hayward fault earthquake

We conducted a paleoseismic investigation to better understand the Hayward fault's past earthquake behavior. So while there is creep at the ground surface, large (M~7) earthquakes tend to occur on average every 161±65 years. Earthquake Science Zones: There will be two sites that people could ask scientists and educators about the science behind the Hayward Fault. In the simulation, the earthquake starts at the very northern section of the fault near Richmond and ends near Hayward. This fault is capable of M 7 earthquakes and presents significant ground motion hazard to the heavily populated East Bay, including the cities of Oakland, Berkeley, Hayward and Fremont. Along the Hayward fault, sometimes there is a series of earthquakes that all have similar magnitudes (a swarm) … Illustration of the double-difference earthquake relocation algorithm. The online version of “The Coming Bay Area Earthquake, 2010 Update of Scenario for a Magnitude 7.0 Earthquake on the Hayward Fault” (PDF file, 3.5 MB) is now available. It will (hopefully) give you a few seconds to react to the earthquake before it arrives… The Hayward fault is a major strike-slip fault on the eastern side of the Bay Area. Fremont Earthquake Exhibit. San Lorenzo Creek runs through the city. Last year there was an M=4.4 earthquake in the Piedmont area, which is pretty close to the swarm of quakes that hit in the past 2 days, although unlike today’s quake, it was not on the main strand of the Hayward Fault. Pallett Creek, CA (after Sieh, et al. It was closer to San Leandro where the fault slipped about 6 feet. The Hayward fault where the quake shook lies beneath a highly populated area in the Bay—and the next "big one" could be a magnitude 6.8 to 7 earthquake. … It was approximately a magnitude 6.9. At the exhibit, the fault slid about 3 feet. The Hayward Fault in the East Bay is considered the most dangerous earthquake fault in America. The U.S. Geological Survey describes the Hayward Fault as “the single most urbanized earthquake fault in the United States.” Picture via Temblor According to the U.S. Geological Survey, the average rate of creep on the Hayward is 4.6 millimetres per year or about the length of a standard black garden ant, or a quarter of a jelly bean. These large earthquakes were both regular and frequent, as indicated by a 0.40 coefficient of variation and mean recurrence interval (MRI) of 161 ± 65 yr (1σ of recurrence intervals). Set up mobile alerts and/or download the MyShake app, an early earthquake warning system which alerts you when it detects significant earthquakes. The Hayward Fault is thought capable of generating a magnitude 7.5 quake. In the 2010 update, the significant points from the 1996 report are summarized and then updated information is provided. All these faults are created by the Pacific Plate traveling … The Hayward Fault, or more correctly the Hayward Fault Zone, is a large geological fault zone located along the western base of the hills on the east side of San Francisco Bay. The last major rupture occured in 1868 with an M 6.8-7.0 event. Search for other works by this author on: GSW. The threat to San Francisco from the Hayward fault was recognized by A. C. Lawson in 1908 in Report of the State Earthquake Commission, The California earthquake of April 18, 1906, p. … The last major quake along the Hayward fault happened in October of 1868, when a magnitude 6.8 hit the San Francisco Bay region, making it the most destructive earthquake in the state’s history. Studies of the fault reveal that it has produced 12 large earthquakes in the past 2000 years spaced 100-220 years apart. Page 75 of The online version of “The Coming Bay Area Earthquake: 2010 Update of Scenario for a Magnitude 7.0 Earthquake on the Hayward Fault published by the Earthquake Engineering Research Institute describes the situation vividly. To the west is the well-known San Andreas fault. We’ve updated this video: https://youtu.be/GhFMtCmHc9cOctober 21st will mark the 141st Anniversary of the 1868 Hayward Earthquake. Updated October 21, 1868 (Credit: U.S. Geological Survey) Alameda County Courthouse in San Leandro collapsed and severely damaged. To the east is the Calaveras fault and further east is the Clayton-Marsh Creek-Greenville fault. Where possible, original chapter authors were interviewed and many assisted in updating their contributions. Earthquake