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Images related to natural hazards.
This photograph shows the south margin of the June 27th flow, northeast of Pu‘u ‘Ō‘ō, where many small scattered breakouts were active. The active, and recently active, breakouts are visible at the light gray areas.
This photograph shows the south margin of the June 27th flow, northeast of Pu‘u ‘Ō‘ō, where many small scattered breakouts were active. The active, and recently active, breakouts are visible at the light gray areas.
Looking southwest across the surface of Halema‘uma‘u lava lake on January 23, 1918. Jagged "crags" of stranded, solidified lava rise as much as 30 m (100 ft) above the surface of the lake. A natural levee separates the smooth surface of the active lava lake from overflows of pāhoehoe in foreground. Photo by Thomas A. Jaggar, Jr.
Looking southwest across the surface of Halema‘uma‘u lava lake on January 23, 1918. Jagged "crags" of stranded, solidified lava rise as much as 30 m (100 ft) above the surface of the lake. A natural levee separates the smooth surface of the active lava lake from overflows of pāhoehoe in foreground. Photo by Thomas A. Jaggar, Jr.
Research geologist Carl Thornber leads a group of Mount St. Helens National Volcanic Monument interpretive rangers and volunteers along the boardwalk at the Trail of Two Forests, explaining the formation of lava tubes and tree molds from the 1900-year-old Cave Basalt Flow on the south side of Mount St. Helens.
Research geologist Carl Thornber leads a group of Mount St. Helens National Volcanic Monument interpretive rangers and volunteers along the boardwalk at the Trail of Two Forests, explaining the formation of lava tubes and tree molds from the 1900-year-old Cave Basalt Flow on the south side of Mount St. Helens.
A UV camera measuring SO2 emissions from the 2009 dome of Redoubt Volcano, June 13, 2015.
A UV camera measuring SO2 emissions from the 2009 dome of Redoubt Volcano, June 13, 2015.
Sam Johnson explaining details of the Hosgri fault zone at USGS offices in Santa Cruz.
Sam Johnson explaining details of the Hosgri fault zone at USGS offices in Santa Cruz.
Geophysicist Sam Johnson explaining details of the San Andreas fault zone at USGS offices in Santa Cruz.
Geophysicist Sam Johnson explaining details of the San Andreas fault zone at USGS offices in Santa Cruz.
One month ago the summit lava lake was at the rim of the Overlook crater (the small crater in the center of the photo), spilling lava onto the floor of Halema‘uma‘u Crater (the larger crater that fills much of the photo), creating the dark flows surrounding the Overlook crater.
One month ago the summit lava lake was at the rim of the Overlook crater (the small crater in the center of the photo), spilling lava onto the floor of Halema‘uma‘u Crater (the larger crater that fills much of the photo), creating the dark flows surrounding the Overlook crater.
This map shows recent changes to Kīlauea's active East Rift Zone lava flow field. The area of the flow on May 21 is shown in pink, while widening and advancement of the flow as of June 4 is shown in red. Pu‘u ‘Ō‘ō lava flows erupted prior to June 27, 2014, are shown in gray.
This map shows recent changes to Kīlauea's active East Rift Zone lava flow field. The area of the flow on May 21 is shown in pink, while widening and advancement of the flow as of June 4 is shown in red. Pu‘u ‘Ō‘ō lava flows erupted prior to June 27, 2014, are shown in gray.
This small-scale map shows Kīlauea's active East Rift Zone lava flow in relation to lower Puna. The area of the flow on May 21 is shown in pink, while widening and advancement of the flow as of June 4 is shown in red.
This small-scale map shows Kīlauea's active East Rift Zone lava flow in relation to lower Puna. The area of the flow on May 21 is shown in pink, while widening and advancement of the flow as of June 4 is shown in red.
As shown in the May 21 field photos, the small forested cone of Pu‘u Kahauale‘a has been slowly buried by flows over the past several months. All that remains today are narrow portions of the rim standing above the lava.
As shown in the May 21 field photos, the small forested cone of Pu‘u Kahauale‘a has been slowly buried by flows over the past several months. All that remains today are narrow portions of the rim standing above the lava.
Activity at Pu‘u ‘Ō‘ō remains relatively steady. This photograph looks towards the southwest, and shows outgassing from numerous areas in Pu‘u ‘Ō‘ō crater. On the far side of the crater, the small circular pit (right of center) had a small lava pond that was too deep to see from this angle.
