Images

Sunset from the coastal Gulf of Alaska.

Stream at Great Falls, VA.

Lighting above absolutes pier at Deadhorse geomagnetic observatory.

More than 110 sinkholes formed in the Dover area of Florida during a freeze event in January 2010. Ground water levels dropped to record-setting lows as farmers pumped water to irrigate their plants for protection from the cold temperatures. The sinkholes destroyed homes, roads and sections of cultivated areas.

A sinkhole formed in a roadway caused traffic to detour around it while it is filled in, stabilized and repaved.

Cracking along exterior walls is a sign of subsidence activity. Such severe structural damage from sinkholes can destroy homes and other structures.

A large cooperative project is taking place with Olympic National Park in the Elwha River in anticipation of removal of two dams. Restoration of the entire river to natural free flows will allow returning salmon access to historic spawning grounds.

Sediment can smother corals, but Hurricane Hole has no sediment-bearing freshwater streams. Its clear waters are habitat for an entire community of marine life, including Montastrea corals and squirrelfish. Photo: Caroline Rogers, USGS, 2009

The former Pigeon Mine in northern Arizona is seen here looking towards the northeast.

Uranium levels in Pigeon Spring, just north of the Grand Canyon, are likely due to a natural source of uranium and not related to the nearby former Pigeon Mine, according to a recent study by the USGS.

Here, Pigeon Spring emerges in Pigeon Canyon just before it merges with Snake Gulch in northern Arizona. 

Uranium levels in Pigeon Spring, just north of the Grand Canyon, are likely due to a natural source of uranium and not related to the nearby former Pigeon Mine, according to a recent study by the USGS.

Choctawhatchee River and gage in late December flood looking downstream. 

Wright's Creek gage and flood. 

An aerial view looking north at two active areas of Kīlauea. Pu`u `Ō `ō crater is in the foreground, Mauna Loa (left) and Mauna Kea (right) are in the background. The fume source near the base of Mauna Loa (at Kīlauea's summit) is from the Halema`uma`u Overlook vent.

Tracking/monitoring movement of juvenile salmonids implanted with radio transmitters as they migrate down the Columbia River to the ocean.

This large rock at the Kīlauea Overlook in Hawai‘i Volcanoes National Park was ejected ballistically in 1790, or soon thereafter, from Kilauea Volcano's summit caldera when it was more than 600 meters (2000 feet) deep.

USGS employees release radio-tagged salmon smolts into the Columbia River below the sluiceway outfall at The Dalles Dam.

The seedlings of Red Mangrove trees germinate from fruits while still attached to the trees. Here many are growing within the roots of adult trees.

Red Hill Bay Marina exposed playa near the Salton Sea, California.

Red Hill Bay Marina, Salton Sea, California.

A geothermal power plant at The Geysers near Santa Rosa, California. The USGS researches and assesses geothermal resources.

Native copper. The USGS studies processes that form copper deposits and reports global production and consumption.