science was still young, but the architects apparently realized that the Hayward is a fault, where two pieces of crust move past each other. The Hayward fault is a major strike-slip fault on the eastern side of the Bay Area. The fault slipped 3 to 6 feet along the fault. (The Bancroft Library, UC Berkeley) When a bigger one came along on the San Andreas Fault in the spring of 1906, the Great-Quake moniker was reassigned. The Hayward Fault is part of the San Andreas Fault system. The last big earthquake along the Hayward Fault was in 1868. Earthquake Stress Drops and Inferred Fault Strength on the Hayward Fault, East San Francisco Bay, California Jeanne L. Hardebeck; Jeanne L. Hardebeck U.S. Geological Survey, Menlo Park, California. It extends approximately 50 miles along the foot of the East Bay hills, from south Fremont into the San Pablo Bay. Its last major rupture occurred in 1868, during California's frontier days, and was the original "Great San Francisco Earthquake" until 1906.. The past five large earthquakes on Hayward fault have been about 140 years apart , so this fault and the Rodgers Creek faults are the most likely to have a major earthquake in the bay. Abstract. The United States Geological Survey has stated that there is an "increasing likelihood" of a major earthquake on this fault zone, with potentially serious resulting damage. This fault is capable of M 7 earthquakes and presents significant ground motion hazard to the heavily populated East Bay, including the cities of Oakland, Berkeley, Hayward and Fremont. Your article made me think of the presentation at NCGS about the massive computer modelling done on the Hayward Fault that surprisingly, showed much higher ground motions east of the fault than west! History shows that five large earthquakes on the Hayward fault have occurred on average every 150 years—last being in 1868. The Hayward fault, a major branch of the right-lateral San Andreas fault system, traverses the densely populated eastern San Francisco Bay region, California. Luke Blair and Susan Garcia (both from the U.S. Geological Survey showcased the "Faulted Floor" where 60 years of "creep" along the Hayward Fault can be seen. The earthquake will cause $90.4 billion damage to residential buildings and 96.4 to commercial buildings. While some creeping faults are completely unlocked and do not build up the significant stress needed to generate large earthquakes, the Hayward Fault is only partially locked. The fault broke for about 30 miles from around Milpitas to the Oakland-Berkeley border. Earthquake Stress Drops and Inferred Fault Strength on the Hayward Fault, East San Francisco Bay, California Bulletin of the Seismological Society of America 2009 99:3 pp.1801-1814 2010 – Brad T. Aagaard, Robert W. Graves, David P. Schwartz, David A. Ponce, Russell W. Graymer The Hayward fault runs through UC Berkeley campus (US $1 billion seismic upgrade program) Recurrence - historical records Recurrence: geological evidence e.g. The Hayward Fault may be less well-known than the San Andreas Fault, but seismologists now call it a time bomb that could kill nearly a 1,000 people and injure tens of thousands more. If that is the case, the longer fault system could … Now think about how we'll do in an earthquake when our roads will be impacted (the Hayward Fault runs right over 680 and many main transportation corridors!). The fault is around 119 km long and offers the potential for generating very destructive earthquakes. The Hayward Fault Zone is a geologic fault zone capable of generating destructive earthquakes.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.It runs through densely populated areas, including Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Castro Valley, Hayward, Union City, Fremont, and San Jose. One Response to “Earthquake advice for Oaklanders 2: The ground” mpetrof Says: 14 September 2020 at 3:40 pm. While the effects of these earthquakes may differ from place to place, a major earthquake on the Hayward fault is not an exclusive East Bay concern and a San Andreas event is not an exclusive San Francisco concern. Shaking severity from an hypothetical earthquake on the Hayward fault. Afterward, the county seat moved to Oakland. You when it detects significant earthquakes hayward fault earthquake starts at the exhibit, the fault is thought of... 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