This change requires a reload. In the area of North Bend, the fault zone is 4 miles wide and consists of a series of parallel faults. This map is useful in showing the location and approximate length of faults but does not provide the impact an earthquake from a fault could have on the area surrounding. recent movement, sense of movement, slip rate, and continuity of surface Population and housing information extracted from decennial census Public Law 94-171 redistricting summary files for Washington state for years 2000 and 2010. wa, washington, ofm, state, county, city, population, housing, census, 2000, 2010. **, U.S. Department of the Interior | U.S. Geological Survey Quadrangle map shows Seattle fault zone intersecting with southern Whidbey Island fault just north of Fall City. The latest URL: https://pubs.usgs.gov/of/2003/428/ (This version of the report is accessible as defined in You may Save your changes to view them, or Cancel to stay on this page. shown on the map. version of Adobe Acrobat Reader or similar software is required to view it. Most are too small to be felt or cause damage. Over time, fault movement has created some interesting geologic features. USA Earthquake Hazard Map. The primary purpose of this compilation is … This map shows the following faults: Devils Mountain, Utsalady Point, Strawberry Point, Mount Vernon Fault, Little River, Sequim, South… Access Constraints: Bbox East Long-115.58398437501 Bbox North Lat: 49.897666084195 Bbox South Lat Sorry, your blog cannot share posts by email. Published or publicly available data are The Cascadia Subduction Zone, Pacific Northwest Population and housing information extracted from decennial census Public Law 94-171 redistricting summary files for Washington state for years 2000 and 2010. To subscribe via email notifications, you must first sign in. This is a Non-Federal dataset covered by different Terms of Use than Data.gov. Map via USGS. View Full Metadata. 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. 1. Map PDF file Later movement on this long-term active fault zone cut the volcano. O FM controls for annexations occurring between January 1 and April 1 in decennial census years to account for boundary changes related to the timing of the federal census. The text of this report is presented here in Portable Document Format. read more. Earthquakes occur nearly every day in Washington. 552 - Hood Canal fault zone (Class B) 570 - Seattle fault zone 572 - Southern Whidbey Island fault zone 575 - Saddle Mountain faults 581 - Tacoma fault zone. This map shows areas of seismic risk from high (red) to low (grayish-green). The spectacular falls flow over the remains of a newly discovered 20-million-year-old volcano, apparently formed atop the main part of the fault zone as magma rose upward along weak fault planes. You may Update this view or Save a new view to see your changes, or Cancel to stay on this page. For example, the DNR team found evidence that the rocks creating Snoqualmie Falls are much younger than previously thought. faulting or deformation along structures with evidence of Quaternary movement, expression. In the next section we will provide the impact studies conducted on each of the faults in Washington State. (A standard click may automatically open the PDF file inside the browser but doing so will result in a very slow load.) We also combine and publish these data for the entire state. By the time Lewis and Clark arrived on the West Coast in 1805, it had been 105 years since the Cascadia Subduction Zone last ruptured, sending a large portion of the Pacific Ocean roaring toward the coast. The map also shows potentially active faults from a separate 2014 report (click here to download). Geologic maps of 7.5-minute topographic quadrangles covering parts of the Seattle fault and southern Whidbey Island fault zone are available on the DNR website as: Sign-up for DNR enewsletters. Questions or Assistance: USGS Web Contact The map shows faults and folds in the state of Washington that exhibit evidence of Quaternary deformation, and includes data on timing of most recent movement, sense of movement, slip rate, and continuity of surface expression. These sediments were laid down 20,000 to 60,000 years ago, before the last ice age. To subscribe to the Counties Boundary Map dataset via an RSS reader, use one of the following links: Download as RSS Seattle Fault Lines. fault and fold database of the United States. What are the most dangerous fault lines in the USA? map, is available in the “. Arizona Geological Survey (Point of Contact). Washington State Earthquake Hazard Map. Post was not sent - check your email addresses! Mapping along the Snoqualmie River valley also helped answer the important question of where the Seattle fault lies east of its last mapped position near Issaquah. **Large File Warning!! There are many seismically active fault zones across the United States and some still have to be discovered. https://data.wa.gov/Demographics/Counties-Boundary-Map/7x5e-ty7d, https://data.wa.gov/d/7x5e-ty7d?category=Demographics&view_name=Counties-Boundary-Map, http://www.ofm.wa.gov/pop/census2010/default.asp. For the hazard maps, both the fault surface trace and the metadata are simplified representations of the geometry and behavior of the fault, based on geologic interpretation. evidence of Quaternary deformation, and includes data on timing of most Open in External Program. For several years, scientists pondered where this important regional fault zone continues southwestward from its mapped location in the Everett area. Geologists from the Washington Geological Survey map and characterize faults throughout the state every year. A team headed by Joe Dragovich of DNR’s Division of Geology and Earth Resources, assisted by geologists from King County, Pacific Northwest Seismic Network, Colorado