The U.S. Geological Survey provides an interactive fault map that allows users to magnify areas that have experienced tectonic activity. Various colors indicate the ages of fault lines, such as red for faults less than 150 years old and yellow for faults less than 15,000 years old.
Individuals can click on a particular fault line to view more information about the seismic zone. Zooming into an area creates a more detailed view of a particular locale and shows unique fault lines that can be seen with greater detail. Data on each fault line includes its location, technical measurements and average recurrence of major events along the fault.
Users are able to zoom in on the map by hitting the + button, and can zoom out with the - button visible on the screen. Individuals can click and drag the map in any direction by using the hand icon. Other elements of the fault line map include elevations, cities, towns, railroads and major highways.
The USGS database contains information on all faults capable of producing earthquakes magnitude 6.0 or greater on the Richter scale that have been active in the past 1.6 million years. Fault data is used to create hazard maps that illustrate where large earthquakes may occur in the future.