That light shaking you may have felt was an magnitude 4.1 earthquake near Greenback, Tennessee, in Blount County 29 miles south of Knoxville, multiple sources reported. The tremblor happened at 9:04 a ...

Z-Tipper Electromagnetic ("ZTEM") geophysical technique is a deep penetrating airborne method that measures relative resistivity contrasts in the sub-surface. This method has the ability to discern ...