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Volcano Hazard Program images.
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.
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 monitoring site where water is collected and measured for chemicals that may signal volcanic unrest.
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 originated from Mount Adams. Thickness of deposit is about 2.5 m (8 ft).
Lahar deposit cross section in the Trout Lake lowland, which originated from Mount Adams. Thickness of deposit is about 2.5 m (8 ft).
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.
Three Sisters annotated photograph viewed from south to North from Broken Top, Oregon.
Three Sisters annotated photograph viewed from south to North from Broken Top, Oregon.
No date exists for this photograph, but the image is likely circa 1900. Note the postcard copyright date of 1903.
No date exists for this photograph, but the image is likely circa 1900. Note the postcard copyright date of 1903.
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 observed and measured with these two digital elevation models (DEMs) developed before and after the eruptive episode.
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 after a landscape has been covered by loose volcanic material. Sign on the slopes of Rabaul, Papua New Guinea.
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.
Volcano Evacuation Route sign along a roadway in Washington State.
Volcano Evacuation Route sign along a roadway in Washington State.
Distribution of young volcanic rocks by age in Haleakalā Crater, Maui.
Distribution of young volcanic rocks by age in Haleakalā Crater, Maui.
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.
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 and across the State of Hawaii (inset).
Seismic station locations (red triangles) on the Island of Hawai‘i and across the State of Hawaii (inset).
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 near Nymph Lake, Yellowstone National Park.
Scientist collects a sample of gas in a vacuum sealed glass bottle near Nymph Lake, Yellowstone National Park.
Moderate ash on corn crops from eruption of Tungurahua, Ecuador, 2007.
Moderate ash on corn crops from eruption of Tungurahua, Ecuador, 2007.
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.
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.
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 confined between large glaciers. Glacier Peak, Washington, view north.
Exposed rock ridges are thick Pleistocene lava flows that were confined between large glaciers. Glacier Peak, Washington, view north.
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.