Monday, January 23rd, 2012
A pioneering airborne electromagnetic survey in the Yukon Flats near Fort Yukon, Alaska, by the U.S. Geological Survey has yielded unprecedented images of the presence and absence of permafrost to depths of roughly 328 feet. The airborne survey captured images of permafrost over a substantially larger area, and with greater data density, than has been
Tuesday, January 10th, 2012
OrbView-3 satellite images collected around the world between 2003 and 2007 by Orbital Imaging Corporation (now GeoEye) at up to one-meter resolution can now be downloaded at no cost through USGS EarthExplorer.
Sunday, January 8th, 2012
On its way to deliver emergency fuel to Nome, Alaska, the Russian tanker Renda will move through an area used by wintering spectacled eiders, a federally threatened sea duck. But, to protect the ducks and their wintering habitat, resource managers from the U.S. Fish and Wildlife Service and navigators from the U.S. Coast Guard are using satellite telemetry information from the U.S. Geological Survey to plot a
Friday, November 18th, 2011
The U.S. Geological Survey (USGS) has stopped acquiring images from the 27-year-old Landsat 5 Earth observation satellite due to a rapidly degrading electronic component.
Wednesday, November 9th, 2011
Nearly 124,000 high resolution scans of the more than 200,000 historical USGS topographic maps, some dating as far back as 1884, are now available online. The Historical Topographic Map Collection includes published U.S. maps of all scales and editions, and are offered as a georeferenced digital download or as a scanned print from the USGS
Wednesday, October 26th, 2011
A United Nations group established to preserve humanity’s documentary history has selected a portion of the U.S. Geological Survey (USGS) Landsat archive of Earth imagery to be added to the Memory of the World International Register. The continuous data record reveals both gradual change, as in glacier movement or coastline erosion, and sudden change, as in
Tuesday, October 25th, 2011
Only one of four large regions of the United States showed a significant relationship between carbon dioxide (CO2) in the atmosphere and the size of floods over the last 100 years. This was in the southwestern region, where floods have become smaller as CO2 has increased.
Tuesday, October 25th, 2011
Rivers and streams in the United States are releasing substantially more carbon dioxide into the atmosphere than previously thought. These findings could change the way scientists model the movement of carbon between land, water, and the atmosphere. The findings were recently published in a Nature Geoscience article entitled “Significant efflux of carbon dioxide from streams
Tuesday, September 27th, 2011
The fall season is perfect for taking a walk or a drive to see the beautiful leaves changing colors from green to red, orange and yellow. As climate changes, it affects the timing of when leaves emerge, the amount of foliage that grows as well as the timeframe when leaves begin to fall. The study
Wednesday, September 21st, 2011
This document defines a U.S. Geological Survey (USGS) digital topographic map. This map series, named “US Topo,” is modeled on what is referred to as the standard USGS 7.5-minute (1:24,000-scale) topographic map series that was created during the period from 1947 to approximately 1992. The US Topo map product has the same extent, scale, and
