Paleomagnetic projects in Northeast USA and Quebec, Canada include many examples where Applied Paleomagnetics provided paleomagnetic services to petroleum and geotechnical companies since 1986. Our paleomagnetic projects in Northeast USA and Quebec, Canada emphasized paleomagnetic core orientation to determine natural fracture, bedding, and in situ stress orientations in oil and gas fields. In the Illinois Basin, our paleomagnetic projects focused on paleomagnetic core orientation in the St. Genevieve and Aux Vases formations. In the Michigan Basin, we conducted paleomagnetic orientation of Antrim Shale cores. In Quebec, Canada, our projects focused on paleomagnetic orientation of natural fractures in the Beekmantown Group at the Saint Flavien natural gas field, where understanding fractures is critical for underground gas storage ( UGS ). The goals of our paleomagnetic core orientation projects in Northeast USA and Quebec, Canada, were paleomagnetic orientation of natural fractures and in situ stress to constrain optimum trajectories for deviated and horizontal wells. In New York State, our paleomagnetic projects involved magnetostratigraphic and tectonic studies of Cambrian, Ordovician, Silurian, and Devonian carbonates and clastics to refine the North American apparent polar wander path for the Lower Paleozoic.