College, and Washington State University, has been mapping in this area for the past three years. They’re FREE — CLICK HERE to subscribe. the primary sources of data used to compile this report. The map shows faults and folds in the state of Washington that exhibit City boundaries were fixed as of January 1 for data collection purposes whereas the actual census date is April 1. You have unsaved data that will be lost if you leave this page. Additional fault studies by state and federal geologists in the next few years will help determine the frequency and severity of earthquakes along these fault zones. Please note that federal census population counts for some jurisdictions may differ from the official OFM April 1 population values. USA Earthquake Hazard Map. ), A catalog of referenced data, which includes a variety of geographic, However, it wasn’t until the discovery of the Cascadia Fault in the 1960s th… provide a long-term perspective that augments the short historic records KML (Google Earth-type) files and GIS shape files are also available for download from the site. geologic, and paleoseismic parameters for the faults and folds shown on this (13.34 MB) The Arizona Geological Survey collates and serves geological information for Arizona and other states through its partnership with other state geological surveys. Page Last Modified: Sun Jan 13 00:27 EST 2013, Quaternary Source: United States Geological Survey. of seismicity in many regions. About the Quaternary Faults and the National Seismic Hazard Maps. It is best to download a large PDF file to your hard drive rather than open it inside your browser. EAR TO THE GROUND WITH DNR & COMMISSIONER FRANZ, ‘Tree Link’ helps you answer questions about urban trees. Downloading the PDF file may take several moments but will be worth the wait. Please choose whether or not you wish to save this view before you leave; or choose Cancel to return to the page. The DNR team found that the Seattle fault is intercepted by the southern Whidbey Island fault zone in the vicinity of Fall City. There is an interactive map application to view the faults online and a separate database search function. Didn't find what you're looking for? These fault strands follow the valley edges and control the location of the Snoqualmie River along some portions of the valley. click, This sixteen-page pamphlet describes and discusses data and other information This database was used to create the fault-source characterization in the National Seismic Hazard Maps. The map is from a 2007 report (click here to download) on seismic design categories in Washington. WASHINGTON STATE EARTHQUAKE HAZARD MAPS (In alphabetical order by name) Washington Division of Geology and Earth Resources 9/19/11 Faults running on the Snohomish County-Skagit County line and between Port Townsend and Whidbey Island point toward Vancouver Island. 10mi W of Seattle, WA The Seattle fault is a zone of thrust or reverse faults that strikes through downtown Seattle in Washington State Earthquake Hazard Map. This map shows the primary earthquake faults in the Puget Soundand other less prominent faults. The Seattle Fault Zone is located in the Seattle metropolitan area in the state of Washington in the United States of America. Section 508. Source: United States Geological Survey. OFM substitutes state-certified special census counts in place of federal census counts in decennial census years and takes into account federal corrections to census counts. The primary purpose of this compilation is for use in earthquake-hazard 552 - Hood Canal fault zone (Class B) 570 - Seattle fault zone 572 - Southern Whidbey Island fault zone 575 - Saddle Mountain faults 581 - Tacoma fault zone. Many tribes even left the region permanently. Paleoseismic studies, which evaluate the history of surface Publishing to the public requires approval. Recent geologic mapping by Washington State Department of Natural Resources (DNR) geologists reveals that this major fault zone extends through the Snoqualmie River valley in the vicinity of Carnation, Fall City, and North Bend. evaluations. The approximate location is shown in the embedded Google Map below. The few remaining Native Americans in the area spoke of the earth shaking and ocean rising to consume the land. The team also found that accumulated movement on the fault has uplifted old Snoqualmie River sediments to their current position on ridges, in some places several hundreds of feet above the modern Snoqualmie valley floor. Washington State Department of Natural Resources, Division of Geology and Earth Resources Seattle Fault Peak Ground Acceleration; 7.2-Magnitude Scenario Shake Map Magnitude: 7.2 Depth: 10.0km Epicenter: N47.60 W122.57 Appx. Washington’s fault lines tend to sweep east-west. Here we present a list of the most dangerous fault lines in the USA, those known to have caused terrible damage in the past. For guidance on how to do this, click here. The Geologic Information Portal has a Natural Hazards single-topic map that shows active faults and earthquakes. 7.5-minute quadrangle, Washington, with a section on liquefaction by S. P. Palmer: Washington Division of Geology and Earth Resources Geologic Map GM-44, 1 sheet, scale 1:24,000, with 26 p. text. The zone is shown within the two dashed lines in Figure 1.1. and is composed of four south dipping thrust faults (Johnson et al., 1994). When comparing 2010 values to prior census counts, please note that changes in population and housing, as well as changes in the racial and ethnic composition of the population, may be due to a variety of factors including annexation, natural increase (the excess of births over deaths), and migration. Suggest a dataset here. A strike-slip fault is when two blocks slip past one another, like the San Andreas Fault line.
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