![]() ![]() Pacific Northwest that can lead to ineffective preparedness measures. This translates into major uncertainties in earthquake hazard assessments of the U.S. This area in the Pacific Northwest is a region of significant seismic hazards, and much is unknown about the potential size and magnitude of earthquake ruptures and the effects of earthquake shaking. The term Cascadia encompasses the volcanoes of the Cascade Range and the subduction zone that feeds them. This map is a tool for visualizing and interpreting the physiography of Cascadia. Where and how these people live, work, and play are influenced by the shape, or physiography, of Cascadia. The region is home to nearly 10 million people. Visit Media to see details.Ĭascadia encompasses the volcanoes of the Cascade Range and the subduction zone that feeds them. The focus areas for mapping are strategically chosen based on the overall project objectives but also in consultation with other USGS researchers, universities, State and local agencies, and others. Most mapping is conducted at the 7.5' quadrangle scale but in many instances these maps are compiled into regional compilations such as the Portland basin map. The primary focus of this project is geologic mapping. Geologic mapping and research supports resource assessments, the understanding of natural hazards, the delineation of ecosystems, and defines the framework geology of this unique region. Consequently, this area with urban centers and transportation networks is subject to earthquakes, volcanic activity, landslides, and floods. These volcanoes rest above the active Cascadia subduction zone, which is the boundary where the oceanic tectonic plate dives beneath the continental plate. ![]() in Washington, Oregon, and northern California. On its path to the Pacific Ocean, the Columbia River slices through a chain of active volcanoes located along the western margin of the U.S. Accessed July 9, 2021.The Pacific Northwest is an area created by active and complex geological processes. The Washington Post (2021, July 9) Capital Weather Gang: Severe heat wave builds across Western U.S.Prince George Citizen (2021, July 6) Prince George under special air quality statement due to nearby wildfires.Oregon Department of Environmental Quality (2021, July 8) Air quality advisory for south central Oregon.National Interagency Fire Center (2021, July 1) National Significant Wildland Fire Potential Outlook.Interagency Wildland Fire Air Quality Response Program (2021, July 9) Smoke Outlook.Government of Canada (2021, July 9) Alerts for: 100 Mile.Wildfire Service says risk is high to extreme. CBC (2021, July 8) More than 200 wildfires burning as B.C.BC Wildfire Service (2021, July 5) Wildfire Seasonal Outlook.BC Wildfire Service (2021, July 8) Wildfires of Note.NASA Earth Observatory image by Lauren Daupin, using MODIS data from NASA EOSDIS LANCE and GIBS/Worldview. A heatwave building in Southern California, as well as very dry conditions, have elevated the fire danger in a state that already has six large active fires. The grim outlook, however, is not limited to the northwest. Looking ahead, fire potential remains high in many parts of the northwest, as higher-than-normal temperatures and lower-than-usual rainfall are forecasted for July. On July 8, the Oregon Department of Environmental Quality issued an air quality advisory for Klamath and Lake counties. But at night the smoke is settling into basins and valleys in south-central Oregon. Again, much of the smoke is aloft and dispersing toward the northeast and east. In Oregon, the Bootleg fire has burned almost 160 square kilometers (60 square miles) since July 6. In Prince George, the air quality health risk was “high,” meaning the general population should reduce or reschedule strenuous activities outdoors. Much of the smoke is aloft, but it is also affecting ground-level air quality in the communities of central British Columbia. In British Columbia, the Cutoff Creek fire has burned more than 60 square kilometers (20 square miles) since its discovery on July 2. Smoke from some of the fires is visible in this natural-color image, acquired on July 8, 2021, with the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. In the United States, nearly 20 large fires were burning in Washington, Idaho, and Oregon. By July 8, that number climbed to more than 200 active fires across the Canadian province, of which 15 were considered “wildfires of note” (especially large fires, or fires that threaten public safety). The extraordinary heatwave that scorched the Pacific Northwest in June 2021 has diminished, but substantial fires continued to burn across the region in July.Įxacerbated by extreme heat and wind, more than 40 fires started burning across British Columbia in late June. ![]()
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