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The Cascadia subduction zone is a 960 km (600 mi) fault at a convergent plate boundary, about 100–200 km (70–100 mi) off the Pacific coast, that stretches from northern Vancouver Island in Canada to Northern California in the United States
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]
The network is also affiliated with the University of Oregon Department of Geology. [6] It is the second largest of the regional seismic networks in the ANSS (Advanced National Seismic System) and has produced more data than the networks in the states of Alaska, Utah, Nevada, Hawaii and the New Madrid, Missouri-Tennessee-Kentucky-Arkansas area.
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 ...
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.
An earthquake ruptured off California on Thursday morning, briefly triggering a tsunami warning for the coast of Northern California and southern Oregon. The earthquake, a magnitude-7.0 temblor ...
Map Baker County: 001: Baker City: 1862: Eastern portion of Wasco County: Named in honor of Edward Dickinson Baker, who died in combat while serving as Oregon senator. 16,912: 3,068 sq mi (7,946 km 2) Benton County: 003: Corvallis: 1847: Polk County: Named for Thomas Hart Benton, senator and advocate of U.S. annexation of the Oregon Country ...
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 ...