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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Filter Total Items: 225
Image: A Red-Faced Warbler in Arizona
May 1, 1998

A Red-Faced Warbler in Arizona

Red-faced warblers are one of the species affected by climate change in the form of reduced snowpack in the Arizona Mountains, according to a USGS Montana Cooperative Wildlife Research Unit study.

Attribution: Ecosystems
Image: Boundary Monument 75E, Southeastern Arizona - 1994
August 21, 1994

Boundary Monument 75E, Southeastern Arizona - 1994

During the past century, the grassland has continued to become more shrubby with increases in such plants as broom snakeweed and velvet mesquite. The mesquite, occurring here near the upper limits of its range, has remained short, probably as the result of catastrophic freezes that have visited the area. Bush muhly is found beneath some of the mesquites. (Raymond M  Turner

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Attribution: Land Resources
Colorized topography (GEDR) over the C3-MIDR mosaic.
June 23, 1993

Magellan Global C3-MDIR Colorized Topographic Mosaic

The original Magellan Compressed Mosaicked Image Data Record (C3-MIDR) archive contains three times compressed mosaics of image swaths (C-BIDRs) at a resolution of 2025 m/pixel. C3-MIDRs consist of mosaics generated by computing 3x3 pixel arithmetic moving averages from the C2-MIDRs. C3-MIDRs, with their 2.025 km pixel widths, are designed to cover the planet at reasonably

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February 19, 1993

Flash Floods: USGS Against the Water

A glimpse at the often dangerous task USGS employees make every year to obtain stream flow measurements from flood events.

February 19, 1993

Verde-Tangle Severe Flood 1993

This video documents two USGS employees taking a flood measurement during the most severe flood Arizona has seen in 100 years.

Image: Santa Catalina Highway, near Tucson, Southern Arizona - 1987
December 27, 1987

Santa Catalina Highway, near Tucson, Southern Arizona - 1987

This image was taken above the Santa Catalina Highway near mile 2.8 a few months after a fire burned across a south-facing slope. The saguaros are showing the effects of being scorched but are still standing. (Raymond M. Turner).

Attribution: Land Resources
Harrison Schmitt posing with the American Flag during the Apollo 17 mission
December 31, 1972

Harrison 'Jack' Schmitt with the American Flag and Earth (Apollo 17)

Harrison H. Schmitt during the Apollo 17 mission.

David Scott and James Irwin operating Grover
November 1, 1970

Apollo Grover Historical Photo: B1

James Irwin(left) and David Scott(right) training in the Lunar Roving Vehicle training version known also known as the "Grover"

Image: San Carlos River near Peridot, Southern Arizona - 1964
June 4, 1964

San Carlos River near Peridot, Southern Arizona - 1964

Riparian vegetation has increased to the extent of blocking the downstream view. The channel appears to have shifted to the right, and the terrace is now occupied by cottonwood, black willow, and tamarisk. (Raymond M. Turner).

Attribution: Land Resources
Image: Huérfano Butte, Santa Rita Experimental Range, Southern Arizona  - 1941
September 1, 1941

Huérfano Butte, Santa Rita Experimental Range, Southern Arizona - 1941

Members of the 1930s burrowed and cholla eruptions were visible in 1941 as well as new mesquite plants that were already quite large. (Photographer unknown).

Attribution: Land Resources
Image: San Carlos River near Peridot, Southern Arizona - 1940
March 21, 1940

San Carlos River near Peridot, Southern Arizona - 1940

In 1940, the gaging station for the San Carlos River was on a railroad bridge south of the little town of Peridot. This downstream view from that bridge shows the gage house on the extreme left and a safety railing next to it. The channel is wide following a flood, and scattered Frémont cottonwood trees are along channel right. The dense shrubs on the low terrace on the

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Attribution: Land Resources
Filter Total Items: 188
USGS
October 23, 2001

The natural richness of the Colorado Plateau of the southwestern United States is the focus of the Sixth Biennial Conference of Research on the Colorado Plateau, November 6-8, at the du Bois Conference Center on the campus of Northern Arizona University in Flagstaff, Ariz.

USGS
September 24, 2001

Geochemical analyses using strontium isotopes show that many of the timbers used to build the prehistoric great houses of Chaco Canyon, N.M., between A.D. 900 and 1150, were hand-carried to the building site from isolated mountaintops 50 to 60 miles away, according to four Arizona scientists.

USGS science for a changing world logo
April 23, 2001

The effect of low flows of the Colorado River, last summer, on fish, sand distribution, power production, recreation and other aspects of the river environment will be the focus of a Grand Canyon Science Symposium, April 26 and 27, at the Little America Hotel Conference Center in Flagstaff, Ariz.

USGS
April 23, 2001

The effect of low flows of the Colorado River, last summer, on fish, sand distribution, power production, recreation and other aspects of the river environment will be the focus of a Grand Canyon Science Symposium, April 26 and 27, at the Little America Hotel Conference Center in Flagstaff, Ariz.

USGS science for a changing world logo
April 18, 2001

Following the great 1906 San Francisco earthquake, a large number of distant aftershocks or triggered earthquakes occurred much farther away from the fault than previously realized, according to scientists at the U.S. Geological Survey.

USGS
April 18, 2001

Following the great 1906 San Francisco earthquake, a large number of distant aftershocks or triggered earthquakes occurred much farther away from the fault than previously realized, according to scientists at the U.S. Geological Survey.

USGS science for a changing world logo
March 14, 2001

The health and environment of desert tortoises will be the focus of the 26th Annual Meeting and Symposium of the Desert Tortoise Council, in Tucson, Ariz., March 16 through 19.

USGS
March 14, 2001

The health and environment of desert tortoises will be the focus of the 26th Annual Meeting and Symposium of the Desert Tortoise Council, in Tucson, Ariz., March 16 through 19.

USGS science for a changing world logo
February 23, 2001

A new U.S. Geological Survey (USGS) assessment of the nation’s coal resources shows abundant high quality, low-sulfur coal on federal and private lands in the Colorado Plateau region of Arizona, Colorado, New Mexico and Utah. The area is also home to vast quantities of coal bed methane gas - natural gas contained in coal.

USGS
March 29, 2000

Even as the Chiricahua leopard frog has disappeared from 80 percent of its former habitat, scientists, resource managers, ranchers, volunteer naturalists and even teachers and schoolchildren are striving to discover what is killing this frog and to sustain its populations in southeast Arizona until answers are found.

USGS
February 11, 2000

Following a competitive nation-wide search, Dr. Barry D. Gold has been named to head the Grand Canyon Monitoring and Research Center of the U.S. Department of the Interior, by Dr. Charles R. Groat, director of the U.S. Geological Survey.

USGS
November 5, 1999

Weather forecasts and the Southwestern environment will be highlighted Wednesday afternoon, November 10, as The U.S. Geological Survey and the National Weather Service (NWS) host an open house at their facilities in the Dennis DeConcini Environment and Natural Resources Building on the University of Arizona campus.