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Welcome to the USGS — Your source for
science you can use
As an unbiased, multi-disciplinary science organization
that focuses on biology, geography, geology, geospatial
information, and water, we are
dedicated to the timely, relevant, and impartial study of the landscape,
our natural resources, and the natural hazards that threaten us.
Fewer Days of Ice on Northern New England Rivers in Recent Years
Many long-time New England residents think winter just isn´t what it used to be and mounting evidence from a series of USGS studies suggests they’re right. The total number of days of ice on the region’s rivers has declined significantly in recent decades and particularly in the spring.
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Watershed Approach to Cleaning Up Historical Mines in Boulder River Basin
Acid drainage and toxic metals are a legacy of mining in many mountain watersheds throughout the western United States. The results of recent studies by USGS scientists on the effects of these substances on the water quality and aquatic life in the Boulder River Basin have recently been released.
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1906: The Most Catastrophic Earthquake in U.S. History…So Far
The magnitude 7.9 earthquake that ruptured the San Andreas Fault in the early morning hours of April 18, 1906, marked the birth of modern earthquake science. For the first time, the effects and impacts of a major seismic event were systematically investigated and documented including mapping the entire 200-mile-long surface break and establishing the San Andreas as a major geologic feature extending nearly the length of California. We now know that a repeat of the 1906 earthquake is only one of a wide number of future major damaging earthquakes likely to impact the Bay Area.
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Nearly 70 percent of the Earth's fresh-water supply is locked up in the icecaps of Antarctica and Greenland. The remaining fresh-water supply exists in the atmosphere, streams, lakes, or groundwater and accounts for 1 percent of the Earth's total water supply.
