These scenario earthquakes rupture 33 miles (54 km) of the Hayward fault extending from Fremont to Berkeley. It was long believed that there was no connection between the Hayward Fault and the Calaveras, but geological studies (particularly the examination of very small and deep earthquakes) suggest that the two may be connected. A 4.0 earthquake, centered in the Oakland Hills just north of Piedmont, rattled much of the East Bay and other areas of the central Bay Area this morning, jolting thousands of residents out of bed. The current estimates of the probability of a major earthquake on any of the numerous regional faults range up to 70 percent within the thirty-year period 2000–2029. the Hayward Fault Line ...) can happen, and how is has moved in the past. lake). Significant features were noted and marked. The transform boundary defined by the San Andreas Fault is not perfectly straight, and the stresses between the Pacific and North American Plates are diffused over a wide region of the West, extending as far as the eastern side of the Sierra Nevada Mountains. Fremont Earthquake Exhibit: The Hayward Fault Exposed, This geotourism exhibit (April through October 2006, now closed) featured a 12- to 15-foot (5 m) deep pit exposing the Hayward Fault, which could be viewed "face to face" from a shaded platform by descending a staircase. Engineers and much of the public had long recognized that a strong earthquake centered close to the bridge on either the Hayward or San Andreas faults could cause a complete collapse of the eastern span. Tule Ponds at Tyson Lagoon to Stivers Lagoon (pdf), October 21, 2018, 150th Anniversary The north and south ends are formed of new bridging sections that rest upon floating mats (foundations that do not penetrate the surface, rather sitting upon plastic sheets over level graded gravel and sand) where they pass over and near the fault, with appropriate sliding connections between the sections for the safety of spectators and the ability to absorb the relative rotation between the east and west fixed sections and the new north and south mobile sections. Copyright © 2020 UC Regents; all rights reserved, Explore the science behind a simulation of a magnitude 7 earthquake on the East Bay's Hayward Fault and learn what it could mean for shaking potential in your area. The various ABAG maps shown below represent some of the more likely possible combinations. Hayward (/ ˈ h eɪ w ər d /; formerly Haywards, Haywards Station, and Haywood) is a city located in Alameda County, California in the East Bay subregion of the San Francisco Bay Area.With a 2019 population of 159,203, Hayward is the sixth largest city in the Bay Area and the third largest in Alameda County. Subsequent seismic analysis indicated the possibility that the overfill could fail due to agitation, allowing the buoyant tube to float upward, misaligning the tracks and possibly overstressing the bolted connections. The ground moves about 6-12 inches (0.2-0.3 m) at locations close to the fault. An earthquake may cause minor landsliding on some slopes of the freeway, and the plastic movement of the fill would likely disrupt the pavement if the movement here of the surface displacement is substantial, possibly presenting a hazard to motorists and shutting down the highway for a while. The San Andreas fault travels through much of the coastal area of Califor-nia, traversing San Mateo County, west of Fremont on the San Francisco peninsula. In October 2016, scientists found definitive evidence that the Rodgers Creek Fault and the Hayward Fault are linked together under San Pablo Bay. Dismantling of high pressure and temperature process units and the consequent fire danger to personnel and equipment could produce substantial economic consequences for the western states. As the bulk of cargo containers from the Port of Oakland travel on these two roads, the disabling of both would cause severe disruption of West Coast import and export goods, owing to the consequent overloading of other West Coast container handling ports. Memorial Stadium supporting columns diverging at the top due to, Potentially impacted structures and features, Electrical and communication system disruption. Most of the severe effects of that event were due to poorly responding soil conditions and design deficiencies in large structures. "The Hayward Fault: America's Most Dangerous? This fault is about 74 mi (119 km) long, situated mainly along the western base of the hills on the east side of San Francisco Bay. The magnitude of an earthquake, as indicated on a seismic scale, is roughly proportional to the length of the rupture, while the ground motion in the region surrounding the fault is highly dependent upon the local soil conditions, somewhat upon the distance and relationship to the progression of the fault rupture, and (as recently recognized in the 1989 Loma Prieta earthquake) reflected energy from deep discontinuities in the Earth's structure. To share this video via email, copy and paste the message and URL below into your favorite email client and send. The new finding means that the Rodgers-Hayward system together could produce a quake with a magnitude as high as 7.2. The Hayward Fault runs along the foot of the East Bay hills, something that all residents of the Bay Area, and the East Bay in particular, should know. Moreover, they have a 51% chance of a M≥7 (threshold to be considered a "major" quake), a 20% chance of a M≥7.5 and a 4% chance of a M≥8 (a "great" quake) when all the mapped faults in the region are taken in to account.. In its northern extent, the Hayward Fault lies directly beneath the portion of Highway 13 (the Warren Freeway) that is south of its intersection with Highway 24 and north of its terminal connection with Interstate 580 (the MacArthur Freeway). Highways 80 and 880 and the Port of Oakland. They provide the posters and map for the Faulted Floor I went to Central Park and saw the Hayward Fault Exposed ebhibit. A November 9, 2004, construction accident on this pipeline system in Walnut Creek killed five people. There is the possibility that a large earthquake could trigger very large earth flows, particularly if the soils are seasonally saturated with water, possibly rendering extensive areas unbuildable. The surface of the fault is creeping at less than 0.5 cm (0.2 in) per year in the regions of concern. A replacement of the eastern span was completed in August 2013. The Hayward fault is one of only a few dozen faults in the world that “creeps,” or slowly moves. A U.S. Geological Survey scenario for a 7.0 earthquake on the Hayward fault envisions it rupturing for 52 miles from San Pablo Bay to Fremont. The average slip or offset across the fault is about 2 ft (0.7 m). More extensive disruption and greater hazard could be caused by the failure of elevated structures, both those over which the highway passes and overcrossings of the freeway, of which there are two nearby. The Southern Loop was completed in 2002, while the seismic retrofitting of the Claremont tunnel was completed in February 2007.. Water could be cut off to 2.4 million people living in California's San Francisco Bay Area. Earlier earthquakes have been detected by trench exposure and associated radiocarbon dating. You can also find maps of the fault path without having to use Google Earth. North to south, it runs from just west of Pinole Point on the south shore of San Pablo Bay and through Berkeley (just under the western rim of the University of California’s football stadium). is a government agency that Federal Large liquid storage tanks are protected by berms that are designed to contain the contents should a tank fail under normal conditions. The Hayward fault is considered to be particularly dangerous due to the poor soil conditions in the alluvial plain that drops from the East Bay Hills to the eastern shoreline of San Francisco Bay.
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