The foundation and structures would not be directly on the fault line as the surface is rupturing, but proximity to an active fault would likely inflict more damage, as it relates to fault rupture, than to homes further away. We want you to know that at HomeGuard Incorporated, we are working to promote safety first to you and your families, and to our employees. One is the West Napa Fault, which stretches 35 miles (57 km) from the city of St. Helena south to San Pablo Bay, according to a USGS report published in 2008. We provide natural hazard reports (also referred to as natural hazard disclosure reports or NHD reports), so you might avoid future surprises ranging from inconvenient to alarming. COMET Director, Tim Wright, from University of Leeds said, “This successful demonstration of Sentinel-1A marks the beginning of a new era for our ability to map earthquakes from space. 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 … State of California. |
Image created by Dr Yngvar Larsen, from the research institute Norut in Norway, and Dr Petar Marinkovic, from PPO.labs in the Netherlands. 4b. The Mw 6.0 South Napa earthquake of August 24, 2014, produced complex and extensive surface faulting and other ground deformation features. The earthquake occurred north of the Bay Area, California, in a part of the fault system which runs down the length of California and includes the San Andreas Fault. As with all fault zones that are active, the new zones require proper disclosure to those seeking to buy property that lies within them. The respirator is stored in between encounters to be put on (‘donned’) again before the next encounter with clients. Previously unmapped earthquake faults ruptured during the Aug. 24 magnitude-6.0 South Napa earthquake, \u0003surprising both scientists and homeowners. You will notice we have enacted policies such as not shaking hands when we meet, less face to face meetings, and wearing protective equipment. HomeGuard Inspectors are to follow The Center for Disease Control and Prevention (CDC) and The National Institute for Occupational Safety and Health, (NIOSH), which have existing guidelines and combinations of recommendations and approaches to conserve respirator supply while safeguarding worker’s health during shortages in pandemic situations. Termite, Home, Roof Inspections, and NHD Reports. Map view of the epicentral area of the 2014 South Napa earthquake. 4a. Despite being a strike-slip earthquake in which most motion is horizontal, the satellite measures mainly vertical and east-west motion and sees the ends of the rupture bulge up (and eastwards) at one end (towards the satellite in the south) and down (and west) at the other. In fact, newly revised earthquake maps have been created for the Napa area as a result of the 2014 South Napa earthquake. Some significant faults in the region are the Calaveras, Concord-Green Valley, Greenville, Hayward, Mt. Figure 1. Among a handful of other possibilities, the Franklin Fault also stands out. A map shows the location of the August 24, 2014 earthquake just south of Napa, California. Scientists predict that within a 30-year period (beginning in 2014), there’s a 51 percent chance that the San Francisco region specifically will experience one or more magnitude-7.0 or greater earthquakes . Sharp lines in the interferogram known as discontinuities, show minor movements on other faults, such as the part of the West Napa Fault system that crosses Napa airport. The images are being used by scientists (such as such as field teams from the University of California Davis) on the ground to help them map the surface rupture. By comparing it with an image acquired on 31 August, it is possible to create a map of the surface deformation caused by the magnitude 6.0 earthquake by looking at the difference in time it takes the signal to reach the satellite. Beyond Gutter Cleaning – What Home Maintenance Tasks Are Best Done in Fall. And you cannot rely on old Natural Hazard Disclosure (NHD) Reports to assess the risk to a property you plan to purchase. We are making every effort to help prevent the spread of the virus and we understand that our employees and company policies play an important part. Many suspects appear on state earthquake maps. The black line denotes the surface rupture mapped in the field by scientists from UC Davis. (bottom) Sentinel-1A interferogram showing the deformation field around the fault. The fault rupture (mapped by UC Davis scientists) resulting from the August 24 earthquake is shown by the black line, south-west of Napa. Many faults zoned in this area were … This interferorgam shows up-down and to a lesser extent east-west motions. The extent of the ground deformation in interferogram shows that the fault slip which occurred in this earthquake continues further north than the extent of the mapped rupture at the surface. 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. The interferogram shows that the southeast-side of the rupture has moved towards the satellite by about 10cm, whilst the northern portion has moved away by 10cm. One is the West Napa Fault, which stretches 35 miles (57 km) from the city of St. Helena south to San Pablo Bay, according to a … This process is now complete, and updated maps have been issued that more accurately accounts for faults in the region. White star denotes the epicenter located by USGS. Greater Knowledge of Local Faults . The mainshock and smaller aftershocks are denoted by the yellow circles. Assuming a continuous fault zone, the West Napa – Franklin Fault zone could be capable of generating a much larger magnitude earthquake than the M 6.0 that occurred on August 24, 2014. The surface fault rupture (mapped in the field by UC Davis scientists) is shown by the white line. This photo is taken at the northern end of the fault rupture, on the West side of Napa. Click here for our detailed COVID-19 inspection policy. Diablo, Rodgers Creek, San Andreas, San Gregorio, and West Napa faults. New state maps show the locations of the West Napa Fault and associated faults in greater detail than ever before in such places as western city of Napa neighborhoods. On the east side of the fault, these motions are in the same direction, either both towards or both away from the satellite, resulting in a large signal. 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.. All inspectors are to use an additional respirator separate from their crawlspace-subarea mask for multiple face-to-face encounters with clients, in a clean environment, (such as) the interior of the home during ( iPad summary/face-to-face ) interactions but removing the respirator (‘doffing’) after each encounter with clients. The epicenter of that earthquake was 20 km (12 mi) NNW of the South Napa epicenter, and also on the West Napa fault system. To limit exposure to the virus, we are asking that only if necessary, direct buyers and their Realtors attend the inspections. M 6.0 - South Napa Many faults zoned in this area were … HomeGuard Incorporated provides home inspections in Novato, Sacramento, and the Bay Area. The Earthquake Event Page application supports most recent browsers, view supported browsers. Whether you are a buyer, a seller, a property developer or simply a concerned homeowner, getting your home inspected and obtaining an up-to-date NHD Report is vital. The interferogram also reveals other portions of the fault system that have moved slightly in this event. When the Sentinel-1 constellation is fully operational (with the launch next year of the identical Sentinel-1B satellite), the average time delay between an earthquake and a radar acquisition will only be a few days. This fault had not been identified as being particularly hazardous prior to the event. Magnitude 6.7 Earthquake on the West Napa Fault ... 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. The contours show the ground motion towards and away from the satellite. 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