Unified Interior Regions
Arizona
The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.
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Pigeon Canyon in northern Arizona
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.
The Sonoran Desert of the Barry M. Goldwater Range in Arizona
A distressed desert in the Sonoran Desert of the Barry M. Goldwater Range in Arizona
Boundary Monument 75E, Southeastern Arizona - 2009
An anti-vehicle barricade has been constructed across this section of the international boundary. Grass cover has increased in the foreground, providing evidence of the site’s grassland connection. (Raymond M. Turner)
WERC A Silky Flycatcher with a Mistletoe Berry
A female silky flycatcher with a mistletoe berry in her beak. These flycatchers are intimately tied to mistletoe. They build their beautiful cup nests (much like a large hummingbird nest) within the mistletoe, or nearby. The young hatch during February when the mistletoe may be in flower and supply a rich source of insect nutrients for growing young. The rest of the year,
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Grand Canyon sand
Grand Canyon sand was photographed with a hand-held point-and-shoot camera in a waterproof housing.
Havasu Creek Flood Damage (2008)
USGS staff evaluates flood damage caused by the recent Havasu Creek Flood, August 2008.
Streamflow Measurement (2008)
USGS streamgagers make a discharge measurement in southwest Arizona.
Flood Measurement in Tucson, AZ (2008)
Footage of USGS streamgagers taking measurements on the Santa Cruz River in Arizona.
Streamflow Measurement (San Pedro River - 2008)
USGS streamgagers make a low flow measurement on the San Pedro River at Charleston.
View of sandbar on Colorado River at River Mile 65
View of reattachment sandbar located near the Carbon Creek drainage on Colorado River (River Mile 65). Photo is from the long-term sandbar monitoring remote camera time-series archives, and shows the sandbar two months after the 2008 Spring High Flow Event.
Sandbar on the Colorado River in Grand Canyon
Sandbar on the Colorado River in Grand Canyon deposited by 2008 controlled flood. The river is flowing from left to right and the location is approximately 64 miles downstream from Lees Ferry, Arizona.
Sandbar on the Colorado River in Grand Canyon
Sandbar on the Colorado River in Grand Canyon deposited by the 2008 controlled flood. The view is looking downstream and the location is approximately 65 miles downstream from Lees Ferry, Arizona.
One of every four fishes in streams of 12 western states is non-native, according to a U.S. Geological Survey (USGS) study published in November 2005 in the North American Journal of Fisheries Management.
One of every four fishes in streams of 12 western states is non-native, according to a U.S. Geological Survey (USGS) study published in November 2005 in the North American Journal of Fisheries Management. And, researchers found, it´s not just that there are a lot of non-native fishes but they are also widespread...
What are the issues desert tortoises face, and what has been learned and accomplished?
A symposium that focuses on the issues, research and management of the desert tortoise in the deserts of the southwestern United States and Mexico.
Ensuring stable water supplies has grown more complex as the challenges facing water managers continue to mount, especially in the West. Informed decisions of water users and public officials will be necessary to ensure sufficient freshwater resources in the future to support a growing population and economy.
Today, the USGS released The State of the Colorado River Ecosystem in Grand Canyon, a comprehensive report that details the impacts of the operation of Glen Canyon Dam and other management actions on downstream resources within Grand Canyon National Park.
Today, the USGS released The State of the Colorado River Ecosystem in Grand Canyon, a comprehensive report that details the impacts of the operation of Glen Canyon Dam and other management actions on downstream resources within Grand Canyon National Park.
A new U.S. Geological Survey (USGS) report estimates that 15 to 20 percent of average annual recharge to aquifers occurs along the normally dry (ephemeral-flow) washes in the Sierra Vista area.
A new U.S. Geological Survey (USGS) report estimates that 15 to 20 percent of average annual recharge to aquifers occurs along the normally dry (ephemeral-flow) washes in the Sierra Vista area.
In its latest report on water use in the United States, the USGS looked at the nation's dependence on ground water. The report entitled Estimated Withdrawals from Principal Aquifers in the United States, 2000, provides details of ground-water withdrawals and use from principal aquifers in each state.
The USGS’s Grand Canyon Monitoring and Research Center (GCMRC), under the auspices of the Glen Canyon Dam Adaptive Management Program, will conduct scientific overflights in Grand Canyon National Park over Memorial Day weekend.
The USGS’s Grand Canyon Monitoring and Research Center (GCMRC), under the auspices of the Glen Canyon Dam Adaptive Management Program, will conduct scientific overflights in Grand Canyon National Park over Memorial Day weekend.
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Locations
Astrogeology Science Center
Phone: 928-556-7000
Fax: 928-556-7014
Southwest Biological Science Center - Flagstaff, AZ, Headquarters
Phone: 928-556-7094
Fax: 928-556-7092
Southwest Climate Adaptation Science Center
Western Geographic Science Center - Tucson Project Office
Western Geographic Science Center - Flagstaff Project Office
Arizona Water Science Center, Tucson Office
Phone: (520) 670-6671
Fax: (520) 670-5592
Yellowstone Volcano Observatory (YVO)
yvowebteam@usgs.gov
Phone: 360-993-8906
Southwest Biological Science Center - Tucson, AZ, Research Station
Phone: (520) 670-6671
Fax: (520) 670-5592
Arizona Water Science Center, Flagstaff Office
Phone: (928) 556-7136
Fax: (928) 556-7112
Arizona Water Science Center, Tempe Office
Phone: (480) 736-1093
Fax: (480) 736-1356
Arizona Water Science Center, Yuma Office
Phone: (928) 782-6024
Fax: (928) 782-0268