A geomagnetic depth sounding profile in the western Cordillera has revealed concentrations of electric current related to the tectonics of the region. The east-west profile at approximately 46¿30'N extends from the coast to just east of the Cascade volcanic belt. In the western region of the profile the geomagnetic coast effect at a 50-min period was similar to results in other tectonically active areas such as California and southeastern Australia. Stations near the Cascade volcanic zone had anomalous response functions; a clearcut reversal in both the in-phase and quadrature components was observed in the direction of the induction arrows across the zone. Based on the similarity between the ayalyzed data curves and the response of a line current model, the anomaly can be approximated by a long, narrow conductor trending nort-south in direction. This conductive zone does not extend as far north as a profile previously measured in southern British Columbia.