Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Access all multimedia to include images, video, audio, webcams, before-after imagery, and more. Filter and explore with filtering options to refine search.
The "Short-term Sulfur Dioxide Advisory Level Information" table (http://www.hiso2index.info/assets/FinalSO2Exposurelevels.pdf) uses a six-tiered color-coded system to depict sulfur dioxide (SO2) concentrations and provide guidance for different groups of people exposed to SO2.
The "Short-term Sulfur Dioxide Advisory Level Information" table (http://www.hiso2index.info/assets/FinalSO2Exposurelevels.pdf) uses a six-tiered color-coded system to depict sulfur dioxide (SO2) concentrations and provide guidance for different groups of people exposed to SO2.
Title: Bats in the West: Discoveries, Questions, and Future Research
By Gabriel A. Reyes, USGS Biologist
Title: Bats in the West: Discoveries, Questions, and Future Research
By Gabriel A. Reyes, USGS Biologist
Scientists collected marine vibracores from a research vessel in Mississippi Sound to study shelf geology as part of a collaboration between Mississippi State University and the USGS St. Petersburg Coastal and Marine Science Center.
Scientists collected marine vibracores from a research vessel in Mississippi Sound to study shelf geology as part of a collaboration between Mississippi State University and the USGS St. Petersburg Coastal and Marine Science Center.
Cykl Hydrologiczny, The Natural Water Cycle, Polish
Czym jest cykl hydrologiczny?
Cykl Hydrologiczny, The Natural Water Cycle, Polish
Czym jest cykl hydrologiczny?
Looking upstream at the Delaware River at Montique (01438500) USGS gage house tower.
Looking upstream at the Delaware River at Montique (01438500) USGS gage house tower.
Still image from November 1, 2019, YVO video monthly update.
Still image from November 1, 2019, YVO video monthly update.
Stream gaging in Puerto Rico after Tropical Storm Karen: finishing the visit – Manuel Rosario, with the Caribbean-Florida Water Science Center, walks to the gage house after completing a discharge measurement September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: finishing the visit – Manuel Rosario, with the Caribbean-Florida Water Science Center, walks to the gage house after completing a discharge measurement September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: computing gage height – Manual Rosario does some math required to compute the gage height September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: computing gage height – Manual Rosario does some math required to compute the gage height September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: Crest Stage Gage – The distance of a cork line from a known gage height is measured September 25. The cork line was left on a crest stage gage after a high flow event.
Stream gaging in Puerto Rico after Tropical Storm Karen: Crest Stage Gage – The distance of a cork line from a known gage height is measured September 25. The cork line was left on a crest stage gage after a high flow event.
Stream gaging in Puerto Rico after Tropical Storm Karen: downstream control – The pool pictured is almost twice it’s normal size and depth after Tropical Storm Karen passed the island, September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: downstream control – The pool pictured is almost twice it’s normal size and depth after Tropical Storm Karen passed the island, September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: recording gage height – A ding-wop, a weight attached to measuring devices, was used to measure the gage height, September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: recording gage height – A ding-wop, a weight attached to measuring devices, was used to measure the gage height, September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: staging the measurement – Manuel Rosario, with the Caribbean-Florida Water Science Center, stages an acoustic Doppler current profiler (ADCP) to measure high flow September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: staging the measurement – Manuel Rosario, with the Caribbean-Florida Water Science Center, stages an acoustic Doppler current profiler (ADCP) to measure high flow September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: computer – Gage height and precipitation data recorded by sensors and measured manually are logged into an electronic notebook, September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: computer – Gage height and precipitation data recorded by sensors and measured manually are logged into an electronic notebook, September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: Gage house – Manuel Rosario, with the Caribbean-Florida Water Science Center, checks the sensors in the gage house September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: Gage house – Manuel Rosario, with the Caribbean-Florida Water Science Center, checks the sensors in the gage house September 25.
Stream gaging in Puerto Rico after Tropical Storm Karen: tethered ADCP – A tethered acoustic Doppler current profiler (ADCP) is pulled through a cross section of Rio de La Plata near Toa Alta, Puerto Rico, September 25, 2019.
Stream gaging in Puerto Rico after Tropical Storm Karen: tethered ADCP – A tethered acoustic Doppler current profiler (ADCP) is pulled through a cross section of Rio de La Plata near Toa Alta, Puerto Rico, September 25, 2019.
Vannets kretsløp, The Natural Water Cycle, Norwegian
Vannets kretsløp, The Natural Water Cycle, Norwegian
Two HVO geologists document road cutting activities on HWY 132 on August 7, 2019. One geologist is taking visual photographs while another geologist is taking thermal photographs to make a tandem pair for comparison. The temperature of the solidified lava was measured to 425 ° C (800 ° F) at the digging site. Photograph by USGS geologist K.
Two HVO geologists document road cutting activities on HWY 132 on August 7, 2019. One geologist is taking visual photographs while another geologist is taking thermal photographs to make a tandem pair for comparison. The temperature of the solidified lava was measured to 425 ° C (800 ° F) at the digging site. Photograph by USGS geologist K.
Tidal marshes exist as a transitional environment between the land and sea, and provides habitat to fish and wildlife, protects human developments from coastal flooding, and stores carbon at high density, among other important ecosystem services.
Tidal marshes exist as a transitional environment between the land and sea, and provides habitat to fish and wildlife, protects human developments from coastal flooding, and stores carbon at high density, among other important ecosystem services.
USGS scientist surveys water levels on the Delaware River while streamflow measurements are made by boat. These measurements help scientists understand the amount of water and constituents being transported by the river.
USGS scientist surveys water levels on the Delaware River while streamflow measurements are made by boat. These measurements help scientists understand the amount of water and constituents being transported by the river.
Cover of 2019 Energy and Wildlife Research report.
Cover of 2019 Energy and Wildlife Research report.