Satellite image of the Napa Valley in California. The fault rupture (mapped by UC Davis scientists) resulting from the August 24 earthquake is shown by the black line, south-west of Napa. It runs through the lava hills on the east side of Green Valley. Napa’s surprise fault line becomes earthquake lab ... Scientists drove a truck up and down the Napa Valley, using lasers to measure the “afterslip” shifting roadways and vineyards. M5.5 and M5.2 earthquakes hit warning areas in California and Nevada within 30 seconds – Big One ahead? The Green Valley fault is not easily visited, but its smaller sibling is—the Cordelia fault. A JPL-developed airborne radar system is conducting an airborne survey of earthquake fault displacements caused by the Aug. 24 magnitude 6.0 quake in Napa Valley, California. While unknown faults are just that, Yolo County and Solano County are ripe with faults that are thought to be inactive. The 2014 Mw 6.0 South Napa earthquake occurred on the West Napa Fault Zone (WNFZ) and caused damage in and around the City of Napa. The West Napa fault extends along the western margin of the basin that underlies much of Napa Valley. While the label does include two reserve level wines (available to wine club) coming in around $75, the remainder of their portfolio ranges between $25-38. The Aug. 24 Napa earthquake, the biggest to hit the region in 25 years, occurred on the West Napa Fault, which is part of a huge fault zone extending outward from the San Andreas Fault. The mapping was done by UAVSAR (uninhabited aerial vehicle synthetic aperture radar). Save my name, email, and website in this browser for the next time I comment. First, to put the South Napa earthquake in context, the West Napa fault, which was the causative fault, is part of the large San Andreas Fault Zone (SAFZ) system. The San Andreas fault is the primary feature of the system and the longest fault in California that can cause powerful earthquakes—as big as magnitude 8. The San Andreas Fault System is an active plate boundary comprising right-lateral strike-slip faults that runs nearly the length of California. Houses on liquefied soil may settle or even move laterally on gentle slopes. Greater Knowledge of Local Faults A major earthquake (6.0 on the Richter scale) struck Napa Valley in late August of 2014, changing the geology of the area, and giving geologists reams of … South of San Francisco, the San Andreas Fault runs directly under Cienega Valley Vineyards’ winery. Not one – but two – mountain ranges flank the Napa Valley, providing protection from wind and weather. The fault running between the cities of Napa and Fairfield is primed for a magnitude-7.1 quake. Mysterious explosions were heard in Brockton, MA, ‘loud explosion’ and ‘sonic boom’ across Nottingham, UK, Ground Shaking, Loud Booms Reported Across Escambia County, Florida. The ground shaking was very strong along the fault and in the Napa Valley. But Within the last two decades, geologists from the California Geological Survey have found more than 50 new surface earthquake faults that have been now placed on a map: Fault map (red lines) of the region around the Napa Valley earthquake, California. Importantly, the extent of the ground deformation in the interferogram shows that the fault slip continues further north than the extent of the rupture mapped at the surface. Sub-AVA: Yountville. The Green Valley fault seems to rupture every thousand years or so (and last ruptured between 1600 and 1800), but there isn't much data. Napa Earthquake Reveals Hidden Fault Lines, Hill Collapses After Landslide Triggered Heavy Rains in Maierato, Calabria (VIDEO), Glowing Northern Lights Engulf Erupting Bardarbunga Volcano, Current seismic swarm in Yellowstone reactivates ancient fault formed after last supervolcano eruption, Shallow M5.0 earthquake hits Turkey and damages homes (video), More than 200 earthquakes follow M5.1 quake near Mina, Nevada, Giant oarfish washes up just before two earthquakes in Taiwan, Major solar flare triggers 3 strong earthquakes in Alaska (M6.3), Argentina (M6.3), Russia (M6.4). The California Geological Survey's interactive map allows users to identify the location and classification of faults throughout California. Diablo, Rodgers Creek, San Andreas, San Gregorio, and West Napa faults. Elevation: 100 feet. Anyone having foretelling election dreams ? The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. 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