake swarms are defined as when a local area experiences multiple earthquakes over a short period of time. The USGS notes that swarms can last as short as a day or as long as several months.

Of course, earthquakes — even clusters of them — are not unusual for the seismically-active state, but the swarm does end a period of relative quiet for the region.

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The U.S. government recently warned that a major earthquake could disrupt the local labor market and cost Los Angeles as much as $213 billion in losses.