North American Craton

Tracking recent earthquakes in North America that seem to draw a line that resembles the North American Craton (a long forgotten tectonic plate).


After months of not posting about the NA Craton it is still very active.
You can see the NA Craton line still being drawn in late January ’12.


http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/us2012wsaz.php

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