There was an earthquake near San Ramon that registered a 3.8-magnitude. Geologic information is from the Hayward model (Graymer et al . The largest historical quake on the Calaveras Fault was a M6.6 earthquake in 1911. The majority of that percentage lies west, toward San Francisco, where the San Andreas and Rodgers Creek/Hayward fault lines have a 21 percent and 31 percent chance. A walking tour of the Calaveras fault in Hollister, California Introduction. It had initially popped up as a 4.0-magnitude quake along the Calaveras fault. "Calaveras" is also the name of a California county in the foothills of the Sierra Nevada mountains, some 100 miles (160 km) east of Santa Clara County, far from the Calaveras Fault. California. According to the USGS, there are seven 9 of 32 10 of 32 Calaveras Fault (zoomed in on northern section) Cities and towns on or near the fault: Alamo, Danville, San Ramon, Dublin, Pleasanton, Kilkare Woods, Sunol. But as Kaven notes, the history of the Calaveras fault, which runs under San Ramon, does tell us something—and it's actually pretty interesting. . SAN RAMON (CBS SF) — A swarm of earthquakes rumbled under the San Ramon-Danville area Wednesday, measuring as high as 3.9 in magnitude, giving local residents a subtle reminder of the seismic . The Calaveras Fault Zone runs right through the City of San Ramon and could cause severe shaking following a possible 6.9 . The fault cuts through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister. The nearby Calaveras Fault, which extends to Danville and San Ramon, is the next most dangerous one, with a 26 percent chance. The fault connects with the Paicines fault, which trends subparallel ( N42 W) to the creeping San Andreas fault. The San Ramon Valley fill includes Quaternary-aged . The Calaveras fault runs right along the San Ramon Valley. SAN RAMON, Calif. (KGO) -- A preliminary 3.9 magnitude earthquake struck near San Ramon Wednesday, according to the U.S. Geological Survey. Each lasted for weeks or months, but so far none was closely followed by a significant quake. There was an earthquake near San Ramon that registered a 3.8-magnitude. Earthquake swarm KPIX-TV Pleasanton Fault San Francisco San . The largest historical quake on the Calaveras Fault was a M=6.6 event in 1911 (Doser, 2009), but far too little is known about this large event. As the Calaveras Fault trace within San Ramon is well established it was projected that the bulk of the 75" of design fault offset would occur within a relatively short fault zone, approximately 10 feet wide. The Calaveras Fault is a major branch of the San Andreas Fault System that is located in northern California in the San Francisco Bay Area.Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep.The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. Thus, the timing of the most-recent large earthquake on the Northern Calaveras fault remains unknown (Kelson et al., 1996, 1999). The Calaveras fault system stretches 131 km, from south of Hollister, northward, into the Danville-Walnut Creek area (Taylor, 1992). (Here is a regional map courtesy of Xerox PARC.) The epicenter was 1 mile north of San Ramon, 2.7 miles southeast of Danville and 12.4 miles south of Concord, USGS said. Download Download PDF. The Bay Area Area From the USGS website, the earthquake that hit approximately 8:05 PM, 5 miles North North/East of Alum Rock on the Calaveras Fault and was 5.6 on the Richter Scale with after shocks being felt in San Ramon also. Some scientists predict that the Bay Area's the next major quake will occur on this fault. Andria Borba contributed to this report.. The largest in the sequence, a magnitude 3.6 earthquake, came at 12:19 p.m. Friday. More Than A Dozen Small Quakes Rattle San Ramon On Anniversary Of Loma Prieta QuakeThe timing of the quake swarm that continues to rattle the Calaveras Fault in San Ramon coincides one of the most . The Calaveras Fault is the major active fault in the planning area with rupture potential and runs parallel to and just west of San Ramon Road The Pleasanton Fault, near the west edge of Camp . Based on present creep rates, the fault can be divided into two overall segments; that south of the Calaveras Reservoir, and the San Ramon segment (Kelson, et al, 1992), between Sunol and Danville. The largest historical quake on the Calaveras Fault was a M6.6 earthquake in 1911 . . Five notable swarms have occurred near there since 1970, the most . Welcome to the world of earthquake non-prediction. Parks, is difficult to locate precisely . Rather than trying to Some of the cities which the Calaveras Fault passes through or near are: Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister. Oct. 14, 2015. Seismologists at the University of California, Berkeley say . The San Andreas Fault sits at 22 percent, . Greenville has a 3 percent chance, as does the Concord/Green Valley fault. The northern segment of the Calaveras Fault (NCF) runs from Calaveras Reservoir north along the western edge of the Livermore and San Ramon Valleys. The Concord Fault runs through part of Concord and Pacheco, and the Clayton-Marsh Creek-Greenville Fault runs from Clayton at its north end to near Livermore. According to the 1999 study on earthquake probabilities in the San Francisco Bay Area, the Calaveras fault has an 18% probability of a M6.7 or higher earthquake in the next 30 years. The epicenter was a mile from San Ramon. The Calaveras Faulty is second at 26 percent. San Ramon, which has 75,000 residents, sits on the Calaveras Fault running 76 miles (122km) through the San Francisco Bay area, splaying out from the larger San Andreas fault. Some of the cities which the Calaveras Fault passes through or near are: Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister. Generally speaking, there are seven major fault zones in the region: the Calaveras, Concord-Green Valley, Greenville, Hayward, Rodgers Creek, San Andreas and San Gregorio. The beauty of San Ramon was created by nature. The quake occurred on the Calaveras Fault that produced the magnitude 6 . In Spanish, Calaveras means skulls The reservoir is fed mainly by Arroyo Hondo and Calaveras Creek. The Hayward Fault runs from San Pablo Bay to Fremont. Major branch of the San Andreas Fault System that is located in northern California in the San Francisco Bay Area. al., 1996), and earlier works extended it even farther north. One complication: The house was on the Calaveras Fault, a potentially dangerous fracture that runs from just east of Gilroy north through the foothills to just west of Dublin and San Ramon. Share. CVCP - Corey Place, San Ramon - Calaveras fault 1.8 mm/yr since 1980 [0.1 mm/yr 1980-1992; 3.5 mm/yr 1992-2001; 1.2 mm/yr 2001-2006] Northern Calaveras Fault 0 50 100 1980 1984 1988 1992 1996 2000 2004 2008 y = -8430.9 + 4.2212x R= 0.98019 CVWC -Welch Creek Road - Calaveras fault 4.2 mm/yr since 1997 0 50 100 1980 1984 1988 1992 1996 2000 2004 2008 The U.S. Geological Survey says the quake with a preliminary 3.4 magnitude struck along the Calaveras Fault near the East Bay communities of San Ramon and Danville around 9:30 a.m. today. Accordingly, how long is the Calaveras Fault? Tracking the Elusive Calavaras Fault from Sunol to San Ramon - J. David Rogers. This Paper. Nevertheless, given its structural position, In the San Ramon area, the fault is typified and Geologic Investigation, Castleridge Development, Foothill Road, Pleasanton, the western terminus of Alcosta Boulevard, as Harding (1973) originally suggested. Lying in the Calaveras Valley, the region Calave Friday morning's quake occurred along the Calaveras Fault, which intersects with the Hayward Fault, a member of the San Andreas Fault system, according to the USGS and the University of California at Berkeley Seismological Laboratory. The Calaveras fault splays off the San Andreas fault near the Pinnacles National Monument in central California and extends northward over 160 km into the San Francisco Bay area where it apparently ends near the town of Danville. The fault cuts through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister. The San Andreas fault system is to the west, the Garlock fault is to the south and the faults of the Sierra Nevada are to the east. Why is the Hayward Fault considered more dangerous than the San Andreas Fault? Tracking the Elusive Calavaras Fault from Sunol to San Ramon along the well-known Calaveras Fault Zone runs through! 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