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Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September of 2010 after the last of the sea ice dissipated.
Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September of 2010 after the last of the sea ice dissipated.
U.S.
Supergene chrysocolla zone in the Ray porphyry copper mine.
Supergene chrysocolla zone in the Ray porphyry copper mine.
Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September of 2010 after the last of the sea ice dissipated.
Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September of 2010 after the last of the sea ice dissipated.
Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September of 2010 after the last of the sea ice dissipated.
Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September of 2010 after the last of the sea ice dissipated.
A scene at the edge of a suburban housing development and farmland in Frederick County, Maryland.
A scene at the edge of a suburban housing development and farmland in Frederick County, Maryland.
USGS Research Hydrologist Art Horowitz and USGS Oklahoma Water Science Center Hydrologic Technician Ernie Smith describe streambed sediment collection devices for a Tribal training class at the Canadian River, Norman, Oklahoma.
USGS Research Hydrologist Art Horowitz and USGS Oklahoma Water Science Center Hydrologic Technician Ernie Smith describe streambed sediment collection devices for a Tribal training class at the Canadian River, Norman, Oklahoma.
John Byrnes of the USGS office in Troy, NY collecting a Hurricane Irene sample at the Mohawk River at Cohoes on August 29, 2010. As Hurricane Irene left her mark along the East Coast, USGS crews sampled water for pesticides, E. coli, nutrients, and sediment to document water quality in areas affected by the hurricane.
John Byrnes of the USGS office in Troy, NY collecting a Hurricane Irene sample at the Mohawk River at Cohoes on August 29, 2010. As Hurricane Irene left her mark along the East Coast, USGS crews sampled water for pesticides, E. coli, nutrients, and sediment to document water quality in areas affected by the hurricane.
Drought- and bark-beetle–induced mortality in high-elevation whitebark pine (Pinus albicaulis) forests, northern Warner Mountains (Drake Peak), Oregon.
Drought- and bark-beetle–induced mortality in high-elevation whitebark pine (Pinus albicaulis) forests, northern Warner Mountains (Drake Peak), Oregon.
Little Missouri River at Marmarth, North Dakota, streamflow 65.5 cubic feet per second.
Little Missouri River at Marmarth, North Dakota, streamflow 65.5 cubic feet per second.
Little Missouri River at Marmarth, North Dakota, streamflow 65.5 cubic feet per second.
Little Missouri River at Marmarth, North Dakota, streamflow 65.5 cubic feet per second.
The Barrow magnetic observatory. New combo building is on the left. Old absolutes building in the center.
The Barrow magnetic observatory. New combo building is on the left. Old absolutes building in the center.
Turtle River at Turtle River State Park near Arvilla, North Dakota, shot of the riffle (towards center of picture, about 700 feet downstream) looking downstream, streamflow 14 cubic feet per second, August 19, 2010.
Turtle River at Turtle River State Park near Arvilla, North Dakota, shot of the riffle (towards center of picture, about 700 feet downstream) looking downstream, streamflow 14 cubic feet per second, August 19, 2010.
The Golden Geomagnetic crew in Barrow, Alaska.
The Golden Geomagnetic crew in Barrow, Alaska.
Red mangrove trees fringe the shoreline of a bay in Hurricane Hole.
Red mangrove trees fringe the shoreline of a bay in Hurricane Hole.
Some of the thick volcanic deposits at Okmok that are being studied to reconstruct the sequence of events during the 2008 eruption. Photo taken on August 6, 2010 by Dr. Ort.
Some of the thick volcanic deposits at Okmok that are being studied to reconstruct the sequence of events during the 2008 eruption. Photo taken on August 6, 2010 by Dr. Ort.
Birds found in and around the Salton Sea, California.
Birds found in and around the Salton Sea, California.
GOES antenna at Deadhorse geomagnetic observatory.
GOES antenna at Deadhorse geomagnetic observatory.
Main building at Deadhorse geomagnetic observatory.
Main building at Deadhorse geomagnetic observatory.
Waterfowl in California can spread the avian influenza virus (AIv) during summertime when wetland temperatures are warm and waterfowl densities are low.
Waterfowl in California can spread the avian influenza virus (AIv) during summertime when wetland temperatures are warm and waterfowl densities are low.
Absolutes pier at Deadhorse geomagnetic observatory.
Absolutes pier at Deadhorse geomagnetic observatory.