Large Scale Three Dimensional Inversion of Earthscope Mt Data Using the Integral Equation Method

EarthScope is the United States Earth Science Pro gram to explore the structure and evolution of the North American continent and understand processes control ling earthquakes and volcanoes. A major part of the EarthScope project is the Transportable Array which will be deployed over the next decade over the entire continental United States. This Transportable Array will provide an unparalleled means to study the geology of the United States. through seismology and other geo physical data. EMScope is the magnetotelluric compo nent of the National Science Foundation’s EarthScope USArray program. The MT Transportable Array com prises shorter period investigations at hundreds of sites in the continental United States. By the end of 2009 MT data had been collected from 262 stations located throughout Oregon, Washington, Idaho, and most of Montana and Wyoming, 139 of which were used in this analysis (Fig. 1). LARGE SCALE THREE DIMENSIONAL INVERSION OF EARTHSCOPE MT DATA USING THE INTEGRAL EQUATION METHOD