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Nassau County
Official Seal of Nassau County, FL
96135 Nassau Place
Suite 1
Yulee, FL 32097
Seismic Monitoring

Nassau County is host to two EarthScope / USArray Earthquake Monitoring Stations.

Lofton Creek Landfill, Station 457A

Hilliard Site, Station 456A (private property)

EarthScope is the largest earth science experiment ever to learn more about how continents form and what causes earthquakes and volcanoes. Using the data collected from over 2,000 observatories across the United States, EarthScope will measure the geological motions responsible for creating our landscape.

The USArray program is a part of the overall EarthScope project. The USArray is a dense network of permanent and portable seismographs across the continental United States. The seismographs record local, regional, and distant (teleseismic) earthquakes. The data recorded by all these seismometers will allow scientists to develop the sharpest images yet of Earth’s interior. These images will help scientists to develop new ideas about how the North American continent formed and evolved.

For more information on EarthScope or USArray, please see EarthScope or USArray

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