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A magnitude 3.4 earthquake jolted the South Bay early Wednesday, according to the United States Geological Survey.
The quake hit at 2:15 AM local time at a depth of roughly 5 miles. The epicenter was about five miles east-northeast of Alum Rock and nine miles east-northeast of San Jose and felt as far north as Vallejo and as far south as Salinas.
There was no initial word on damage or injury resulting from the quake.
The quake occurred on the Calaveras Fault, a major branch of the San Andreas Fault System. The most recent moderate quake on the fault was a magnitude 5.6 near Alum Rock on October 30, 2007. A magnitude 6.2 earthquake struck near Morgan Hill in 1984.
More information on this earthquake is available on the USGS event page.
Amy Graff is a digital editor for SFGATE. Email her at email@example.com.
This post was originally posted at https://www.sfgate.com/bayarea/article/Magnitude-3-4-earthquake-jSan-Jose-Alum-Rock-14503452.php.