Map of Axial Seamount and instrument locations
For volcanoes at submarine rift zones, a direct link between seismicity, seafloor deformation and magma intrusion has not been demonstrated. Recordings from ocean-bottom hydrophones and bottom-pressur...
Gallery: The fleeting beauty of caves made from ice and snow
Explorer Brent McGregor shares stunning photographs of glacier caves discovered within the Sandy Glacier on Oregon's Mount Hood.
Crater Lake
Crater Lake is a caldera lake in the western United States, located in south-central Oregon. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity...
Mount Hood
Mount Hood, called Wy'east by the now-extinct Multnomah tribe, is a stratovolcano in the Cascade Volcanic Arc of northern Oregon. It was formed by a subduction zone on the Pacific coast and rests in t...
Map of Axial Seamount and instrument locations
For volcanoes at submarine rift zones, a direct link between seismicity, seafloor deformation and magma intrusion has not been demonstrated. Recordings from ocean-bottom hydrophones and bottom-pressur...
Gallery: The fleeting beauty of caves made from ice and snow
Explorer Brent McGregor shares stunning photographs of glacier caves discovered within the Sandy Glacier on Oregon's Mount Hood.
Sawtooth Mountain
Sawtooth Mountain is a shield volcano, and part of the polygenetic Indian Heaven Volcanic Field in Washington, United States. It is located midway between Mount St. Helens and Mount Adams, and dates f...
Battle Ax
Battle Ax is a shield volcano in the Cascade Range of Oregon. The shield is mostly made of andesite.The summit is in the Bull of the Woods Wilderness and can be reached by the Battle Ax Mountain trail...
Mount Talbert
Mount Talbert is an volcanic cinder cone in Clackamas County, Oregon. It is part of the Boring Lava Field, a zone of ancient volcanic activity in the area around Portland. Its summit rises to an eleva...
Crater Lake (Colorado)
Crater Lake is a mountain lake in the Elk Mountains, Pitkin County of the US State of Colorado. It lies just northeast of the Maroon Bells and just northwest of Pyramid Peak. The view of the striated ...
Big Hole (Oregon)
Big Hole is a large maar (explosion crater) in the Fort Rock Basin of Lake County, central Oregon, northeast of Crater Lake, near Oregon Route 31. It is approximately 6000 ft (1820 m) across and...
Pilot Butte (Oregon)
Pilot Butte is an extinct volcano located in Bend, Oregon. It is a cinder cone butte which rises nearly 500 feet (150 m) above the surrounding plains. Bend is one of four cities in the United S...
Zigzag Glacier
Zigzag Glacier is an alpine glacier located on the upper southwest slopes of Mount Hood in the U.S. state of Oregon. It ranges in elevation from 10,200 to 7,200 feet (3,100 to 2,200 m) with finge...
Larch Mountain (Multnomah County, Oregon)
Larch Mountain is an extinct volcano near Portland, Oregon. The name is misleading, as no western larch (a large deciduous, coniferous tree) can be found there. It received that name when early lumber...
Ladd Glacier
Ladd Glacier is an alpine glacier on the north slope of Mount Hood in the U.S. state of Oregon. It lies at an average elevation of 7,500 feet (2,300 m). The glacier lies entirely within Mount Ho...
Axial Seamount
Axial Seamount (also Coaxial Seamount or Axial Volcano) is a seamount and submarine volcano located on the Juan de Fuca Ridge, approximately 480 km (298 mi) west of Cannon Beach, Oregon. Sta...
Mount McLoughlin
Mount McLoughlin is a steep-sided lava cone built on top of a shield volcano in the Cascade Range of southern Oregon and within the Sky Lakes Wilderness. It is one of the volcanic peaks in the Cascade...
Little Zigzag River
The Little Zigzag River is a tributary, about 5 miles (8.0 km) long, of the Zigzag River in the U.S. state of Oregon. The Zigzag and Little Zigzag drain the Zigzag Glacier on Mount Hood, a high v...
Mahogany Mountain
Mahogany Mountain is an ancient caldera volcano on the border of Oregon and Idaho, in Malheur County and Owyhee County, respectively. While its early history is largely unknown, its last eruption was ...
Diamond Craters
Diamond Craters is a volcanic field or small shield volcanoin southeastern Oregon, about 40 miles (64 km) southeast of the town of Burns. It consists of a 23 sq mi (60 km) area of...
Three Fingered Jack
Three Fingered Jack, named for its distinctive shape, is a Pleistocene volcano in the Cascade Range of Oregon. It is a deeply glaciated shield volcano and consists mainly of basaltic andesite lava. Co...
Mount Sylvania
Mount Sylvania is an extinct volcano, part of the Boring Lava Field, on the outskirts of Portland, Oregon. Parts of the mountain are within the cities of Portland, Lake Oswego, and Tigard. Mountain Pa...
Brown Mountain (Klamath County, Oregon)
Brown Mountain is a small cinder cone on top of a shield volcano located in Cascade Volcanic Arc in Klamath and Jackson counties, Oregon. Most of the mountain, including its peak, is in western Klamat...
Cascade Volcanoes
The Cascade Volcanoes (also known as the Cascade Volcanic Arc or the Cascade Arc) are a number of volcanoes in a volcanic arc in western North America, extending from southwestern British Columbia thr...
Black Crater
Black Crater is a steep-sided shield volcano in the Cascade Range of central Oregon, located north of the Three Sisters and east of McKenzie Pass. Ice Age glaciers carved a large cirque into the nort...
Davis Lake volcanic field
The Davis Lake volcanic field, is a volcanic field with a group of andesitic cinder cones, lava flows and basaltic andesite shield volcanos east of the Cascade Range of Oregon, USA.
Jordan Craters
The flows of Jordan Craters volcanic field are the youngest of a large Quaternary basalt fields in the eastern part of the U.S. state of Oregon. The most recent flows come from Coffeepot Crater, a lar...
Pelican Butte
Pelican Butte is a steep-sided dormant shield volcano in the Cascade Range of southern Oregon. It is located 28 miles (45 km) due south of Crater Lake and 12 miles (19 km) northeast of Moun...