Scientists look at deep earthquake signals to map how seismic waves lose energy in the upper mantle across the United States.
United States
Posted inNews
United States Still First in Science, Tech Research Spending
Although federal funding of science and engineering research has fallen behind inflation, private sector investment remains high, reports the U.S. National Science Board in its latest update.
Posted inNews
Special Delivery: Post Office to Issue Space-Themed Stamps
Letter writers will be able to adorn their envelopes this year with full-disk images of the planets, Pluto, and the full Moon, as well as Star Trek icons.
Posted inNews
Experts Urge Europe and the U.S. to Boost Cooperation in Space
By working more closely together, these major space players could better monitor weather and natural hazards, improve communications and satellite security, and extend international cooperation.
Posted inNews
Despite Stalled Regulations, U.S. Mercury Emissions Decline
Newly published measurements made downwind of West Virginia, Pennsylvania, and Ohio coal-burning plants reveal steep, unexpected drops in atmospheric mercury concentrations since 2006.
Posted inNews
U.S. Climate Change Negotiator Says Time Is Right for a Deal
With the United Nations climate change conference imminent, the U.S. special envoy for climate change optimistically outlined what sort of agreement could drive the transition to a low-carbon world.
Posted inResearch Spotlights
Aftershocks of Old Quakes Still Shake New Madrid Seismic Zone
Geodetic data show that earthquakes in 1450 and 1811–1812 may be responsible for present-day seismic activity in the region.
Posted inScience Updates
Agencies Collaborate, Develop a Cyanobacteria Assessment Network
An integrated, holistic approach to detecting and characterizing cyanobacteria blooms could reduce human health risks and better direct field resources.
Posted inResearch Spotlights
Hydraulic Fracturing Water Use Is Tied to Environmental Impact
New map identifies varying water usage in hydraulic drilling operations across the United States and what this means for potential environmental impacts.
Posted inResearch Spotlights
How Long Is a Bolt of Lightning?
Better calculations of bolt length could help quantify how much climate-changing nitrogen oxide gas is made when lightning strikes.