Images

Right tool for the job! Which ADCP (acoustic Doppler current profiler) is used at a site depends on how deep, fast, and turbid the stream is. Ensuring the most accurate data collected.

Right tool for the job! Which ADCP (acoustic Doppler current profiler) is used at a site depends on how deep, fast, and turbid the stream is. Ensuring the most accurate data collected.

May 2020 earthquake swarm at Lōʻihi seamount

Depth-averaged velocity and primary and secondary velocities (Rozovskii definition) in the confluence of the White and Wabash Rivers along the Illinois and Indiana border, January 12, 2008. Produced in VMT using data from a TRDI 1200 KHz Rio Grande ADCP and additional formatting using Adobe Illustrator.

Depth-averaged currents and distribution of near-surface specific conductance in coastal Lake Erie in the vicinity of Villa Angela Beach and Euclid Creek, Ohio on September 11, 2012 Produced in VMT using data from a TRDI 600 KHz Rio Grande ADCP and supplementary specific conductance data from an autonomous underwater vehicle (AUV) that completed a simulataeous three

Map of earthquakes greater than M1.5 that occurred between March 1 and May 12, 2020, in the Intermountain West. The main shock-aftershock sequences in central Idaho and near Salt Lake City are labeled. Orange dots are earthquakes that occurred within 24 hours, and yellow 1 week, of the map being generated (May 12, 2020)

Schematic diagram illustrating the difference between a main shock with aftershocks (top), a sequences of foreshocks, main shock, and aftershocks (middle), and a seismic swarm (bottom).  Adapted from manuscript by Farrell and others, 2009.

_{A map of the lower East Rift Zone of Kīlauea Volcano showing the fissures and flow fields from the 1955 (blue) and 2018 (pink) eruptions. Portions of the 1955 lava flows that were covered during the 2018 eruption, are represented with a blue outline.}
 

A small rockslide occurred today on the south wall of Halema‘uma‘u, sending boulders into the water at the bottom of the crater. USGS video by M. Patrick.

A view from the south rim of Halema‘uma‘u shows a lower collapsed block which has remains of Crater Rim Drive and the Halema‘uma‘u parking lot. The white feature in the lower right is a stop sign that was present at the eastern exit of the parking lot.

Deena Green setting up WinRiver II to make a RioPro measurement at the Selway River near Lowell, ID.

Getting ready to collect sample number 378 at Green Riv blw Green Riv. Samples collected at regular intervals over a long period of time are critical for understanding current water-quality conditions and changes.

HVO technician inspects power/communication station at Pu‘u ‘Ō‘ō on on April 16, 2020. USGS photos by F. Younger.

USGS gage 10317500 North Fork Humbolt river near devils gate near Halleck, Nevada. 

USGS scientists collect field data at Gulkana Glacier in the eastern Alaska Range. The checkerboard sampling pattern in the foreground indicates where snow pit density measurements were collected.

Marine technician Dan Powers, from the Pacific Coastal and Marine Science Center's Marine Facility (PCMSC MarFac), wears all the required personal protective equipment: bib waders, personal floatation device, and mask.

View of the recently cleared Boiling Pots on the Wailuku River in Hilo. The pots, each about 15 m (50 ft) in diameter, are eroded into a 10,000 year old Mauna Loa lava flow. When the water is low, the river does not flow over some of the pot rims but it continues to flow through them.

A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.

A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.

A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.

USGS hydrologist Ken McGrath measures floodwaters off a cableway on Schoharie Creek in North Blenheim, New York.