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.

Data and Resources

Field Value
DOI 10.15121/1776598
accessLevel public
bureauCode {019:20}
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dataQuality true
identifier https://data.openei.org/submissions/3881
issued 2020-10-01T06:00:00Z
landingPage https://gdr.openei.org/submissions/1255
license https://creativecommons.org/licenses/by/4.0/
modified 2022-02-21T17:56:56Z
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programCode {019:006}
projectLead Lauren Boyd
projectNumber EE0007080
projectTitle Utah FORGE
publisher Energy and Geoscience Institute at the University of Utah
resource-type Dataset
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • egs
  • energy
  • fea
  • fem
  • finite-element
  • forge
  • geo
  • geodesy
  • geophysical-data
  • geophysics
  • geoss
  • geothermal
  • gravity
  • magnetics
  • magnetotelluric-data
  • magnetotellurics
  • milford
  • mt-data
  • national
  • north-america
  • roosevelt-hot-springs
  • seismic
  • site-characterization
  • united-states
  • utah-forge
  • utah-forge-mt
  • utah-geothermal
isopen True
license_id cc-by
license_title Creative Commons Attribution
license_url http://www.opendefinition.org/licenses/cc-by
maintainer Phil Wannamaker
maintainer_email pewanna@egi.utah.edu
metadata_created 2025-11-21T09:04:23.133700
metadata_modified 2025-11-21T09:04:23.133704
notes 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.
num_resources 5
num_tags 30
title Utah FORGE: Phase 3 Magnetotelluric (MT) Data