calaveras fault hollister

We’re going to be looking at slip-strike faults and at one specific example in particular – the Calaveras Fault in Central California. Manifestations of right-lateral creep on Calaveras fault (dotted line), Hollister, California. Unlike the San Andreas Fault, which is usually locked for many years until it shifts and causes an earthquake, the Calaveras Fault is creeping steadily along at about half an inch per year. It was a piece of land owned by a man, William Welles Hollister, from 1818-1868. The East Branch of the Calaveras Fault as mapped pursuant to the Alquist-Priolo Earthquake Fault Zoning Act covers more than 50 acres of the City of Hollister’s Downtown area. The Calaveras Fault (a branch of the San Andreas Fault system) bisects the city north and south, roughly along Locust Ave. and Powell St. SAF and CF traces were located to within ±5 and 2 m, respectively. The fault cuts through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister. The 140 km‐long Central Creeping Section of the San Andreas fault (CSAF) and adjacent 40 km of the southern Calaveras fault (CF) reach from San Juan Baptista and Hollister, CA to Parkfield, CA, and are bounded by locked fault segments that ruptured in large earthquakes in 1906 (northwest) and 1857 (southeast; Figure 1). Measuring a fault slip rate is challenging. The Calaveras fault zone extends more than 170 km from south of Hollister to Suisun Bay and appears to be related to historically active faults to the north. Hollister sits in a wide valley between the Diablo Range of hills to the east and the Hollister … The 2005-2023 General Plan replaced the commercial designation in Hollister’s downtown core with a commercial and high density residential mixed use designation. Feb 19, 2016 - Hollister California Calaveras fault "San Andreas" geology earthquake Sunglasses for scale. The streets running east/west across the fault have significant visible offsets. The Sargent Fault zone runs through the Lomerias Muertas (Flint Hills). It's on Sixth Street across from Dunne Park. The Calaveras and San Andreas Faults In and Around Hollister 39.5 Traffic light at intersection of Route 156. This fault and its southern continu- ation, the Paicines fault, are part of right-slip fault zones that branch northeastward from the San Andreas fault south of Hollister (Figure 1). Hollister is well-known among geologists because it portrays one of the best examples of aseismic creep anywhere in the world. Structural Setting In central California the San Andreas fault is a boundary between the Salinian block to the west and the Franciscan assemblage and overlying strata of the Great Valley sequence to the east (Figure 1). Over the past ten years we have made over 800 measurements of slip rates at 20 sites on various faults in the San Francisco Bay region. (2020). In the area of the August 6, 1979 earthquake, the Calaveras fault zone is within the Diablo range foothills east of the Santa Clara Valley. active Calaveras fault passes right through the City, making Hollister one of only a handful of places where active faulting can be seen at the ground surface in an urban area. This fault also runs behind Mission San Juan Bautista, about seven miles west of Hollister. Correction: Both the San Andreas Fault and Calaveras Fault pass through San Benito County, but only the Calaveras Fault runs through Hollister. The creep rate along the San Andreas Fault and nearby Calaveras Fault from this study are shown in the purple to yellow colored line. The surface trace is offset by several kilometers … Hollister,California sits on the Calaveras fault zone and right next to the San Andreas Fault Creeping and Santa Cruz Mountain sections. All you have to do is take a walk. Pen for scale. Three other active faults near the MWDM array are also shown in Fig. Definitions of Hollister, California, synonyms, antonyms, derivatives of Hollister, California, analogical dictionary of Hollister, California (English) The low hills on either side of the road are pressure ridges along the Calaveras Fault. Structural Setting In central California the San Andreas fault is a boundary between the Salinian block to the west and the Franciscan assemblage and overlying strata of the Great Valley sequcncc to the east (Figure 1). The Calaveras fault is a predominantly right- lateral strike-slip fault that exhibits aseismic slip along much of it's surface trace. refine the fault geometry in the Hollister region. Many sidewalks, walls, buildings, curbs and streets in the area are slowly moving apart due to the slow and steady fault movement. Hollister is located just North of where this happens, right on top of the Southern end of the Calaveras fault. The Calaveras fault, a portion of the fault boundary between the North American and Pacific tectonic plates, bisects the Hollister array along a line striking NNW to SSE. refine the fault geomehy in the Hollister region. 20 May 1978. Fault Creep locations you can virtually visit Calaveras fault, Hollister, California Visit pleasant Hollister, California, unfortunately built directly on top of the creeping Calaveras fault, which makes it one of the world's premier tourist attractions (at least for earthquake seismologists!). Credit: modified from Scott et al. The Calaveras Fault and lost seismograms . 