An earthquake swarm as rocked Central California for the third straight day, adding to the fears that the fabled 'Big One' could be edging closer to ravaging the state.

Three minor earthquakes were detected less than 30 miles south of San Jose Friday morning, striking within three minutes of each other between 10.40 and 10.43am ET.

The US Geological Survey (USGS) reported that the first tremor registered as a magnitude 3.4 earthquake, and was then followed moments later by magnitude 2.6 and 2.5 quakes.

No injuries or damage to local property has been reported at this time.

Quakes between 2.5 and 5.4 in magnitude are often felt for several miles in all directions but typically cause only minor damage, such as knocking objects off shelves.

However, Friday's swarm struck just a day after at least 13 tremors, ranging from magnitude 1.0 to 3.7, were reported near The Geysers geothermal field in Northern California.

Moreover, another swarm of three more powerful earthquakes struck in nearly the exact same location south of San Jose on Wednesday.

This fresh outbreak of seismic activity has been taking place along a network of fault lines in California which all connect to the infamous San Andreas Fault, the source of the devastating 1906 San Francisco earthquake that's feared to erupt again soon.

Friday's 3.4 magnitude quake was largely felt by residents around the epicenter, in Salinas, Monterey, Hollister, and San Juan Bautista. However, USGS did receive a report of shaking making it all the way to San Francisco, over 50 miles away.

This morning's swarm near the small city of San Juan Bautista was the second to hit the area in the last 24 hours.

A group of three earthquakes was reported by USGS, including a magnitude 4.0 seismic event, between 3pm and 4pm on Thanksgiving.

All six earthquakes detected in this area near the Central California Coast were centered on or close to the Calaveras Fault, a major branch of the San Andreas.

Although the San Andreas is an 800-mile plate boundary responsible for much of the state's seismic activity, it doesn’t work alone.

The San Andreas is connected to a whole family of parallel and branching faults, including the Calaveras, which takes some of its plate motion and spreads the earthquake risk across the entire region.

In Northern California, Thursday's earthquake swarms near The Geysers broke out along a network of faults, including the Bartlett Springs Fault Zone and the Healdsburg–Maacama Fault system.

Both of these faults branch out from the San Andreas, which runs straight through the San Francisco Bay Area and into the Pacific Ocean.

The most recent predictions from USGS looked at a magnitude 7.8 earthquake along the San Andreas Fault originating right in Los Angeles, a city of 3.8 million people.

This hypothetical 'Big One' would cause roughly 1,800 deaths, 50,000 injuries, and $200 billion in damages, according to the Great California ShakeOut.

However, studies have warned that major earthquakes along significant fault lines rarely look exactly the same as previous events.

So, the next 'Big One' similar to the devastating quake in 1906 could potentially strike anywhere along this plate boundary, from South California, to the Central Coast where Friday's swarm was detected, to areas north of San Francisco.

The newest outbreak of small earthquakes is no guarantee that the Big One is nearing, however, as experts believe they know what's causing them.

So far, well over 100 small earthquakes have shaken the Bay Area this month, prompting scientists to dig into what's driving the unusual outburst.

Sarah Minson, a research geophysicist at USGS's Earthquake Science Center at California's Moffett Field, recently told SFGATE: 'This has happened many times before here in the past, and there were no big earthquakes that followed.'

'We think that this place keeps having earthquake swarms due to a lot of fluid-filled cracks, thanks to very complex fault geometry, unlike, say, the San Andreas Fault, which is this nice clean edge.'

However, Minson has also warned that the chances of a historically large quake striking the San Francisco Bay Area within the next 30 years have risen to a staggering 72 percent.