Geomagnetic induction studies in Scandinavia. III. Magnetotelluric observations

Data from 2 of the instruments of the Munster International Magnetospheric Study Scandinavian Magnetometer Array are combined with synoptic telluric field measurements, and the joint data sets are analysed to derive the magnetotelluric response functions for the locations. The data analysis procedures employed, particularly the timing error correction technique, are described in detail. One-dimensional interpretations of the response functions, from both the N Swedish and the S Finnish location, are shown to be valid. Both first-approximation continuous models and more comprehensive layered-earth models-found by a Monte-Carlo search procedure-acceptable to the response functions are illustrated.- from Authors