Images

USGS hydrographer Spencer Wheeling gets equipment ready to collect a flood water-quality sample on the Wild Rice River near St.

USGS hydrographer Brent Hanson wades out in freezing waters to collect flood measurements on the Sheyenne River near Cooperstown, North Dakota. Hanson reads an outside staff, which is a vertical graduated ruler used to calibrate the continuous readings of water level provided by electronic sensors.

A frozen USGS rapid deployment streamgage measures the height of the Maple River near Page, North Dakota. RDGs can be installed on short notice to provide additional information at locations that are normally not gauged.

Members of the Clear Lake Volcanic Field research team

As part of a long-term study with the National Park Service to evaluate water quality in the Great Plains, water-quality monitoring equipment was installed at a site on the Niobrara River in Agate Fossil Beds National Monument.

An open-canopied ephemeral wetland occupied by gopher frogs in the northern Florida Peninsula. Wetlands like these surrounded by sandy upland habitat, such as longleaf pine systems, support gopher frog populations.

American toad tucking into the leaf litter seen during fieldwork in Wisconsin.

Blackrock Creek above Split Rock Creek is online and now measuring temperature! http://ow.ly/BE8B50z2xZt Still plenty of snow on Togwotee Pass and since solo trips (to comply with social distancing) take longer, hot drinks are critical.

Blackrock Creek above Split Rock Creek is online and now measuring temperature! http://ow.ly/BE8B50z2xZt Still plenty of snow on Togwotee Pass and since solo trips (to comply with social distancing) take longer, hot drinks are critical.

Cope’s grey treefrog on a tree trunk. Seen during fieldwork in Wisconsin.

Cope’s grey treefrog, green morph, on a tree trunk. Seen during fieldwork in Wisconsin.

Example 2-hours of seismic data from station near Mauna Kea on April 14, 2020. The large spikes are earthquakes under Mauna Kea repeating every ~11 minutes. Bottom waveform zooms in on 15 seconds of an individual event.

USGS Education has several paper models learners can color, cut out, and build. This photo shoes a stratovolcano, trilobite, nautiloid, triceratops, and pterodactyl

Locations of multichannel seismic reflection profiles (in black), collected during cruise FA2020-14. The profiles are overlain on colored and shaded multibeam bathymetry, Lidar topography (green and white) and near-shore bathymetry (darker blue), and NOAA coastal relief model (light blue and white).

USGS Education paper models collection includes dinosaurs and other fossils, and geologic processes like volcanoes and sand dune formation.

For every major earthquake in the U.S., UNAVCO downloads high-rate data from all nearby GPS/GNSS stations. The downloads for the March 31, 2020, magnitude 6.5 Stanley, Idaho, earthquake include more than 20 stations in and around Yellowstone. Figure by Christine Puskas (UNAVCO).

Highly sensitive instruments installed deep below the ground surface yield great records of earthquakes near and far. The March 31, 2020, magnitude 6.5 Stanley, Idaho, earthquake shows up very clearly in borehole strainmeter station B944's four different sensors.

Photo of the Colorado River running through Marble Canyon near Nankoweap Creek (near River Mile 51.5) in the Grand Canyon, Arizona.

Clear weather allowed another water pond measurement to be made this morning. Results show continued slow rise of the water level. No major changes were observed. Note the former HVO observation tower can be seen above the geologist's helmet.

Day to day changes in the color of the water pond are common. This morning the pond had a browner hue compared to the previous observation on April 1, when the pond color was slightly more greenish yellow (see photo below).

Scanning electron microprobe images show the complexity of tiny Icelandic ash grains (150 micron, or 0.006 inch). Image (a) shows a dense and blocky grain, and (b) shows a foamy grain.