Images

Relative explosiveness and resulting height of eruption columns typically associated with different styles of eruption

Minor ashfall on hay field, Augustine eruption, Homer area, Alaska, 1986.

Trace of Augustine ash on car hood, Homer, Alaska, January 2006.

White Salmon River (Washington) at USGS gauge site, 2.3 km downstream of Condit Dam, looking downstream: (a) 53 min before breaching; (b) 20 min after breaching, at discharge peak; (c) 76 min after breaching, at peak sediment concentration, with high water line evident; (d) ~2.5 h after breaching, discharge has returned to background and sediment concentration is f

Lahar devastation after the eruption of Mount Pinatubo, Philippines.

Hood to protect air intake from ashfall for GenSet equipment in Bariloche, Argentina, following 2011-2012 eruption of Cordon Caulle volcano, Chile.

Field-trip guide to Columbia River flood basalts, associated rhyolites, and diverse post-plume volcanism in eastern Oregon available at https://pubs.er.usgs.gov/publication/sir20175022O.

Panoramic image of Belacázar Village eight years after the 2008 lahar innundation. Lahar deposits in the foreground of the town are now soccer fields and a dirt bike track.

For Volcano Preparedness Month in Washington State, Carolyn Driedger (USGS-Cascades Volcano Observatory) and Zane Gibson (Fire Chief, Orting Valley Fire and Rescue) share the story of their visit to Colombia's Nevado del Ruiz volcano and valuable lessons learned for resident near Mount Rainier.

Map showing locations of airports impacted by volcanic activity. From 1980 through 2006, an average of five airports per year have been affected by volcanic activity

Mount Rainier 2014 Teacher Workshop

Flow chart illustrating the many variables influencing ash-induced insulator flashover.

Streamflow measurement and water sampling at Paradise Creek are part of the regular measurements taken during hydrothermal monitoring campaigns at Mount Rainier, Washington.

Village of Belalcázar along the Páez River in Colombia. Photograph taken in 2006 - note river bank vegetation and soccer pitch is restored in 12 years after 1994 lahar.

Scientists monitor data in the California Volcano Observatory operations room, Menlo Park, California.

Graph shows thickness of ash (and larger-sized particles within 20-40 km) that fell to the ground downwind of Mount St. Helens during the eruption on May 18, 1980. The volcano ejected a minimum of 1.1 km3 of uncompacted tephra, which is equivalent to 0.20-0.25 km3 of magma or solid rock.

Heavy ashfall (20-30 mm) from Tungurahua, Ecuador, 2006.

Dusting of Klyuchevskoy ash on camera bag, 2006.

Surveyor Frank Dodge's 1894 cross-section of Halema‘uma‘u overlaid on his 1892 cross-section. The 1892 lava lake was measured at 73 m (240 ft) below the rim of Halema‘uma‘u pit and by early-1894, the lava lake had filled the pit and frequently overflowed onto the caldera floor.

Photograph taken on March 20, 1894 looking up at the Halemaʻumaʻu lava lake perched atop a low dome on the floor of Kaluapele (Kīlauea caldera).

The painting by Jules Tavernier, depicting the 1880-81 lava flow from Mauna Loa as it enters a stream near Hilo, Hawaii on July 20, 1881, provided courtesy of the National Park Service, Hawaii Volcanoes National Park (catalog number HAVO 806).