Termite, Home, Roof Inspections, and NHD Reports. This fault had not been identified as being particularly hazardous prior to the event. Menu Contact Search 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 … South of the town of Napa, the ground has moved towards the satellite by up to 10 cm (red colours), whereas to the north it has moved away by 10 cm (blue colors). These crucial maps contain multiple new earthquake fault zones. Sitemap Corporate Office: 510 Madera Ave San Jose, CA 95112 Many faults zoned in this area were … The fault rupture ran through homes and across roads, buckling the tarmac surface and pavements, resulting in damage expected to cost hundreds of millions of dollars. Skip to Main Content. 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. This earthquake is the biggest to hit the San Francisco Bay Area since the Mw 6.9 Loma Prieta earthquake in1989, although this most recent earthquake was many times smaller. The interferogram clearly confirms that the West Napa Fault was responsible for the earthquake. This will enable COMET & EwF researchers to analyse the surface deformation more quickly following earthquakes. 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. If the occupant is home, please remind them to keep the social distancing standard with the inspectors. 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. 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. Among a handful of other possibilities, the Franklin Fault also stands out. Click here for our detailed COVID-19 inspection policy. The contours show the ground motion towards and away from the satellite. 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. 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. 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. The pre-earthquake image was acquired on that day. The risk varies depending on your location. Map view of the epicentral area of the 2014 South Napa earthquake. (a) All strong motion stations and the GCMT focal solution (beach ball). Scientists have used a new Earth-observation satellite called Sentinel-1A to map the ground movements caused by the earthquake that shook up California's wine-producing Napa Valley on 24 August 2014. The mainshock and smaller aftershocks are denoted by the yellow circles. 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. This process is now complete, and updated maps have been issued that more accurately accounts for faults in the region. New homes cannot be constructed on a fault line, but generally they may be built 50 feet or more away from one. The respirator is stored in between encounters to be put on (‘donned’) again before the next encounter with clients. When the Sentinel-1 constellation is fully operational, the average time delay between an earthquake and a radar acquisition will only be a few days, which will mean the results will also be useful for helping with humanitarian responses on the ground. (top) Satellite image of Napa County Airport, five miles south of Napa (GoogleEarth) and the southern extent of the mapped surface rupture (shown in white, UC Davis). The Earthquake Event Page application supports most recent browsers, view supported browsers. EFZ is shown as the yellow polygon. The black line denotes the surface rupture mapped in the field by scientists from UC Davis. Whilst most of the motion in a strike-slip earthquake is horizontal in the direction of the fault, the ground motion at the end of these fault ruptures is a combination of fault perpendicular and vertical. This interferorgam shows up-down and to a lesser extent east-west motions. Knowledge is power, and this information is critical for anticipating the risks you need to account for when living in or managing California properties. Or, try our Real-time Notifications, Feeds, and Web Services . When the South Napa Fault ruptured last summer and shook the historic city of Napa, the earthquake hit the oldest buildings with the heaviest damage, a new review by seismologists reveals. 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 … The interferogram of the rupture clearly confirms that part of the West Napa Fault system was responsible for the earthquake (BBC News Article on the satellite interferogram and earthquake). 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. The earthquake is the largest to strike the Napa … Beyond Gutter Cleaning – What Home Maintenance Tasks Are Best Done in Fall. 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. Call us at today at 855-331-1900, or feel free to use our online contact form to get a free quote. Earthquake Fault Zone(EFZ) map on the Hollywood Faul t from the Hollywood 7.5minute Quadrangle. Copyright: Copernicus data (2014)/ESA/PPO.labs-Norut–COMET-SEOM Insarap study. Earthquake locations and existing fault locations sourced from USGS. 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. The Mw 6.0 South Napa earthquake of August 24, 2014, produced complex and extensive surface faulting and other ground deformation features. The surface fault rupture (mapped in the field by UC Davis scientists) is shown by the white line. 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