A 3.4 magnitude earthquake hit San Martin, CA, on Friday, felt in various towns without injuries or damage. A 2.0 magnitude quake followed ten minutes later, both linked to the Calaveras Fault, which has an 11% risk of larger earthquakes in the next 30 years.

On Friday afternoon, a magnitude 3.4 earthquake occurred near San Martin, California, at 12:35 p.m., as reported by the U.S. Geological Survey. The epicenter was located 8 miles north of Gilroy and 6 miles south of Morgan Hill, with tremors felt in these towns and areas as far as Redwood City, Aptos, Capitola, Santa Cruz, and Santa Clara. Additionally, a secondary quake of magnitude 2.0 was recorded just ten minutes later in the same vicinity. Fortunately, no injuries or damages have been reported; both earthquakes were associated with the Calaveras Fault. The 2003 Working Group for California Earthquake Probability estimated an 11% likelihood of a significant earthquake of magnitude 6.7 or more originating from the Calaveras Fault within the next three decades.

Earthquakes are geological phenomena caused by the sudden release of energy in the Earth’s crust, resulting in seismic waves. The Calaveras Fault, a known fault line in California, has a history of seismic activity. Understanding the patterns of earthquakes along this fault is critical for assessing risks and preparing for future seismic events. The USGS continuously monitors seismic activity to provide updates and public safety information. The reports enable communities to stay informed and responsive to earthquakes as they occur.

In summary, a magnitude 3.4 earthquake struck near San Martin, California, on Friday, followed closely by a smaller quake. These events were felt across multiple towns, with no reported damages or injuries. As part of the broader geological context of the Calaveras Fault, the potential for future seismic activity remains a concern, warranting ongoing monitoring and preparedness efforts among residents in the region.

Original Source: patch.com