| 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. This earthquake is the biggest to hit the San Francisco Bay Area since the Mw 6.9 Loma Prieta earthquake in1989. Previously unmapped earthquake faults ruptured during the Aug. 24 magnitude-6.0 South Napa earthquake, \u0003surprising both scientists and homeowners. When was the last major earthquake on the Main Kopeh Dagh Fault in Turkmenistan? The risk varies depending on your location. Home Inspections and Hazard Assessments in the Bay Area. | Sharp lines in the interferogram show minor movements on other faults, such as the part of the West Napa Fault system that crosses Napa airport. The bad news: There is likely far more shake potential in the Napa Valley than was previously attributed to the faulting there. A qualified home inspector can assess the state of your designated property. Photo credit: Austin Elliott, UC Davis. The dashed line denotes the regions shown in the other figures. These and several other major faults in the region are part of the San Andreas fault system and can cause damaging earthquakes, like the 1989 Loma Prieta earthquake. However on the western side of the fault, the east-west and vertical motions are in the opposite sense, cancelling each other out and explaining the asymmetry seen in the deformation pattern across the fault. Click here for our detailed COVID-19 inspection policy. 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. Earthquake locations and existing fault locations (red lines) are sourced from the USGS. 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. The epicenter of that earthquake was 20 km (12 mi) NNW of the South Napa epicenter, and also on the West Napa fault system. This fault had not been identified as being particularly hazardous prior to the event. These crucial maps contain multiple new earthquake fault zones. The agency has begun to officially map and zone this section of the West Napa fault, which could restrict or limit future construction in the areas where scientists pinpoint the fault. location = 'https://homeguard.com/thank-you-sidebar/'; 4a. In fact, newly revised earthquake maps have been created for the Napa area as a result of the 2014 South Napa earthquake. 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. A map shows the location of the August 24, 2014 earthquake just south of Napa, California. Ultimately, this enables you to exist in your home with the peace of mind you deserve. (right) The same interferogram processed to show the total motion towards and away from the satellite. Termite, Home, Roof Inspections, and NHD Reports. The fault rupture (mapped by UC Davis scientists) resulting from the August 24 earthquake is shown by the black line, south-west of Napa. Since then, they have been using the data to update the area’s fault zone maps. Knowledge is power, and this information is critical for anticipating the risks you need to account for when living in or managing California properties. Parts of the West Napa Fault Zone ruptured during the Aug. 24, 2014 South Napa earthquake, they said. 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. The mainshock and smaller aftershocks are denoted by the yellow circles. We ask all parties who are not feeling well to stay home and not attend the inspections. During this time we are asking our employees to be extra diligent with safety measures, to not work if they are feeling ill in any way, and to self-quarantine, if they or any of their family members have been exposed to COVID-19. You will notice we have enacted policies such as not shaking hands when we meet, less face to face meetings, and wearing protective equipment. Parts of the West Napa Fault Zone ruptured during the Aug. 24, 2014 South Napa earthquake, they said. 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. Copyright: Copernicus data (2014)/ESA/PPO.labs-Norut–COMET-SEOM Insarap study. In Northern California, the nine Bay Area counties are more prone to shaking than in the Sacramento area, but earthquakes are a fact of life statewide and could have an impact on your choice of property. The San Andreas Fault and many other Northern California fault zones are running north-south: Rodgers Creek fault zone, Maacama fault zone, Alexander-Redwood Hill fault , Hunting Creek-Berryessa fault zone, and West Napa fault zone. Some significant faults in the region are the Calaveras, Concord-Green Valley, Greenville, Hayward, Mt. The mainshock and smaller aftershocks are denoted by the yellow circles. The interferogram was created by COMET collaborators Dr Yngvar Larsen, from the research institute Norut in Norway, and Dr Petar Marinkovic, from PPO.labs in the Netherlands. 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. Existing fault maps show that the Franklin Fault extends southward to the Calaveras Fault zone and the West Napa Fault extends north of the seismic array. 4b. After significant earthquake events, State Earthquake Fault Zone maps are usually updated. 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 … Many suspects appear on state earthquake maps. EFZ is shown as the yellow polygon. The inhabitants of such a home would certainly feel a significant quake. 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. 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. 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. The interferogram also reveals other portions of the fault system that have moved slightly in this event. State of California. The spread of the virus has us all on high alert, but if we all work together then we can keep everyone safe. Earthquakes without Frontiers is supported by the Natural Evironment Research Council (, New satellite maps out Napa Valley earthquake, field teams from the University of California Davis. The pre-earthquake image was acquired on that day. Many faults zoned in this area were … 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. Figure 1. The Earthquake Event Page application supports most recent browsers, view supported browsers. Copyright: Copernicus data (2014)/ESA/PPO.labs-Norut–COMET-SEOM Insarap study. The rapidly populating coastal region from the Gulf to Pakistan faces a huge tsunami risk, Active faulting and great earthquakes – field work in Turkmenistan, The 2016 field work campaign on the Dzhungarian Fault. If the owner or occupant of the house is not feeling well, is elderly or at-risk, or has been exposed to the virus, please call us and we will reschedule the inspections to a time when the occupant will not be disturbed and the structure can be safely entered. Sentinel-1A interferogram of the ground deformation due to the August 24th earthquake, Napa, California. This is the default - view for recent EFZ maps, available as downloadable files in Portable Document Format (pdf). At least one good thing will come of the recent South Napa Earthquake that shook the wine country on August 24: It will lead to much better maps of active faulting in that area. 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. Many suspects appear on state earthquake maps. As with all fault zones that are active, the new zones require proper disclosure to those seeking to buy property that lies within them. This process is now complete, and updated maps have been issued that more accurately accounts for faults in the region. The Words We Use Can Make A Difference, Why You Need a Home Inspection Before You Buy Real Estate, Tips for Negotiating Repairs after Your Temecula Home Inspections. Map view of the epicentral area of the 2014 South Napa earthquake. Fault damage in the suburbs west of Napa, California from the August 24th magnitude 6 earthquake. The only other noteworthy earthquake in the Napa area in the recent past (since 1973) was the M4.9 Yountville earthquake on September 3, 2000. A right lateral strike-slip fault of the August 24th magnitude 6 earthquake Calaveras Concord-Green. Moved slightly in this event triangles represent the surface rupture offset kerb stones the. 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