Utah FORGE: Phase 3 Magnetotelluric (MT) Data


New high-quality tensor MT data at 122 sites, including the vertical magnetic field and utilizing ultra-remote referencing, have been acquired over the Utah FORGE project area. The results will be used to delineate the densities of faults and fractures in crystalline basement rocks, to define the heat sources, and to derive baseline 3D resistivity structure for later MT monitoring of temporal changes in resistivity structure following well stimulation in the EGS reservoir.

There are three files here related to Utah FORGE magnetotelluric (MT) data acquisition and processing. The FORGE MT EDIs zip file contains the observed MT responses in industry-standard EDI format. For each site, there is an EDI response file that utilized a local independent reference for noise cancellation, and a file that utilized a distant reference cancelling noise associated with the DC transmission line of the Delta IPP passing down the west side of Milford Valley. These two site files could be merged as appropriate.

The FORGE Model Cell Center file contains the model volume of the 3D Forge MT inversion for characterizing the resistivity structure in the project area. It was derived using finite element inversion methodology described in Wannamaker et al, in the attached FORGE Phase3 Geophysics paper, from the MT observation EDI files. It is ASCII format (.dat) and entries are defined at top of the file in a simple x-y-z-Rho listing in UTM coordinates. The element layers drape the topography so the Rho value layers are not purely horizontal slices. This greatly simplifies the listing.

3 Resources

*downloads since 2019

Related Datasets

Datasets associated with the same DOE project
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Additional Info

DOE Project Name: Utah FORGE
DOE Project Number: EE0007080
DOE Project Lead: Lauren Boyd
DOI: 10.15121/1776598
Last Updated: 7 months ago
Data from October, 2020
Submitted Oct 7, 2020


Energy and Geoscience Institute at the University of Utah



Publicly accessible License 


Phil Wannamaker
Energy and Geoscience Institute at the University of Utah
Virginia Maris
Energy and Geoscience Institute at the University of Utah


geothermal, energy, Utah FORGE MT, MT data, Magnetotelluric data, Utah FORGE, FORGE, Utah Geothermal, geophysical data, finite element, FEA, FEM, geophysics, gravity, magnetics, magnetotellurics, seismic, geodesy, EGS, Roosevelt Hot Springs, Milford, site characterization


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