New field guides provide insight into western volcanic regions.
In preparation for the August 2017 IAVCEI international scientific assembly in Portland, Oregon, researchers have been working on field guides that interpret the dynamic volcanic landscapes of North American Cordillera
, which is home to a greater diversity of volcanic provinces than any comparably sized region in the world. The guides will be used during field trips surrounding the conference and provide field-based scientific explanation of volcanic processes and hazards to anyone who uses them.
- Field-trip guide for exploring pyroclastic density current deposits from the May 18, 1980, eruption of Mount St. Helens, Washington
- Emplacement of Holocene silicic lava flows and domes at Newberry, South Sister, and Medicine Lake volcanoes, California and Oregon
Field-trip guide to Mount Hood, Oregon, highlighting eruptive history and hazards
- Field-trip guide to the vents, dikes, stratigraphy, and structure of the Columbia River Basalt Group, eastern Oregon and southeastern Washington
Field-trip guide to subaqueous volcaniclastic facies in the Ancestral Cascades arc in southern Washington State—The Ohanapecosh Formation and Wildcat Creek beds
Volcanic Unrest is Persistent in Alaska and HawaiiThe Alaska Volcano Observatory website includes complete information about volcanoes in Alaska.
The Hawaiian Volcano Observatory website offers information about volcanoes in Hawaii.
Mount Cleveland, located in the central Aleutian Islands, has been in a state of volcanic unrest since June 17, 2015. Explosive eruptions can send ash to altitudes hazardous to aviation.
- Bogoslof volcano, located in the central Aleutian Islands, is in a state of elevated unrest since eruptions began December 12, 2016. Eruptive activity is dominated by explosions that can put volcanic ash to altitudes exceeding 30,000 feet, resulting in ash cloud hazards to aviation.
Kīlauea Volcano on the Island of Hawai‘i has been erupting from its East Rift Zone nearly continuously since 1983. Lava flowing into the Pacific Ocean presentsocean entry hazards to visitors. A second eruption began at the summit of Kīlauea in 2008 where an active lava lake produces occasional explosions and gas emissions that create Statewide vog hazards.
Mauna Loa Volcano on the Island of Hawai‘i began showing signs of unrest in 2014, and the volcano alert level and aviation color code were raised on September 17, 2015. Elevated rates of earthquakes and ground deformation persist and HVO continues to monitor the volcano closely.