Nearly two years ago, on August 24, 2014, just south of Napa, California, a fault in the Earth suddenly slipped, violently shifting and splitting huge blocks of solid rock, 6 miles below the surface. Contributed by NC 4 ; Regional Information. Some suggestions for standardizing the collection and dissemination of post-earthquake field reconnaissance data are provided herein. The Mw 6.0 South Napa earthquake of August 24, 2014, produced complex and extensive surface faulting and other ground deformation features. A Year After South Napa Earthquake, Damage Proves Widespread and Costly Ninety-one percent of respondents in CEA research experienced some kind of damage SACRAMENTO, Calif., August 24, 2015 – The California Earthquake Authority (CEA) today announced preliminary findings of research on how the 6.0-magnitude earthquake that struck Napa one year ago today affected single-family homes. Ponti, D.J, Rosa, C.M, and Blair, J.L., 2019, The Mw 6.0 South Napa earthquake of August 24, 2014—Observations of surface faulting and ground deformation, with recommendations for improving post-earthquake field investigations: U.S. Geological Survey Open-File Report 2019–1018, 50 p., 15 appendixes, https://doi.org/10.3133/ofr20191018. Nicholas Dillon was gravely injured after many bricks from a chimney fell on him. The South Napa earthquake along the San Andreas Fault reached 6.0, caused roughly $1 billion in damage, injured 200, killed one and jolted plenty of nerves. The earthquake was the largest earthquake in the Bay Area since the magnitude 6.9 1989 Loma Prieta earthq… Disaster relief: South Napa Earthquake. The “South Napa Earthquake” is the largest earthquake to have affected the Bay Area since the 1989 Loma Prieta earthquake. Following the event, geologists made more than 1,200 field observations at locations where tectonic faulting and ground failure produced visible deformation that fractured and disturbed the ground surface. LockA locked padlock [10] At least twelve aftershocks followed, including one of magnitude 3.9. The preferred fault model for the 2014 South Napa earthquake has a cumulative seismic moment of 1.28 × 10 18 Nm during its 8 s of coseismic rupture. Such surface eruptions hadn’t been seen in a Northern California earthquake since 1906, researchers said. Other aspects of the event included an experimental earthquake warning system that alerted seismologists several seconds before the damaging shear waves arrived, temporary changes in springs and wells, and the potential for postseismic fault creep. The event was then the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake, which measured 6.9 on the moment magnitude scale, but was later surpassed by the 2014 South Napa earthquake. The results of this compilation reveal that faulting occurred within a 2-km-wide zone on six, roughly parallel traces within the West Napa Fault System. The South Napa earthquake response was one of the first times when post-earthquake reconnaissance data were mostly collected and disseminated electronically. Secure .gov websites use HTTPS The earthquake … Residential structures and wineries surrounding this area were significantly damaged. A water main on Mare Island broke. Extensive ground deformation also occurred off the principal fault traces. The system being developed at the Berkeley Seismological Laboratory (called ShakeAlert) in conjunction with the United States Geological Survey, the California Institute of Technology and the University of Washington, will eventually cover the entire West Coast. The South Napa earthquake produced rare fissures. [34], The event was credited with large, temporary increases in the water flow of several nearby streams, including Carriger Creek, Calabasas Creek, Felder Creek, Sonoma Creek, Tulocay Creek, Green Valley Creek, and Wild Horse Creek. Caption: A map shows the location of the August 24, 2014 earthquake just south of Napa, California. [18], Following the first round of building inspections by the City of Napa inspectors, a total of 613 structures had been tagged; 113 were red-tagged and 500 had been yellow-tagged. 4 . [44], 24 August 2014 earthquake centered in Napa, California, USA, "M6.0 – 6km NW of American Canyon, California", "Napa quake damage rises to $362 million", Napa, Calif., earthquake: Economic hit could reach $1 billion, "Napa's people, buildings hit hard by 6.0 earthquake", "Boats, grapes and Poseidon at Napa quake's epicenter", "The Mw 6.0 24 August 2014 South Napa Earthquake", "Northern California earthquake is area's strongest in 25 years", "After earthquake near Napa, up to 100 homes labeled unfit to enter", "Strong Earthquake Shakes Northern California", "Napa quake: Obama declares major disaster, freeing up aid", "Earthquake damage repaired, Napa's Native Sons building shines again", Northern California earthquake: Blue-collar Vallejo hit hard, "Earthquake cracks, buckles roads, but leaves bridges OK", "Wine industry tallies spilled wine, shattered barrels", "Napa quakes causes $80 million blow to wine industry, report says", "Napa tallies earthquake damage across city", "Napa earthquake death: 2 weeks later, quake claims first victim -", "First earthquake-related death reported", "Crumbled by Napa earthquake, Uptown Theatre mural rises again", "First Presbyterian church returns to quake-damaged sanctuary after almost two years", "After earthquake repairs, Napa Methodist church to reopen Sunday", "Napa awards repair contract for quake-damaged Goodman Library", "Napa's old post office sold for $2 million for a hotel", "Repair of earthquake damage to Napa courthouse to start soon", "Trefethen rebounds after the earthquake", "Napa quake jumpstarts stream flows, though probably only temporarily", "Surprise bonanza since Napa quake: dry