The Concord Fault is a geologic fault in the San Francisco Bay Area . The reason it is called that is because it is located under the city of Concord . It is connected to, and considered to be part of, the same fault zone as the Green Valley fault, which lies just a few miles to the north across the Suisun Bay . The fault is situated at the east of West Napa Fault and extends from Mount Diablo to the Carquinez Strait , an approximately 11 mile long distance. Like most other faults in this area, the Concord Fault is a strike-slip fault, moving approximately 2.7 to 3.6 millimeters a year.
3-420: Currently, it is considered to be under a high stress level and therefore has a higher chance of a major earthquake happening. There have been earthquakes on this fault before. On October 23, 1955, a 5.4 magnitude quake caused about 1 million dollars in damage (about 8.7 million today) and one death. The last large earthquake linked to this fault occurred over 400 years ago. According to USGS seismologists it
6-489: Is "the most urban fault" in the East Bay , with potential for a larger event than the 2014 South Napa earthquake . As critical infrastructure, including refineries that process a significant portion of the state's total crude oil , and a railroad bridge, lie under it, a major earthquake from it could leave the entire northern half of the state without fuel and disrupt transmission of electricity and water to some extent across
9-573: The state. One particular pumping station, if hit by a quake, would particularly damage transmission of fuel. A major earthquake there could also cause flooding, which would impact drinking quality, and a loss of electricity. This article about a specific stratigraphic formation in California is a stub . You can help Misplaced Pages by expanding it . This tectonics article is a stub . You can help Misplaced Pages by expanding it . Earthquakes Too Many Requests If you report this error to
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