Volcano Hazards Program Office

Multimedia

Filter Total Items: 2,810
Obsidian Cliff lava flow, Yellowstone
October 16, 2020

Obsidian Cliff lava flow, Yellowstone

Photograph of Obsidian Cliff along Grand Loop Road between Norris and Mammoth Hot Springs. Photograph by John Good, U.S. National Park Service, 1965.

GPS mast installed at station LSON, on Mount Hood
October 1, 2020

CVO geophysicist installs a GPS mast at station LSON, Mount Hood

USGS Cascades Volcano Observatory Geophysicist Rebecca Kramer works on the installation of the GPS mast at new station LSON, at Mount Hood. The GPS measures subtle ground deformation that can occur in response to magma entering or leaving the magma reservoir several miles below the summit.

Combined seismic/GPS station LSON on Mount Hood
October 1, 2020

Combined seismic/GPS station LSON on Mount Hood

Combined seismic/GPS station LSON, on Mount Hood, installed at the end of September 2020. LSON is one of three new stations that enhance the existing monitoring network at this high-threat volcano.

October 1, 2020

Yellowstone Volcano Observatory Monthly Update: October 1, 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during September 2020.
 

Volcano monitoring station BRSP, on the north flank of Mount Hood
October 1, 2020

Volcano monitoring station BRSP, on the north flank of Mount Hood

View of the combined seismic/GPS station BRSP, on the north flank of Mount Hood, Oregon. Mount Hood is pictured in the distance.

Finishing the installation of seismic/GPS station YOCR, at Mount Hood
October 1, 2020

Finishing the installation of seismic/GPS station YOCR, at Mount Hood

A USGS Cascades Volcano Observatory field team finishes the installation of the combined seismic/GPS station, YOCR, at Mount Hood, Oregon.

Seismic/GPS station YOCR, at Mount Hood
October 1, 2020

Seismic/GPS station YOCR, at Mount Hood

A Cascades Volcano Observatory field team completes the installation of the combined seismic/GPS station YOCR, at Mount Hood. Effective monitoring requires a geographically distributed network of instruments that are located on the upper flanks, and around the volcano, and for these stations to be in place before significant unrest occurs to catch the earliest subtle

...
Map of geodetic infrastructure located in Yellowstone National Park
September 30, 2020

Map of geodetic infrastructure located in Yellowstone National Park

The UNAVCO-operated geodetic infrastructure located in Yellowstone National Park consists of over a dozen continuously operating geodetic sites.  Most of these sites stream real-time data to the UNAVCO data center.  After the September 2020 maintenance trip, there are now 8 fully upgraded GNSS sites (red square) located in the park. 

Color photograph of native sulfur crystals
September 30, 2020

Crystals of pure native sulfur at sites of degassing called fumaroles

Different sulfur gases, including sulfur dioxide (SO2) and hydrogen sulfide (H2S), can react with each other to deposit crystals of pure native sulfur at sites of degassing called fumaroles. The crystals picture here formed within a Sulphur Banks area fumarole in Hawai‘i Volcanoes National Park. USGS photo by T. Elias.

Color photograph of yellow native sulfur crystals
September 30, 2020

Close-up image of native sulfur crystals

A close-up image of native sulfur crystals that formed within fumaroles at the Sulphur Banks in Hawai‘i Volcanoes National Park. In addition to sulfur species and other gases, volcanoes emit water vapor. Here, some of the vapor has condensed to liquid water and formed droplets visible on the sulfur crystals. USGS photo by P. Nadeau. 

Photograph of tubing inserted into a fumarole
September 30, 2020

Tubing inserted into a fumarole

Tubing inserted into a fumarole at the Sulphur Banks in Hawai‘i Volcanoes National Park allows HVO gas scientists to sample gas. The gas travels through the tube into gas sampling bottles for later analyses. USGS photo by M. Warren.

New seismic/GPS station (LSON) installed at Mount Hood
September 30, 2020

New seismic/GPS station (LSON) installed at Mount Hood

USGS Cascades Volcano Observatory Geophysicist Wes Thelen, removes ropes from new station LSON, at Mount Hood (Mount Hood is pictured in the distance). The fiberglass hut, delivered by helicopter, will house a power supply, data digitizer and other equipment necessary to collect and send seismic and GPS data to the Cascades Volcano Observatory and their monitoring partners

...