Download Full PDF Package. The InSAR data are from the Sentinel-1A (S1A) and COSMO-SkyMed (CS) satellites, and GPS data are provided by Nevada Geodetic Laboratory. Yountville, Vallejo, and American Canyon were also damaged. ShakeCast is an application for automating ShakeMap delivery to critical users and for facilitating notification of shaking levels at user-selected facilities. They walked across the landscape to trace where the fault had ruptured the Earth’s surface, and mapped the earthquake surface rupture and post-earthquake afterslip, in great detail using mobile laser scanning (a truck-mounted Lidar system), alignment arrays (such as creepmeters that directly measure extremely small fault movements), GPS measurements, and satellite-based radar surveys (InSAR and UAVSAR). Pavement buckling and tented sidewalk resulting from compressional forces at north end of main fault rupture, Sandybrook Lane, Napa California. Observing how seismic waves travel along a complex fault zone can reveal how fault segments might be connected at depth. The 6.0-magnitude quake struck at 3:20 a.m. local time near American Canyon, about 6 miles southwest of Napa, at a depth of 6.7 miles. We can use this increased knowledge to make our communities safer and more resilient in future quakes. This kind of hydrogeologic response to earthquakes is well known to scientists. Depth. For example, the surprising amount of afterslip observed gave scientists a new way to look at and forecast continuing hazards in the weeks to months, after the earthquake occurred. Office of Communications and Publishing12201 Sunrise Valley DriveReston, VA 20192United StatesPhone: 703-648-4460. 6.0 mw. Download PDF. The city of Napa was very strongly shaken: many historical masonry buildings and older residences were damaged. Previous smaller earthquakes in the area also triggered relatively few aftershocks for their size, suggesting that this area doesn’t produce many aftershocks. Low-magnitude aftershocks missing from the network catalog are detected by applying a matched-filter approach to continuous seismic data, with the catalog earthquakes serving as the waveform templates. As expected the geometry is in good agreement with the aftershock distribution. The 2014 South Napa earthquake occurred in the North San Francisco Bay Area on August 24 at 03:20:44 Pacific Daylight Time.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.The epicenter of the earthquake was located to the south of Napa and to the … With each earthquake experienced, scientists learn more about the hazards, and how the natural and built environment will respond. M6.0 South Napa, California Earthquake – August 24, 2014 What We Know After One Year Mapped faults and seismicity (magnitude 3+, 1947-2007) prior to the August 24, 2014 South Napa earthquake. Building damaged in 2014 South Napa earthquake. EARTHQUAKE AND EARTHQUAKE NOTIFICATION – AUGUST 24, 2014 AT 3:20 AM (PDT) The magnitude 6.0 South Napa Earthquake occurred on August 24, 2014 at 3:20a.m. The Mw 6.0 South Napa earthquake, which occurred at 10:20 UTC 24 August 2014 was the largest earthquake to strike the greater San Francisco Bay area since the Mw 6.9 1989 Loma Prieta earthquake. Damage to structures decreased with distance from the rupture. The California Integrated Seismic Network detected the South Napa earthquake immediately, and the first ShakeMap, issued four minutes after the earthquake, depicted the violent shaking in the immediate area. "Northern California earthquake" has 1,220,000 hits whereas "South Napa earthquake" has 187,000 hits. The earthquake woke people throughout northern California, in cities as far away as Sacramento and Santa Cruz. Magnitude. This detailed assessment of the South Napa earthquake and the West Napa Fault system helps scientists assess future earthquake hazards in the area so communities can better prepare for them. Results suggest the West Napa Fault and the Franklin Fault (to the southeast) may be continuous at depth. Cullen328 Let's discuss it 02:24, 26 August 2014 (UTC) Right now if you Google, California, "Northern California earthquake" is the top series of hits. The seismic hazard posed by the West Napa Fault System is still being evaluated. The 2000 M4.9 earthquake near Yountville is shown as a white star, and the South Napa earthquake is shown as a yellow star. It was the largest event in the San Francisco Bay … The tremor’s epicenter was located south of Napa, approximately 3.7 miles (6.0 km) northwest of American Canyon near the West Napa Fault, beneath the Napa Valley Marina on Milton Road, just west of the Napa County Airport. 11.1 km. The South Napa earthquake was very well recorded and produced a number of strong ground motion recordings that are of considerable interest to the engineering community. The "Did You Feel It?" USGS PAGER Assessment for the 2014 South Napa Earthquake with initial estimates of fatalities and economic loss. By continuing you agree to the use of cookies. The sharp rise starting on August 24 reflects an increased streamflow due to the South Napa Earthquake. The magnitude 6.0 South Napa Earthquake of August 24, 2014, took the lives of two people, injured 300 others, and caused moderate to severe damage to more than 2,000 structures. Hydrograph showing stream flow in cubic feet per second on USGS streamgage on Sonoma Creek near Agua Caliente, from about August 23 - September 13, 2014. Recent advances in technology let to more rapid assessment of the nature and effects of this quake, showcasing significant advances since the previous big quake in the San Francisco Bay area in 1989 – the magnitude 6.9 Loma Prieta earthquake. Our better scientific understanding of the 2014 earthquake sheds light on the nature of earthquake faults and hazards in the region, and will enable communities to be better prepared and better able to withstand the next earthquake. The earthquake was the largest ever recorded in the state, substantially exceeding a 5.1 magnitude earthquake which struck near Fairview in February 2016 and slightly more powerful than the 5.7 magnitude 2011 Oklahoma earthquake in Prague, Oklahoma. Earthquake Outlook for the San Francisco Bay Region 2014–2043. Fault Plane Solution. The sharp rise starting on August 24 reflects an increased streamflow due to the South Napa Earthquake. There was one fatality due to the earthquake, and at least $500 million in economic losses. These recordings are being used, in part, to better understand the performance of residences and older masonry buildings that have been retrofitted. It is one of the first damaging earthquakes to strike a major metropolitan area in the State of California in over two decades. Older structures tended to experience more damage than more recently built structures Earthquake retrofitting of older structures can help to minimize damage in future earthquakes. Fault traces and other lineaments show levels of afterslip hazard. Seismological Research Letters, 2015. READ PAPER. These activities resulted in a comprehensive understanding of fault motion and ground response, in ways that could not have been imagined the last time (1989) there was a large quake in the San Francisco Bay Area. 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