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Volcano Hazard Program images.

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A black-and-white stereograph photo pair shows a horse-drawn cart advancing toward the photographer on a muddy dirt road. In the middle ground, an early-20th century hotel is flanked by other small shops and a single telegraph pole. In the background, a double-peaked snow clad mountain rises high above the town, faded with distance.
Stereograph photo of Mount Shasta and the town of Sisson in 1906
Stereograph photo of Mount Shasta and the town of Sisson in 1906
Stereograph photo of Mount Shasta and the town of Sisson in 1906

Horse-drawn carriage on road in Sisson, California, El Monte Hotel in foreground, Mount Shasta in the background. Image courtesy of the Library of Congress.

Boulder Creek leading from Mount Baker, Washington is a hydrology m...
Boulder Creek leading from Mount Baker, WA is a hydrology monitorin...
Boulder Creek leading from Mount Baker, WA is a hydrology monitorin...
Boulder Creek leading from Mount Baker, WA is a hydrology monitorin...

Boulder Creek leading from Mount Baker, Washington is a hydrology monitoring site where water is collected and measured for chemicals that may signal volcanic unrest.

Lahar deposit cross section in the Trout Lake lowland, which origin...
Lahar deposit cross section in the Trout Lake lowland, which origin...
Lahar deposit cross section in the Trout Lake lowland, which origin...
Lahar deposit cross section in the Trout Lake lowland, which origin...

Lahar deposit cross section in the Trout Lake lowland, which originated from Mount Adams. Thickness of deposit is about 2.5 m (8 ft).

North Sister's steep northeast face, thick summit lava flow makes u...
North Sister's steep NE face, thick summit lava flow makes up "Glis...
North Sister's steep NE face, thick summit lava flow makes up "Glis...
North Sister's steep NE face, thick summit lava flow makes up "Glis...

Remnant of Villard Glacier is in cirque below. Thick summit lava flow makes up "Glisan Pinnacle," which overlies hundreds of thin rubbly lava flows that are intercalated with red-oxidized agglutinate and scoria falls exposed on 800-m- (2600-ft-) high face below. Flows that form ridge at upper right are thicker than those on most of edifice.

Remnant of Villard Glacier is in cirque below. Thick summit lava flow makes up "Glisan Pinnacle," which overlies hundreds of thin rubbly lava flows that are intercalated with red-oxidized agglutinate and scoria falls exposed on 800-m- (2600-ft-) high face below. Flows that form ridge at upper right are thicker than those on most of edifice.

Sherman Crater, Mount Baker, Washington. Postcard photograph taken ...
Sherman Crater, Mount Baker, WA. Postcard photograph taken from sou...
Sherman Crater, Mount Baker, WA. Postcard photograph taken from sou...
Baker Lake shorelines were closed during 1975 increase in Mount Bak...
Baker Lake shorelines were closed during 1975 increase in Mount Bak...
Baker Lake shorelines were closed during 1975 increase in Mount Bak...
Baker Lake shorelines were closed during 1975 increase in Mount Bak...

This notice was posted at campgrounds around Baker Lake by the US Forest Service in June 1975. Normally, Baker Reservoir approaches capacity during mid-summer. At most other times, reservoir levels are low enough to impound lahars the size of those that occurred in 1843.

This notice was posted at campgrounds around Baker Lake by the US Forest Service in June 1975. Normally, Baker Reservoir approaches capacity during mid-summer. At most other times, reservoir levels are low enough to impound lahars the size of those that occurred in 1843.

Dome building episode from 2004-2008 at Mount St. Helens can be obs...
Dome building episode from 2004-2008 at Mount St. Helens can be obs...
Dome building episode from 2004-2008 at Mount St. Helens can be obs...
Dome building episode from 2004-2008 at Mount St. Helens can be obs...

Dome building episode from 2004-2008 at Mount St. Helens can be observed and measured with these two digital elevation models (DEMs) developed before and after the eruptive episode.

Volcanic mudflows (lahars and debris flows) occur more commonly aft...
Volcanic mudflows (lahars and debris flows) occur more commonly aft...
Volcanic mudflows (lahars and debris flows) occur more commonly aft...
Volcanic mudflows (lahars and debris flows) occur more commonly aft...

Volcanic mudflows (lahars and debris flows) occur more commonly after a landscape has been covered by loose volcanic material. Sign on the slopes of Rabaul, Papua New Guinea.

Children pose with 8 ton ballistic block at Kīlauea volcano, Hawai‘...
Children pose with 8 ton ballistic block at Kīlauea, Hawai‘i.
Children pose with 8 ton ballistic block at Kīlauea, Hawai‘i.
Children pose with 8 ton ballistic block at Kīlauea, Hawai‘i.

Some of the large ballistic blocks from the Kīlauea eruption of 1924 later became visitor attractions. Many of these blocks remain in place today as evidence of the forces unleashed at Kīlauea during the eruption of 1924.

Some of the large ballistic blocks from the Kīlauea eruption of 1924 later became visitor attractions. Many of these blocks remain in place today as evidence of the forces unleashed at Kīlauea during the eruption of 1924.