Activity at Pu‘u ‘Ō‘ō remains relatively steady. This photograph looks towards the southwest, and shows outgassing from numerous areas in Pu‘u ‘Ō‘ō crater. On the far side of the crater, the small circular pit (right of center) had a small lava pond that was too deep to see from this angle.
Recent lava on the June 27th flow cascaded over the overhanging rim of this collapse pit on an earlier portion of the flow field.
Recent lava on the June 27th flow cascaded over the overhanging rim of this collapse pit on an earlier portion of the flow field.
A wide view of the northern portion of Kīlauea Caldera, on an exceptionally clear day. HVO and Jaggar Museum can be seen as the light-colored spot on the caldera rim. Mauna Loa is in the distance.
A wide view of the northern portion of Kīlauea Caldera, on an exceptionally clear day. HVO and Jaggar Museum can be seen as the light-colored spot on the caldera rim. Mauna Loa is in the distance.
Scattered breakouts remain active northeast of Pu‘u ‘Ō‘ō. On today's overflight, breakouts were active as far as 8 km (5 miles) northeast of Pu‘u ‘Ō‘ō. Some of this activity was at the forest boundary, burning vegetation.
Scattered breakouts remain active northeast of Pu‘u ‘Ō‘ō. On today's overflight, breakouts were active as far as 8 km (5 miles) northeast of Pu‘u ‘Ō‘ō. Some of this activity was at the forest boundary, burning vegetation.
Halema‘uma‘u Crater, looking west. The dark area on the crater floor consists of recent overflows from the Overlook crater. The Overlook crater is near the left edge of the photo, and a portion of the active lava lake surface can be seen below the rim.
Halema‘uma‘u Crater, looking west. The dark area on the crater floor consists of recent overflows from the Overlook crater. The Overlook crater is near the left edge of the photo, and a portion of the active lava lake surface can be seen below the rim.
This satellite image was captured on Saturday, May 30, by the Advanced Land Imager instrument onboard NASA's Earth Observing 1 satellite. The image is provided courtesy of NASA's Jet Propulsion Laboratory. Although this is a false-color image, the color map has been chosen to mimic what the human eye would expect to see.
This satellite image was captured on Saturday, May 30, by the Advanced Land Imager instrument onboard NASA's Earth Observing 1 satellite. The image is provided courtesy of NASA's Jet Propulsion Laboratory. Although this is a false-color image, the color map has been chosen to mimic what the human eye would expect to see.
Earthquakes at Mauna Loa from June 2013 to June 2015. Green circles are 0-5 km (0-3 mi) deep and similar to ones prior to 1975 and 1984 eruptions, but cluster of 5-10 km (3-6 mi) deep quakes missing.
Earthquakes at Mauna Loa from June 2013 to June 2015. Green circles are 0-5 km (0-3 mi) deep and similar to ones prior to 1975 and 1984 eruptions, but cluster of 5-10 km (3-6 mi) deep quakes missing.
Villagers in Kerauja below a rock slide that resulted from a magnitude 7.8 earthquake on April 25, 2015 in Gorkha district, Nepal.
Villagers in Kerauja below a rock slide that resulted from a magnitude 7.8 earthquake on April 25, 2015 in Gorkha district, Nepal.
Road and bridge damage on the Blanco River near Blanco, Texas, from the Memorial Day 2015 Flood.
Road and bridge damage on the Blanco River near Blanco, Texas, from the Memorial Day 2015 Flood.
USGS scientists are working to model shorebird habitat availability both today and in the future, given processes like sea-level rise, in an effort to support the efficient management of beaches for both people and nesting shorebirds.
USGS scientists are working to model shorebird habitat availability both today and in the future, given processes like sea-level rise, in an effort to support the efficient management of beaches for both people and nesting shorebirds.
This map shows recent changes to Kīlauea's active East Rift Zone lava flow field. The area of the flow on April 23 is shown in pink, while widening and advancement of the flow as of May 21 is shown in red. Pu‘u ‘Ō‘ō lava flows erupted prior to June 27, 2014, are shown in gray.
This map shows recent changes to Kīlauea's active East Rift Zone lava flow field. The area of the flow on April 23 is shown in pink, while widening and advancement of the flow as of May 21 is shown in red. Pu‘u ‘Ō‘ō lava flows erupted prior to June 27, 2014, are shown in gray.