Application of sensitivity patterns to inversion of magnetotelluric field data in Utah for selecting optimal input

Abstract

Many different MT response functions such as the impedance and tipper which are converted from measured electromagnetic fields to remove the effects of natural sources have been proposed and studied. To obtain good inversion results, it is important to know that the inversion results depend on the sensitivity patterns of the MT response functions used as the input, indicating parts to which the MT responses are sensitive. We introduce how to use the sensitivity patterns to determine optimal input MT response functions for interpreting field data. For MT field data, we use the data acquired at the Utah Frontier Observatory for Research in Geothermal Energy (FORGE) survey area. The target structure in the Utah FORGE survey area is associated with geothermal energy, and most of the sites are located to the left of the target structure. Examining the sensitivity patterns of the majorThis article is protected by copyright. All rights reserved