Earthquakes

DYFI: Did You Feel It Mapping from USGS

The United States Geologic Survey (USGS) collects information from people who felt an earthquake and creates maps that show what people experienced and the extent of damage. The lowest level M 2.5 is the base point for what is likely to be noticed by humans.The archive maps here date back to 1999 for the nation and show a wide spread of active spots.

Locally we have had more quakes than you might have expected. Our region along and east of the Appalachian mountains contains a lot of old fault lines. The mountain range is the oldest in the world and thanks to the forces that created them at one time was higher than the Himalayas.

Two active locations have been in central VA and Lancaster County, PA. In fact, Lancaster County gets more quakes than the rest of Pennsylvania and is responsible for many tremors reaching into central Maryland.