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Volcano Hazard Program images.
During the cleanup after the 18 August 1992 eruption of Mt Spurr volcano, Alaska. The population of Anchorage used mostly wet methods to clean up the ash, creating a peak water demand which resulted in water shortages and loss of pressure in some parts of the city due to bottlenecks in the distribution system.
During the cleanup after the 18 August 1992 eruption of Mt Spurr volcano, Alaska. The population of Anchorage used mostly wet methods to clean up the ash, creating a peak water demand which resulted in water shortages and loss of pressure in some parts of the city due to bottlenecks in the distribution system.
Ash buries cars and buildings after the 1984 eruption of Rabaul, Papua New Guinea.
Ash buries cars and buildings after the 1984 eruption of Rabaul, Papua New Guinea.
Featured speaker from Colombia discusses lahars at Orting, Washington, event.
Featured speaker from Colombia discusses lahars at Orting, Washington, event.
Mount Rainier 2018 Teacher Workshop
Mount Rainier 2018 Teacher Workshop
The USGS-Cascades Volcano Observatory opens its doors to the public on Saturday, May 12, for a one-day open house. Scientists will be on-hand from 10:00 am to 5:00 pm to share the results of their research and talk about volcano hazards. Hands-on activities and equipment demonstrations will be featured.
The USGS-Cascades Volcano Observatory opens its doors to the public on Saturday, May 12, for a one-day open house. Scientists will be on-hand from 10:00 am to 5:00 pm to share the results of their research and talk about volcano hazards. Hands-on activities and equipment demonstrations will be featured.
Sideromelane and tachylite shards collected 12 km from source at Mount Etna, 2002. The width of view is 1 mm
Sideromelane and tachylite shards collected 12 km from source at Mount Etna, 2002. The width of view is 1 mm
Aerial view of Mount St. Helens, taken from the southwest.
Aerial view of Mount St. Helens, taken from the southwest.
Oceanic crust forms by eruptions along the Juan de Fuca ridge. As the Juan de Fuca plate drifts eastward, it cools, becomes more dense, and eventually dives under the less dense continental plate at the Cascadia trench.
Oceanic crust forms by eruptions along the Juan de Fuca ridge. As the Juan de Fuca plate drifts eastward, it cools, becomes more dense, and eventually dives under the less dense continental plate at the Cascadia trench.
Geologic Hazards at Volcanoes. To download the full poster click here.
Geologic Hazards at Volcanoes. To download the full poster click here.
Mount Rainier Teacher Workshop Participants 2011
Mount Rainier Teacher Workshop Participants 2011
Columbian photographer Reid Blackburn's camera, recovered from the Mount St. Helens blast zone in 1980. The film in it was too damaged to yield images.
Columbian photographer Reid Blackburn's camera, recovered from the Mount St. Helens blast zone in 1980. The film in it was too damaged to yield images.
Lava-flow hazard zone map, Hawai‘i Island
Lava-flow hazard zone map, Hawai‘i Island
The station is a lahar monitoring station with a broadband seismometer and video camera. Data from the station use radio telemetry to send real time information to the Instituto Geofisico of Ecuador.
The station is a lahar monitoring station with a broadband seismometer and video camera. Data from the station use radio telemetry to send real time information to the Instituto Geofisico of Ecuador.
Pyroclastic flow cartoon depicting the flow moving down the slope of a volcano through a valley.
Pyroclastic flow cartoon depicting the flow moving down the slope of a volcano through a valley.
LOS = Line of Sight
Example of an event-tree schematic used when forecasting the probable scenarios that may play out in the event of volcanic unrest or eruption. Scenarios are updated as events unfold.
Example of an event-tree schematic used when forecasting the probable scenarios that may play out in the event of volcanic unrest or eruption. Scenarios are updated as events unfold.
Emergency response planning exercise for a volcanic event with Washington State and local government officials.
Emergency response planning exercise for a volcanic event with Washington State and local government officials.
Three images of crop damage, ash plume and cleanup for the homepage
Three images of crop damage, ash plume and cleanup for the homepage
Ashfall will cause accelerated wear and tear on sewage pump impellers (metal pitting and thinning).
Ashfall will cause accelerated wear and tear on sewage pump impellers (metal pitting and thinning).
Drill records have found traces of previously formed shorelines (strandlines) depressed below the current sea level - further evidence of subsidence due to the added weight of the volcano.
Drill records have found traces of previously formed shorelines (strandlines) depressed below the current sea level - further evidence of subsidence due to the added weight of the volcano.
American and Colombian exchange participants among the ruins in Amero, which was destroyed by an eruption of Nevado del Ruiz in 1985.
American and Colombian exchange participants among the ruins in Amero, which was destroyed by an eruption of Nevado del Ruiz in 1985.