Don't knowingly lie about anyone Fault zones in green are projected to move by less than 2 inches during that time. For example, a new house might be allowed to be constructed 50 feet from the fault line. A collection of spaceship-like tripods popped up around Napa in the middle of October and left just as quickly as they came. “We didn’t know whether they were active or not at the time. Email notifications are only sent once a day, and only if there are new matching items. “Prior to the earthquake, a lot of these faults were not recognized,” Dawson said. Existing fault maps show that the Franklin Fault extends at least 15 km southward to the Calaveras Fault zone and the West Napa Fault extends at least 25 km north of our array 1. Be Truthful. Please avoid obscene, vulgar, lewd, The earthquake fault zone line in the city of Napa runs through Browns Valley, where it splits into various directions and just misses Browns Valley Elementary School. There is an interactive map application to view the faults online and a separate database search function. One trace on the far west side appears to extend about six miles beyond what was mapped prior to the quake. North Bay Area Fault Map The Northern California Area is woven by a series of major faults from the meeting of the huge Pacific and North American plates. The West Napa Fault is a 57 km (35 mi) long geologic fault in Napa County, in the North Bay region of the San Francisco Bay Area in northern California.It is believed to be the northern extension of the Calaveras Fault in the East Bay region.. A line also runs under the west side of American Canyon, with the main part of the city not visible in the new map. Fault map (red lines) of the region around the Napa Valley earthquake, California. As the 2014 South Napa Earthquake fades into memory, scientists warn that all parts of Napa County remain vulnerable to future quakes. This practice dates back to the Alquist-Priolo Earthquake Fault Zoning Act of 1972, passed by the state in the wake of the 1971 San Fernando earthquake. Keep it Clean. racist or sexually-oriented language. {{start_at_rate}} {{format_dollars}} {{start_price}} {{format_cents}} {{term}}, {{promotional_format_dollars}}{{promotional_price}}{{promotional_format_cents}} {{term}}, www.conservation.ca.gov/cgs/shzp/Pages/SHPMaps.aspx, USGS wants to know why South Napa quake shook Napa so hard, Researchers detail Napa earthquake's patterns, and lessons, Council vote on Napa Oaks II homes delayed after release of new quake maps, 1906 film of San Francisco after quake found at flea market, A big quake on the Hayward fault would give Napa a good shaking, On the fourth anniversary of Napa's quake, courthouse renovation in high gear, Website shows where Napa County disasters might strike, The 2014 quake does not exempt Napa from another one, Watch Now: Inside the Bowl: a look at a south Napa homeless camp, On the Napa River Trail with Carol and Gail, Napa Library reopens following coronavirus pandemic closure, Video: Evil Vines Cemetery returns to Napa for Halloween. Map of Napa Valley region faults. ... West Napa: Concord/Green Valley: Greenville: Mount Diablo (thrust fault) Northern San Gregorio: Monte Vista (thrust fault) that is degrading to another person. You can cancel at any time. You don’t want the fault to move under the building and damage the building or foundation.”. PLEASE TURN OFF YOUR CAPS LOCK. It calls for having geological setback zones and in some cases strengthened foundations. The West Napa Fault is the nearest known active fault, located approximately 3 kilometers west of the site. Sunday's 6.0 magnitude earthquake in Napa, California, was a jolt from the blue, involving previously unknown active fault lines as well as faults that were thought to be inactive. KML (Google Earth-type) files and GIS shape files are also available for download from the site. We acquired seismic reflection, refraction, and guided-wave data along a 117-m-long profile across the known surface rupture zone of the West Napa Fault zone. person will not be tolerated. If your home, driveway or pool were damaged in the South Napa earthquake, should you make repairs immediately – or wait until the local fault …, New state maps of Napa’s seismic fault zones have led the city to push back an expected vote on a controversial, long-planned housing developm…, SAN FRANCISCO — More than a century after San Francisco’s deadly 1906 earthquake, a film reel with nine minutes of footage capturing the city …, A killer quake along one of the Bay Area’s most dangerous, most active faults – some scientists call it a “tectonic time bomb”—is forecast to …, Napa County is nearing yet another milestone in a long recovery from the Aug. 24, 2014 South Napa earthquake as its cracked-up courthouse make…. Get an email notification whenever someone contributes to the discussion. Enter Let It Glow photo contest to win $250! Select a fault by clicking on the map or on one of the buttons below. “In general, under state law, most single family homes are grandfathered in,” Dawson said. While often represented as a single line it is more like a system of joinery with numerous parallel cracks and fractures such as the Maacama, Rodgers Creek, Green Valley and West Napa faults. It has been mapped as a Late Pleistocene-Holocene active fault, and is considered to be predominantly a right lateral strike-slip fault. Geologic Setting West of the San Andreas Fault . We'd love to hear eyewitness Notifications from this discussion will be disabled. Archived report (descriptions no longer maintained) West Napa fault, Browns Valley section (Class A) No. (Image credit: USGS) Why it happened. Don't Threaten. “They (homeowners) won’t need to do any investigations. faults are shown in relation to the project site on the attached Active Fault Map, Figure 4. The West Napa Fault was most recently active in August 2014 and generated a magnitude 6.0 earthquake. Roll your mouse over the faults to view the fault names on the map. Doing geological studies won’t help them avoid surface ruptures. Find local businesses, view maps and get driving directions in Google Maps. A major feature is the West Napa Fault responsible for the Aug. 24, 2014 South Napa earthquake. Historic Fault Activity – Numerous earthquakes have occurred in the region within historic times. Barry Eberling covers Napa County government, transportation, the environment and general assignments. But any place in California where there are earthquakes, retrofits are always a good thing.”. then {{format_dollars}}{{start_price}}{{format_cents}} per month. When you have eliminated the JavaScript , whatever remains must be an empty page. No racism, sexism or any sort of -ism Diablo, Rodgers Creek, San Andreas, San Gregorio, and West Napa faults. Be Nice. West Napa Fault Chico San Francisco ± 0 5 10 20 30 40 Miles Location Map Estimated Injuries and Fatalities at 2am, for This Scenario:11,040 San Francisco Sacramento Eureka. Preliminary mapping of side-slip at the surface reveals a fault in the Brown's Valley Section of the West Napa Fault Zone that extends well beyond what was known. An online map of United States Quaternary faults (faults that have been active in the last 1.6 million years) is available via the Quaternary Fault and Fold Database. Earthquakes, floods and fires – there’s apparently no safe haven from all of these potential disasters in Napa County. We’ve added a lot of these faults that ruptured during the 2014 earthquake.”. The fault is situated at the east of West Napa Fault and extends from Mount Diablo to the Carquinez Strait, an approximately 11 mile long distance. New Napa County quake maps show more exact locations of faults. 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