Multimedia

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October 20, 2020

The story of Yellowstone's ups and downs

Yellowstone Volcano Observatory Scientist-in-Charge Mike Poland visits Yellowstone National Park to tell the story of how the ground there moves up and down over time. This motion has been measured using a variety of techniques over the past 100 years, and from geological mapping scientists can even tell how the ground has moved going back about 15,000 years! This research

Old Faithful bathhouse during 1914-1933 (top) and 1934-1951 (bottom)
October 17, 2020

Old Faithful bathhouse during 1914-1933 (top) and 1934-1951 (bottom)

Old Faithful bathhouse as it appeared in 1914-1933 (top) and 1934-1951 (bottom).

Yellowstone map with rhyolite eruptions highlighted
October 16, 2020

Yellowstone map with rhyolite eruptions highlighted

Map of Yellowstone National Park adapted from Christiansen and others (2007). The pink regions are rhyolite flows erupted within Yellowstone caldera; these flows contain 5% to 15% crystals by volume. The purple region is the Obsidian Cliff flow, which contains close to 0% crystals.

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.

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.
 

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. 

GNSS site LKWY, on the north side of Yellowstone Lake
September 16, 2020

GNSS site LKWY, on the north side of Yellowstone Lake

GNSS site LKWY, which was visited in September 2020 to install new GNSS equipment and upgrade the communications for improved data quality.  The site is now capable of collecting several times more observation data then was possible with the original older equipment.

The inside of a borehole seismometer equipment enclosure is full of batteries, cables, and other equipment.
September 16, 2020

The inside of a Yellowstone borehole seismometer equipment enclosure

The inside of a borehole seismometer equipment enclosure is full of batteries, cables, data communications equipment and data recording instruments.  Some of the geodetic infrastructure in Yellowstone National Park is colocated with seismic equipment.  In this case, the communications downlink radio for the GNSS station is housed with the borehole enclosure.  This site was

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Upper Geyser Basin viewed from the Old Faithful webcam
September 9, 2020

Upper Geyser Basin viewed from the Old Faithful webcam

The Upper Geyser Basin viewed from the Old Faithful webcam. Hot water was piped from Solitary Geyser to the former site of the geyser bathhouse.

Map of thermal areas and lakes in Yellowstone National Park
September 7, 2020

Map of thermal areas and lakes in Yellowstone National Park

Map of thermal areas in Yellowstone (red), as well as lakes (outlined in blue), many of which have thermal areas on their shores or beneath their surfaces.

High-resolution images of Fern Lake, Yellowstone National Park, from different seasons
September 7, 2020

Fern Lake, Yellowstone National Park, in different seasons

High-resolution images of Fern Lake from different seasons.  North is up.  Fern Lake is about 1 km across from east to west.  Red arrows in the winter image point to large zones of open water, indicating either nearshore springs or underwater hydrothermal vents, but there are also many smaller zones of open water that are conspicuous. 

Shaded relief map showing subtle terraces on the north side of Yellowstone Lake
September 7, 2020

Map showing subtle terraces on the north side of Yellowstone Lake

Shaded relief map based on high-resolution topographic data from lidar and showing subtle terraces on the north side of Yellowstone Lake (a few example terraces are marked by yellow arrows and traced by dashed and dotted white lines). Each terrace represents a high-stand of lake water, which is caused by water backing up into the lake because caldera uplift raised the

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