USGS has unveiled its most detailed national geologic map, giving the public a free, interactive way to explore underground features. Here’s how to use it.

In what the agency hopes will spur a major leap in American geoscience, the U.S. Geological Survey has released a new mapping tool that allows anyone to peer into the earth beneath their feet. Dubbed ...

The 5.8-magnitude earthquake that hit Lincoln, Montana on Thursday was the area’s strongest in 60 years. The tremors from this quake stretched for hundreds of miles across the state, and residents as ...