creeks now flowing", "After big quake, Napa fault could move 6 inches in 3 years", "Napa's surprise fault line triggers earthquake study of the region", "Experimental warning system gave 10-second alert before California earthquake", "In Latest Calif. Earthquake, Shake Alert Tests Its Legs", "Expanding Earthquake Warning System May Help the Public", "California receives U.S. funding for earthquake early-warning system- LA Times", SCEC's Response to the South Napa Earthquake, The August 24, 2014 South Napa Earthquake: What Is Known So Far, Accessing Open Information And Preliminary Ground Motion Simulations, California earthquake strikes San Francisco Bay area, Quake rocks California wine country, dozens injured, Mapping of the West Napa Fault Zone for input into the Northern California Quaternary fault database, Study: 2014 Napa quake may be linked to groundwater changes, https://en.wikipedia.org/w/index.php?title=2014_South_Napa_earthquake&oldid=993842594, Creative Commons Attribution-ShareAlike License, This page was last edited on 12 December 2020, at 19:52. In addition, the water levels of several wells in the Sonoma Valley rose suddenly at the time of the quake, in one instance by 5 feet (1.5 m). South Napa, USA Earthquake Clearinghouse M6.0 AUGUST 24, 2014 AT 10:20:44 UTC. Earthquake warning systems could potentially give people time to take cover in the event of a quake, preventing injuries caused by falling debris, automatically stopping trains or shutting off gas lines. Number and percentage of households reporting injuries after the South Napa earthquake, by injury characteristics — Napa At 6.0 on the moment magnitude scale and with a maximum Mercalli intensity of VIII (Severe), the event was the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake. [15] Several newer commercial buildings also suffered damage. 9 . Open-File Report The rupture has an average rupture velocity of 3.0 km/s and a peak slip of 2.24 m. Figures 3 a– 3 c show the spatial distributions of slip, rise time, and average slip rate, respectively. [43] In December 2014, United States Congress approved a $5 million allocation as part of the Consolidated Appropriations Act, 2014 in order to expand funding for development of the system. Governor Brown declared a state of emergency on August 24, 2014 2. Following the event, geologists made more than 1,200 field observations at locations where tectonic faulting and ground failure produced visible deformation that fractured and disturbed the ground surface. Another 900 to 1,000 properties have yellow tags. [18] CNN reported one individual still in critical condition, later discovery determined as a 58-year-old male who went through two surgeries, awakening four days later in ICU to discover it was going to take him approximately two years to learn how to walk again. M6.0 South Napa Earthquake M6.0 South Napa Earthquake. [1] The United States Geological Survey (USGS) estimated that 15,000 people experienced severe shaking, 106,000 people felt very strong shaking, 176,000 felt strong shaking, and 738,000 felt moderate shaking. [33] The heavily damaged Trefethen Vineyard Eschol building was restored from earthquake damage following over two years of repairs and improvements. State Sen. Bill Dodd issued a … More information "South Napa" M6.0 earthquake occurred west of Catalog CDI Responses Source check NC VIII 41269 US 5 . Officials ride Napa Valley Wine Train to spur tourism. More than 170 … The earthquake was the largest to affect the San Francisco Bay area in 25 years and caused significant damage in Napa and Solano counties, including widespread power outages, five residential fires, and damage to roadways, waterlines, and 1,600 buildings (2). [9] At least six of the injuries were classified as critical. In Napa, 62 properties remain red-tagged, meaning they are too dangerous to access. Scientists have gathered at the USGS headquarters in Menlo Park to review the effects of the South Napa Earthquake. [10] Governor Jerry Brown declared a state of emergency due to the severe damage and the possibility of aftershocks. Several wine storage facilities also suffered damage and loss of property. This report is an overview of Governor Brown declared a state of emergency on August 24 2, … Initially this was reported to be a 10-second warning in Berkeley,[39][40] but revised information indicates only a 5-second warning was provided. browser may not display or print as intended. Home; Resources; Photo Gallery; Data Map; How to Contribute ; About; Donate; View geolocated imagery and data collected for this earthquake in two ways: DATA MAP. On August 24, 2014, the northern San Francisco Bay Area was struck by the largest earthquake to impact the Bay Area since the 1989 M6.9 Loma Prieta earthquake. Revising archival accounts of the 1898 earthquake, I estimate a lower intensity magnitude, 5.8, than the value in the current Uniform California Earthquake Rupture Forecast (UCERF) catalog (6.4). Deformation characteristics of these features were not consistent with either primary faulting or shaking-induced ground failure and remain enigmatic, although this report includes speculation about possible origins. The incident period was from August 24, 2014 to September 7, 2014. In addition, a M3.0 earthquake … 16th World Conference on Earthquake, 16WCEE 2017 Santiago Chile, January 9th to 13th 2017 2 1. These strainmeters are located between 24 and 80 km from the source, and the observed offsets ranged up to 400 parts per billion (ppb), which exceeds their nominal precision by a factor of 100. Federal assistance took over two months to be made available after the earthquake, meaning residents had to financially cope on their own for 60 days. 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