{"id":160555,"date":"2026-02-02T18:15:35","date_gmt":"2026-02-02T18:15:35","guid":{"rendered":"https:\/\/www.newsbeep.com\/us-ca\/160555\/"},"modified":"2026-02-02T18:15:35","modified_gmt":"2026-02-02T18:15:35","slug":"cluster-of-quakes-felt-around-san-francisco-bay-including-an-m4-2","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us-ca\/160555\/","title":{"rendered":"Cluster of Quakes Felt Around San Francisco Bay, Including An M4.2"},"content":{"rendered":"

A cluster of earthquakes in the San Francisco Bay Area early Monday including a magnitude 4.2 temblor was felt by thousands.<\/p>\n

The United States Geological Survey reported more than two dozen different quakes. The largest was a M4.2 east of San Ramon at a depth of 5.8 miles on the Calaveras Fault, a right-lateral, strike-slip fault<\/p>\n

There were no immediate reports of damage or injuries.<\/p>\n

Operators of the area\u2019s rail line, BART, issued an alert advising passengers that trains were running at reduced speeds as crews undertook track safety inspections as a result of the quake, the San Francisco Chronicle reported<\/a>.<\/p>\n

\"\"<\/a>A San Francisco earthquake cluster on Feb. 2, 2026. Source: USGS.<\/p>\n

The USGS told ABC7 Eyewitness News in an interview<\/a> the cluster is a continuation of the swarm of quakes the area has been experiencing. The area had its first earthquake in weeks on Friday, however there have been dozens of quakes since November.<\/p>\n

The southern half of the central segment of the Calaveras Fault has historically been the most seismically active segment<\/a> of the fault. It produced the M6.2 Morgan Hill earthquake in 1984 and a M6.2 earthquake in 1911, according to the USGS.<\/p>\n

A working group in 2003 assigned an 11% probability that the Calaveras Fault would produce a magnitude 6.7 or larger earthquake in the next 30 years.<\/p>\n

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