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Images related to natural hazards.
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.
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.
Heavy ashfall (20-30 mm) from Tungurahua, Ecuador, 2006.
Dusting of Klyuchevskoy ash on camera bag, 2006.
Dusting of Klyuchevskoy ash on camera bag, 2006.
Family Emergency Preparedness Plan
Family Emergency Preparedness Plan
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
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.
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.
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.
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.
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.
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.
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).
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).
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).
Strong shaking during the 1868 Hayward Fault earthquake caused the second story of the Alameda County Courthouse in San Leandro to collapse (photo courtesy of the Bancroft Library, University of California). The inset photo shows the courthouse before the quake
Strong shaking during the 1868 Hayward Fault earthquake caused the second story of the Alameda County Courthouse in San Leandro to collapse (photo courtesy of the Bancroft Library, University of California). The inset photo shows the courthouse before the quake
Shipwrecks and other artificial structures increase the potential for large invasions of unwanted species into coral reefs, even relatively pristine ones. In this picture, a shipwreck in the remote Palmyra Atoll in the central Pacific Ocean resulted in the dense colonization of an invasive coral-like species called Rhodactis howesii, pictured here.
Shipwrecks and other artificial structures increase the potential for large invasions of unwanted species into coral reefs, even relatively pristine ones. In this picture, a shipwreck in the remote Palmyra Atoll in the central Pacific Ocean resulted in the dense colonization of an invasive coral-like species called Rhodactis howesii, pictured here.
Sand Dune Cape Henlopen, Delaware.
Sand Dune Cape Henlopen, Delaware.
USGS personnel at work on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work using acoustic doppler on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work using acoustic doppler on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
Acoustic doppler used to record measurements on Wild Rice River during 2010 flood. Photo taken from bridge at 174th Ave and 124th St southwest of Horace, ND.
Acoustic doppler used to record measurements on Wild Rice River during 2010 flood. Photo taken from bridge at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work using acoustic doppler on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work using acoustic doppler on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.
USGS personnel at work on bridge over Wild Rice River. Photo taken at 174th Ave and 124th St southwest of Horace, ND.