Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Volcano Hazard Program images.
On July 21, 2007, an erupting fissure opened on the east flank of Pu‘u ‘Ō‘ō and propagated eastward toward Kupaianaha.
On July 21, 2007, an erupting fissure opened on the east flank of Pu‘u ‘Ō‘ō and propagated eastward toward Kupaianaha.
The contact (red arrow) between Huckleberry Ridge Tuff ignimbrite members B and C is marked by a time break of probably years to a few decades.
The contact (red arrow) between Huckleberry Ridge Tuff ignimbrite members B and C is marked by a time break of probably years to a few decades.
Aerial photo of Mount Shasta's southwestern flank in a low-snow period. The Hotlum cone is on the right, while the Shastina dome is to the left.
Aerial photo of Mount Shasta's southwestern flank in a low-snow period. The Hotlum cone is on the right, while the Shastina dome is to the left.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Loowit Falls and channel flowing toward the north through the east side of Mount St. Helen's breach.
Loowit Falls and channel flowing toward the north through the east side of Mount St. Helen's breach.
Glacier Peak volcano, Washington, viewed from the east.
Glacier Peak volcano, Washington, viewed from the east.
Western edge of Sherman Crater in the foreground of the Mount Baker Summit, Washington, view slightly northwestward.
Western edge of Sherman Crater in the foreground of the Mount Baker Summit, Washington, view slightly northwestward.
USGS scientist observing Mount St. Helens' crater and dome from the Brutus Camera station.
USGS scientist observing Mount St. Helens' crater and dome from the Brutus Camera station.
Morning overflight view to the south. The Cape Kumukahi Light can be seen in amongst the flows in the lower portion of the photograph. Ocean entry is still present just offshore of Kapoho with a more robust entry to the south (larger steam plume) near Ahalanui Beach Park.
Morning overflight view to the south. The Cape Kumukahi Light can be seen in amongst the flows in the lower portion of the photograph. Ocean entry is still present just offshore of Kapoho with a more robust entry to the south (larger steam plume) near Ahalanui Beach Park.
Mount Baker and Bellingham, Washington on Bellingham Bay.
Mount Baker and Bellingham, Washington on Bellingham Bay.
Mount Adams western profile as seen from Mount St. Helens.
Mount Adams western profile as seen from Mount St. Helens.
Summit of Glacier Peak, Washington, view toward the east.
Summit of Glacier Peak, Washington, view toward the east.
This lava delta at Lae‘apuki added about 24 hectares (60 acres) of new land to the southeast coast of Kīlauea in 2006, but 6.5 hectares (16 acres) slid into the sea in 2007. White plume marks location of lava entering the sea through a tube whose location is shown by blueish fume in middle right.
This lava delta at Lae‘apuki added about 24 hectares (60 acres) of new land to the southeast coast of Kīlauea in 2006, but 6.5 hectares (16 acres) slid into the sea in 2007. White plume marks location of lava entering the sea through a tube whose location is shown by blueish fume in middle right.
View of the church's front entrance, showing the collapsed wall under the eave, framing, and wall above the doors. The pile of building debris shows why taking cover (Drop! Cover! Hold on!) inside a building is safer than trying to run outside or stand in a doorway when the ground shakes.
View of the church's front entrance, showing the collapsed wall under the eave, framing, and wall above the doors. The pile of building debris shows why taking cover (Drop! Cover! Hold on!) inside a building is safer than trying to run outside or stand in a doorway when the ground shakes.
Seismic station at Yellow Rock (YEL) with the toe of the west arm of Crater Glacier in the background. This station site was eventually covered by the glacier.
Seismic station at Yellow Rock (YEL) with the toe of the west arm of Crater Glacier in the background. This station site was eventually covered by the glacier.
Lava pours over the former sea cliff at East Lae‘apuki onto an active lava delta (left of cliff). The lava broke out from a lava tube just inland of the sea cliff (right of photograph).
Lava pours over the former sea cliff at East Lae‘apuki onto an active lava delta (left of cliff). The lava broke out from a lava tube just inland of the sea cliff (right of photograph).
Seismic station at Three Sisters volcano in Central Oregon. Seismometer in box on the ground with data transmission antenna mounted on pole.
Seismic station at Three Sisters volcano in Central Oregon. Seismometer in box on the ground with data transmission antenna mounted on pole.
Columnar joints in horizontal orientation along the Ricksecker lava flow margin. Columns formed as lava cooled against valley filling glaciers leaving flows perched high on Mount Rainier's ridges.
Columnar joints in horizontal orientation along the Ricksecker lava flow margin. Columns formed as lava cooled against valley filling glaciers leaving flows perched high on Mount Rainier's ridges.
Panoramic photograph from the southern rim of Mount St. Helens' crater rim looking north with accompanying annotation.
Panoramic photograph from the southern rim of Mount St. Helens' crater rim looking north with accompanying annotation.
View the annotated version of this photograph.
View the annotated version of this photograph.