The 1980 Mount St. Helens eruption began with a steady series of earthquakes in March. By April it began spewing smoke, massive landslides on the north side of the mountain began, as a massive bulge a ...

The map is a fascinating representation of the protection geography and meteorology gives the millions of people who live in the mid-Atlantic region — especially in the Washington DC area.

The National Weather Service's sky cover map, updated this morning ... might completely block stargazers' views of the eclipse. In Washington state, the partial eclipse will begin at 10:09 ...

Dr. Ben Mirus and Dr. Francis Rengers with the U.S. Geological Survey have been using laser scans and GPS cameras, accurate down to one inch, to map out ... Center outside Washington, D.C ...