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Images related to natural hazards.
Incandescent rubble rolling and sliding down the scarp on the edge of the collapsing crater in Pu'u 'O 'o. A remnant of the pre-collapse crater floor can be seen in the background below the crater's south wall. The east rim of Pu'u 'O 'o is in the foreground.
Incandescent rubble rolling and sliding down the scarp on the edge of the collapsing crater in Pu'u 'O 'o. A remnant of the pre-collapse crater floor can be seen in the background below the crater's south wall. The east rim of Pu'u 'O 'o is in the foreground.
New fissure eruption SW of Pu'u 'O 'o between Pu'u 'O 'o and Napau crater. Spatter is reaching 15-20m into the air, above the trees.
New fissure eruption SW of Pu'u 'O 'o between Pu'u 'O 'o and Napau crater. Spatter is reaching 15-20m into the air, above the trees.
Close-up of recently opened fissure segment. Spatter reaching about 5m into the air.
Close-up of recently opened fissure segment. Spatter reaching about 5m into the air.
Close-up of just-opened fissure segment at NE tip of propagating fissure. Spatter reaching 5m into the air. Lava just breaking the ground surface to the left.
Close-up of just-opened fissure segment at NE tip of propagating fissure. Spatter reaching 5m into the air. Lava just breaking the ground surface to the left.
View looking along recently opened fissure segment crossing tephra flats SW of Pu'u 'O 'o, which is in the background.
View looking along recently opened fissure segment crossing tephra flats SW of Pu'u 'O 'o, which is in the background.
View toward the SW of fissure eruption. Fissure segment in forest has shut down. Compare to earlier photos before fissure opened up in tephra.
View toward the SW of fissure eruption. Fissure segment in forest has shut down. Compare to earlier photos before fissure opened up in tephra.
InSAR image Kīlauea, Hawai‘i, Mar. 2011. Kamoamoa fissure trace is indicated by the red line.
InSAR image Kīlauea, Hawai‘i, Mar. 2011. Kamoamoa fissure trace is indicated by the red line.
As lava entered the sea in July 2008, littoral explosions sent incandescent lava fragments skyward, building a small littoral cone on the flank of Kīlauea. USGS photo by B. Gaddis.
As lava entered the sea in July 2008, littoral explosions sent incandescent lava fragments skyward, building a small littoral cone on the flank of Kīlauea. USGS photo by B. Gaddis.
Village of Belacázar, adjacent to the river Paez. Photo taken four years after the 2008 lahar, but the trace of the deposit and destruction is still visible.
Village of Belacázar, adjacent to the river Paez. Photo taken four years after the 2008 lahar, but the trace of the deposit and destruction is still visible.
Unusually high tides, sometimes called "king tides," offer a preview of coastal flooding likely to result from rising sea level. In this photograph, taken during a king tide on February 17, 2011, waves overtop Pier 14 in San Francisco, California.
Unusually high tides, sometimes called "king tides," offer a preview of coastal flooding likely to result from rising sea level. In this photograph, taken during a king tide on February 17, 2011, waves overtop Pier 14 in San Francisco, California.
Since the opening of the Overlook vent in Halema‘uma‘u Crater in 2008, FTIR spectroscopy has been used to monitor summit eruptive-gas composition. Infrared energy emitted by the lava lake surface (top left) is absorbed by gases present in the path between the instrument and the lak surface.
Since the opening of the Overlook vent in Halema‘uma‘u Crater in 2008, FTIR spectroscopy has been used to monitor summit eruptive-gas composition. Infrared energy emitted by the lava lake surface (top left) is absorbed by gases present in the path between the instrument and the lak surface.
Thousands were saved by accurate eruption forecasts of Mount Merapi, Indonesia. House in the village of Kopeng, 6 km (3.7 miles) from summit of Mount Merapi, destroyed by the explosive eruption.
Thousands were saved by accurate eruption forecasts of Mount Merapi, Indonesia. House in the village of Kopeng, 6 km (3.7 miles) from summit of Mount Merapi, destroyed by the explosive eruption.
Blocky, non-vesicular ash particle indicative of water-magma interaction.
Blocky, non-vesicular ash particle indicative of water-magma interaction.
SEM Images of ash particles from the 1989 eruption of Redoubt Volcano, Alaska.
SEM Images of ash particles from the 1989 eruption of Redoubt Volcano, Alaska.
An HVO scientist wearing a gas mask collects GPS data using a roving instrument on the west flank of Pu‘u ‘Ō‘ō. USGS Photo.
An HVO scientist wearing a gas mask collects GPS data using a roving instrument on the west flank of Pu‘u ‘Ō‘ō. USGS Photo.
Sitka, AK.
Absolutes building at Sitka magnetic observatory Alaska.
Absolutes building at Sitka magnetic observatory Alaska.
Electronics building at Sitka magnetic observatory Alaska.
Electronics building at Sitka magnetic observatory Alaska.
Absolutes and variations buildings at Sitka, AK magnetic observatory.
Absolutes and variations buildings at Sitka, AK magnetic observatory.
An HVO scientist and volunteer work to upgrade the power system of a seismic station located in the Ka‘ū desert on Kīlauea's southwest rift zone. USGS Photo.
An HVO scientist and volunteer work to upgrade the power system of a seismic station located in the Ka‘ū desert on Kīlauea's southwest rift zone. USGS Photo.
Gas sampling from a fumarole on the rim of Halema‘uma‘u Crater within Kīlauea caldera, Hawai‘i.
Gas sampling from a fumarole on the rim of Halema‘uma‘u Crater within Kīlauea caldera, Hawai‘i.