Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BluefieldM/R-D121.92 m 9.66 km2,784 km
Bluegrass Area, KY/Pauducah Area, KY/ Hopkinsville Area, KY & TN/ Owensboro Area, KY/ Paradise-Russellville Area, KY & TN/ Louisville, KY/ Burskville-Somerset Area, KY & TN/ Ashland-Hazard Area, KY/ Cincinnatis Area, KYM-D152.4 m above ground1.61 km67,633 km
Southwest VirginiaM-Dz1524 m (barometer)2.41 km4,828 km
Southern West VirginiaM-Dz304.8 m above ground3.22 km6,804 km