Automated sulfur dioxide gas measuring site using ultraviolet camer...
Automated sulfur dioxide gas measuring site using ultraviolet camer...
Automated sulfur dioxide gas measuring site using ultraviolet camer...
Automated sulfur dioxide gas measuring site using ultraviolet camer...

Top: Photograph of the SO2 camera installation when scientists tested the radio link to the Hawaiian Volcano Observatory (HVO). The camera is aimed at the plume emitting from the Overlook Crater, about 1.4 km away. Under typical trade wind conditions, the plume is blown to the southwest, thus moving from right to left in the imagery.

Top: Photograph of the SO2 camera installation when scientists tested the radio link to the Hawaiian Volcano Observatory (HVO). The camera is aimed at the plume emitting from the Overlook Crater, about 1.4 km away. Under typical trade wind conditions, the plume is blown to the southwest, thus moving from right to left in the imagery.

Seismic station locations (red triangles) on the Island of Hawai‘i ...
Seismic station locations (red triangles) on the Island of Hawai‘i ...
Seismic station locations (red triangles) on the Island of Hawai‘i ...
Earthquakes near the Island of Hawai‘i between 1970-2006 with magni...
Quakes near Hawai‘i between 1970-2006 with mag greater than 2.6
Quakes near Hawai‘i between 1970-2006 with mag greater than 2.6
Quakes near Hawai‘i between 1970-2006 with mag greater than 2.6

Earthquakes near the Island of Hawai‘i between 1970-2006 with magnitude greater than 2.5. A (top left): locations of shallow earthquakes 0-22 km (0-14 mi) depth. B (top right): locations of deep earthquakes 22-55 km depth (14-34 mi). Bottom (C): cross section showing the depths of earthquakes in the rectangle in figure B.

Earthquakes near the Island of Hawai‘i between 1970-2006 with magnitude greater than 2.5. A (top left): locations of shallow earthquakes 0-22 km (0-14 mi) depth. B (top right): locations of deep earthquakes 22-55 km depth (14-34 mi). Bottom (C): cross section showing the depths of earthquakes in the rectangle in figure B.

Scientist collects a sample of gas in a vacuum sealed glass bottle ...
Scientist collect sample of gas near Nymph Lake
Scientist collect sample of gas near Nymph Lake
Scientist collect sample of gas near Nymph Lake

Scientist collects a sample of gas in a vacuum sealed glass bottle near Nymph Lake, Yellowstone National Park.

Topographic map, Mount St. Helens, C.E. 1919 annotated with locatio...
Topographic map, Mount St. Helens, C.E. 1919 annotated with locatio...
Topographic map, Mount St. Helens, C.E. 1919 annotated with locatio...
Topographic map, Mount St. Helens, C.E. 1919 annotated with locatio...

Due to the cataclysmic eruption of May 18, 1980, many of the locations annotated on this map are now either covered or no longer visible.

Dusty Creek drainage experiences regular lahars. Gamma Ridge Format...
Dusty Creek drainage experiences regular lahars. Gamma Ridge Format...
Dusty Creek drainage experiences regular lahars. Gamma Ridge Format...
Dusty Creek drainage experiences regular lahars. Gamma Ridge Format...

Non-volcanic peaks of the North Cascades lie in the background. Dusty Creek drainage experiences regular lahars. Gamma Ridge Formation are hydrothermally altered rocks on left ridge. Loose pyroclastic fill deposits cap right ridge; Eastern view, Glacier Peak, Washington.

Non-volcanic peaks of the North Cascades lie in the background. Dusty Creek drainage experiences regular lahars. Gamma Ridge Formation are hydrothermally altered rocks on left ridge. Loose pyroclastic fill deposits cap right ridge; Eastern view, Glacier Peak, Washington.

Exposed rock ridges are thick Pleistocene lava flows that were conf...
Exposed rock ridges are thick Pleistocene lava flows that were conf...
Exposed rock ridges are thick Pleistocene lava flows that were conf...
Exposed rock ridges are thick Pleistocene lava flows that were conf...

Exposed rock ridges are thick Pleistocene lava flows that were confined between large glaciers. Glacier Peak, Washington, view north.

Tracking the advance of Crater Glacier at Mount St. Helens, Washing...
Tracking the advance of Crater Glacier at Mount St. Helens, WA
Tracking the advance of Crater Glacier at Mount St. Helens, WA
Tracking the advance of Crater Glacier at Mount St. Helens, WA

Information regarding volume and rates of advance for the crevassed Crater Glacier at Mount St. Helens, Washington, are extracted from Digital Elevation Models created from aerial photography. The red line shows the extent of Crater Glacier in 2012. Since 2012, the glacier has advanced about 50 m (160 ft) down the Loowit channel.

Information regarding volume and rates of advance for the crevassed Crater Glacier at Mount St. Helens, Washington, are extracted from Digital Elevation Models created from aerial photography. The red line shows the extent of Crater Glacier in 2012. Since 2012, the glacier has advanced about 50 m (160 ft) down the Loowit channel.

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