11 May 2002. Another impressively creeping fault is the very southern end of the Calaveras fault in the town of Hollister. Continue on Route 25 South. ECV 3-2 LEWICKI ET AL. This schist is intruded by the metamorphosed Alamos Tonalite, which has been dated 145 Ma. With a slip rate of about 15 mm/yr (0.6 in/yr) and a length of about 100 km (60 mi), the Calaveras is highly active and certainly capable of a M7+ earthquake. Hollister is well known among geologists because it portrays one of the best examples of aseismic creep anywhere in the world. The San Andreas Fault runs through the Southern side of the Sn Juan Valley and crosses the Hollister Hills. The Calaveras fault, part of the San Andreas fault system, is one of the most seismically active faults in central California. Parkfield and Calaveras fault (CF) in Hollister. Three other active faults near the MWDM array are also shown in Fig. 1. We can also see fault creep wherever the San Andreas Fault crosses California Highway 25 south of Hollister. Thiss in turn is used to model the topography of the Hollister region using elastic dislocation theory. You can especially see it at Dunne Park between Sixth and Seventh Streets. Data from a precision multi-wavelength distance measuring (MWDM) instrument, located near Hollister, California, have been analyzed in terms of strike-slip faulting in the region covered by the network. dreas fault and north of Hollister on the Calaveras fault.) Thiss in turn is used to model the topography of the Hollister region using elastic dislocation theory. Calaveras Fault in Hollister, California. The Calaveras fault zone is part of a system of active faults which branch from the San Andreas fault south of Hollister. The Hayward Fault extends from San Pablo Bay where it joins up with the Rodgers Creek Fault, to south of San Jose, where it merges with the Calaveras Fault, a length of 140 mi (230 km). A stratigraphic column would start with the oldest rocks, the Santa Cruz Island schist, forming an elongated core of the island, 10 miles long and 1.5 miles wide. : SHALLOW SOIL CO 2 FLOW. The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. (2012) claims that “hollister was built directly on the highly geologically active Calaveras Fault, a strand of the greater San Andreas Fault system.” According to David (2016) on November 19th, 1868, Hollister became a town in California. 1. The system may extend along the entire length of the northern Coast Ranges (Herd, 1978). This bend was caused by the Calaveras Fault. Unfortunately for us seismologists, nature is rarely black or white. Four episodes of deformation that are readily identifiable in the MWDM data for the year following September 1975 can be modeled as slip on the Calaveras fault. We’re going to find this fault and then follow its trace in Hollister, California. A House on the Calaveras Fault - panoramio.jpg 429 × 322; 35 KB. Media in category "Hollister, California" The following 64 files are in this category, out of 64 total. It runs through Hollister, California and is most evident in the vicinity of Dunne Park. Major faults include the Santa Cruz Island Fault and the Santa Rosa Island Fault. “But it would be even greater if the rupture extended south to Hollister, where the Calaveras Fault meets the San Andreas,” she said. At these crossings the asphalt is cracked in a distinctive pattern. The white lines indicate faults recognized by the USGS. Like the other faults in the system the Calaveras is a right-lateral, strike-slip fault. The Calaveras fault is a predominantly rightlateral strike-slip fault that exhibits aseismic slip along much of it's surface trace. Starting at the red star at right, begin your tour of Hollister's seismic claim to fame by walking west along 6th or 7th Street to Dunne Park. The alternation occurs whether or not the times of faster slip are triggered by any nearby seismic event(s). Downtown Hollister is known as one of the “Earthquake Capitals of the World” because it was built on the Calaveras Fault which is a strand of the San Andreas Fault. The researchers found that the underground portion of the Hayward Fault meets the Calaveras Fault 10 kilometers farther north than where the creeping surface traces of both faults meet. Curb displaced right-laterally by creep on Calaveras fault (dotted line), north side of 6th Streeet, Hollister. The Calaveras fault, a portion of the fault boundary between the North American and Pacific tectonic plates, bisects the Hollister array along a line striking NNW to SSE. The Calaveras Fault, a major branch of the San Andreas Fault, starts somewhere south of Hollister and actually runs through town. : 1,9. Bent wall and sidewalk, 5th Street, 11 May 2002 : Bent curb and gutter, 7th Street, 29 July 1989 . Measuring fault motion from a shifting landscape . The Calaveras-Paicines The Calaveras fault in the Hollister area moves episodically, with shorter times of more rapid slip alternating with longer times of slower slip. Most earthquake faults are neither … The Bay Area fault system and the spot (red star) where the Hayward Fault branches off from the Calaveras Fault. Hollister is a major agricultural producer for Central California, as well as the home of numerous wineries within the San Benito Valley AVA.. Hollister is well-known among geologists because it portrays one of the best examples of aseismic creep anywhere in the world. The Calaveras Fault (a branch of the San Andreas Fault system) bisects the city north and south, roughly along Locust Ave. and Powell St. given day, we measured effluxes sequentially along tra-verses oriented perpendicular to the SAF and CF fault traces. One thing that is almost certain in Hollister, if you’re downtown when the next big one strikes you may have to drop, cover, and hold on, but you will be a whole lot safer than those who were there in 1989, when the Calaveras Fault shook below San Benito Street and decimated the 400 block, bringing down buildings and knocking homes off their foundations.

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