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  2. Portland Hills Fault - Wikipedia

    en.wikipedia.org/wiki/Portland_Hills_Fault

    Portland Hills Fault using data from USGS and OpenStreetMap. Made using QGIS. The Portland Hills fault zone is the largest shallow fault that cuts beneath Portland, Oregon. [1] It stretches from Oregon City to Scappoose, and has a zone of deformation that extends at least 1,300 feet (400 m). [2]

  3. List of cities in Oregon - Wikipedia

    en.wikipedia.org/wiki/List_of_cities_in_Oregon

    Map of the United States with Oregon highlighted. Oregon is a state located in the Western United States. All population data is based on the 2020 census and 2010 census and the Census Bureau's annual estimates. [1] All area data is based on the 2010 US Gazetteer files. There are 241 municipalities.

  4. Cascadia subduction zone - Wikipedia

    en.wikipedia.org/wiki/Cascadia_subduction_zone

    In 2004, a study conducted by the Geological Society of America analyzed the potential for land subsidence along the Cascadia subduction zone. It postulated that several towns and cities on the west coast of Vancouver Island, such as Tofino and Ucluelet, are at risk for a sudden, earthquake initiated, 1–2 m subsidence. [23]

  5. Portland, Oregon - Wikipedia

    en.wikipedia.org/wiki/Portland,_Oregon

    Portland (/ ˈ p ɔːr t l ə n d / PORT-lənd) is the most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette and Columbia rivers, it is the county seat of Multnomah County, Oregon's most populous county.

  6. Researchers gain clearest picture yet of fault that threatens ...

    www.aol.com/news/big-one-researchers-gain...

    To map the subduction zone, researchers at sea performed active source seismic imaging, a technique that sends sound to the ocean floor and then processes the echoes that return. The method is ...

  7. Oregon City, California - Wikipedia

    en.wikipedia.org/wiki/Oregon_City,_California

    Oregon City, formerly Bloomingdale and Hengy, [3] is a ghost town located between Oroville and Cherokee in Butte County, California. One of the first mining camps in the county, it was established in the autumn of 1848 by a party of Oregonians , [ 4 ] who came to California over the Applegate and Lassen trails.

  8. 1993 Scotts Mills earthquake - Wikipedia

    en.wikipedia.org/wiki/1993_Scotts_Mills_earthquake

    The 1993 Scotts Mills earthquake, also known as the "Spring break quake", occurred in the U.S. state of Oregon on March 25 at 5:34 AM Pacific Standard Time. With a moment magnitude of 5.6 and a maximum perceived intensity of VII ( Very strong ) on the Mercalli intensity scale , it was the largest earthquake in the Pacific Northwest since the ...

  9. Kelly Butte Natural Area - Wikipedia

    en.wikipedia.org/wiki/Kelly_Butte_Natural_Area

    Kelly Butte Natural Area is a city park of about 23 acres (9.3 ha) in southeast Portland in the U.S. state of Oregon, just east of Interstate 205. The park is named after pioneer Clinton Kelly, who settled the area east of the Willamette River in 1848. [ 2 ]