Computer Modeling of the Strike Effects on MagnetoTelluric Data from 2 D Earth Under the Equatorial Electrojet

It is well known that the Equatorial Electrojet (EEl) currents are a source of perturbations on I-D Magnetotelluric long period data (Hermance &Peltier, 1970; Peltier & Hermance, 1971; Rijo, 1991; Rijo, 1993). For the simple case of 2-D geological structures parallel to the E-W direction of the equatorial electrojet, this phenomenon is well documented in the literature (Mota & Rijo, 1992). However, the strike of 2-D geological structures are not always restricted to E-W direction, thus it is appropriate to investigate the general situation of structures having arbitrary orientations with respect to the EEl direction.