The Dynamic Earth View Multimedia Version

Main Menu >  Plate Tectonics and Volcanoes  >  Juan de Fuca Ridge
TITLE: Juan de Fuca Ridge

[Photo: Juan de Fuca Ridge]

Just 400 km (250 mi) off the coast of Oregon and Washington, the Juan de Fuca Ridge is spreading at a rate of 6 cm (2.4 in) per year more than twice as fast as the Mid-Atlantic Ridge. At the ridge crest, two plates slowly move apart. The eastward-moving plate descends beneath the North American Plate in the Pacific Northwest, triggering volcanic eruptions in the Cascade Range and occasional large earthquakes.


Bottom Navigation Bar


Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits