Cascades Volcano Observatory

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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.

Digital Elevation Map of Mount St. Helens with annotation of pre-19...

Digital Elevation Map of Mount St. Helens with annotation of pre-19...

This shaded relief image was produced from LIDAR data. LIDAR is an acronym for Light Detection and Ranging, a modern remote sensing technique used to map topography very accurately—more so than is possible with older techniques. The crater is 1.2 miles (1.9 km) wide east-west. Elsewhere the scale varies owing to the oblique viewing angle. The landslide deposit includes

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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.

Cleary day view of MO cam

[MOcam] Mokuʻāweoweo Caldera from South Rim

This image is from a research camera positioned on the south rim of Mokuʻāweoweo, Mauna Loa's summit caldera, in Hawaiʻi Volcanoes National Park. The camera looks north-northwest, focusing on the southern part of the caldera. The 1940 cone is just right of center; the 1949 cone is on the caldera rim at left. The high point of Mauna Loa's summit is in the background.

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Clear day view of ML cam

[MLcam] Mokuʻāweoweo Caldera from the Northwest Rim

This image is from a temporary research camera positioned on the north rim of Mokuʻāweoweo, the summit caldera of Mauna Loa volcano by the USGS Hawaiian Volcano Observatory. If you look carefully around early morning or late evening, you may see a few thermal areas emitting steam. See 'Current Activity' for the latest Mauna Loa information.

Disclaimer

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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.

View from MT cam

[MTcam] Mokuʻāweoweo Caldera Thermal from the Northwest Rim

This image is from a temporary thermal camera located on the north rim of Mauna Loa's summit caldera. The temperature scale is in degrees Celsius up to a maximum of 500 degrees (932 degrees Fahrenheit) for this camera model, and scales automatically based on the maximum and minimum temperatures on the caldera floor and not the whole frame, which sometimes results in the

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Newberry Volcano, Oregon simplified hazards map showing potential i...

Newberry Volcano, OR simplified hazards map

Newberry Volcano, Oregon simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.

Horizontal displacement vectors for GPS stations at Mount St. Helen...

Horizontal displacement vectors at Mount St. Helens (2008-2014)

Map of horizontal displacement vectors for Global Positioning System (GPS) stations in and around Mount St. Helens. Blue arrows show the direction and magnitude of horizontal movement, as measured at the GPS station from 2008-2014. The total horizontal displacement is indicated in millimeters (mm) and inches (in). Light blue circles at the end of the arrows are

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Mount St. Helens before the May 18, 1980 eruption. View from the no...

Mount St. Helens before May 18, 1980 eruption

Before the devastating May 18, 1980 eruption, Mount St. Helens was considered to be one of the most beautiful and most frequently-climbed peaks in the Cascade Range. Spirit Lake was a vacation area offering hiking, camping, boating, and fishing.