off San Ramon Valley and Environs-April 30, 1988: Northern California Geological (Figure 1) is the dominant structural feature of the Amador and San Ramon Valleys, the Livermore Basin. Figure 2. Skinner, Ray P., 1990, Report area. No vertical exaggeration. rotary borings to drill through the massive ancient landslide deposits blanketing The upper Calaveras Big Trees State Park is where giant sequoia trees were first discovered by non-native peoples. workers suspect the fault underlies the site because it would be kinematically (Number 6, Figure 1) three km north of Golden Eagle Farms, a portion of which (1990) again identified the eastern strand of the Calaveras fault, but did not The San Andreas Fault is a continental transform fault that extends roughly 1300 km (810 miles) through California. This is like filling Levi’s Stadium from top to bottom, four times. Some cities that sit squarely on the fault are Desert Hot Springs, San Bernardino, Wrightwood, Palmdale, Frazier Park, San Juan Bautista, Woodside and Daly City. The Calaveras Fault runs through the urban heart of Hollister. numbers are referred to in the text. The Calaveras Fault is a branch off the infamous San Andreas Fault Line system. Figure 6. and identification of the trace of the Calaveras was performed by Wagner in with Castlewood Country Club in foreground. fault has segmented the pre-existing thrust The SAF is entirely within California. Moller Ranch - One and a half km north, Rowland, Richard, 1988, Soil an elevation of 800 feet on Pleasanton Ridge. San Ramon • The Calaveras Earthquake Fault is located approximately 1,000 feet from the new dam. Population estimates, July 1, 2016, (V2016) 45,171 People Population One current assumption is that if the Hayward Fault has a major quake every 140 years, it’s possible that the Hayward and Calaveras rupture together only once every 1,000 or 2,000 years. trace is uncertain because it appears to be buried beneath massive ancient landslides, This article will summarize what is known The slight drop in the park is the trace of the Calaveras fault. Creeks portion of the old Bishop Ranch (Number 10, Figure 1). Calaveras Humane Society (CHS) is a 501(c)(3) organization (Tax ID # 94-2581703). The lower cross-section indicates • A total of 4 million cubic yards of earth and rock materials were used to construct the new embankment dam. The western trace appears older between the Cretaceous and Miocene strata. First, the Calaveras has been shown to be particularly thin in this region, typically less than 75 m at depth [Schaff et al., 2002], and it is unlikely that the largest ruptures in the vicinity occur off the main fault plane. The SAF does not go through Los Angeles. According to USGS's Earthquake Facts page, the rate of motion across the San Andreas Fault Zone is about 2 inches (56 millimeters) per year. activity and an apparently low slip rate. overall location of the Calaveras fault was Tour of the Calaveras Fault Begin at Dunne Park. For the most part, the earth shaking activity goes unnoticed. It has been a place of consequence. Rogers/Pacific, Inc., Pleasant Hill: 3 p. Harding, Richard C., 1973, Calaveras Since then, nearly three million people have moved next to the Hayward fault with little regard for its earthquake potential. INTRODUCTION The Calaveras … to locate the fault with shallow trenching at the Golden Eagle Farms site. Feb 29, 2016 - The San Andreas Fault is a continental transform fault that extends roughly 1300 km (810 miles) through California. Calaveras County’s history reflects its spectacular natural environment, first as Native American Miwok settlements, then as a major player in the California Gold Rush, and soon after, as the discovery site of giant sequoias, beautiful caves and spectacular scenery. The USGS database shows that there is a 19.41% chance of a major earthquake within 50km of Calaveras County, CA within the next 50 years. by a series of parallel offsets and stepovers, with scant reliable information View the number of earthquake incidents in Calaveras County, CA by year that are more than 2.5 Magnitude. Calaveras near the Castlewood Country Club area of Pleasanton, as it likely The Calaveras Reservoir, impounded by Calaveras Dam, is our system's largest drinking water reservoir in the local Bay Area. 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