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    • Utah FORGE: Fluid Injection-Rate Controls on Seismic Moment from Laboratory Fault Reactivation Experiments

    Metadata Updated: October 10, 2025

    This dataset contains experimental and acoustic data from shear reactivation tests that investigate the relationship between fluid-injection rate, pore pressure distribution, and seismic moment during laboratory fault slip. It includes raw mechanical data and acoustic emission recordings from fifteen experiments performed on 2.5-3 inch granitoid cores from the Utah FORGE enhanced geothermal systems (EGS) site. Each sample contains a single inclined fracture with small-scale surface roughness.

    Experiments were conducted in an aluminum triaxial pressure vessel (TEMCO) equipped with three independently servo-controlled pumps using distilled water as the working fluid. The pumps regulated confining, upstream pore, and axial pressures, with each connected to a LabView interface to record applied pressures, cumulative injected volumes, and flow rates. The downstream outlet was closed to allow pressurization, monitored by an external pressure transducer. Axial displacement was measured by a linear variable differential transformer (LVDT) attached to the axial piston and converted to shear displacement along the fracture. Acoustic emissions were recorded using P-wave transducers, with event timing, amplitude, and cumulative amplitude compared against seismic moment and shear slip velocity.

    Fluid injection rates of 0.05, 0.25, and 0.75 mL/min were applied under constant shear stress conditions, with both uniform and non-uniform along-fault pressure distributions. Samples were fully saturated with deionized water. Axial and confining stresses were increased to 3 MPa in 500 kPa increments, while pore pressure was held at 200 kPa prior to initiating shear mobilization. Axial stress was then increased to induce shear slip and subsequently reduced to approximately 60%, 80%, or 90% of the peak shear stress, depending on the experiment. The raw mechanical data files include time-series measurements of confining, pore, and axial pressures; pump volumes and flow rates; time (in hours:minutes:seconds); axial displacement (in millimeters); and downstream pressure (in psi).

    Access & Use Information

    Public: This dataset is intended for public access and use. License: Creative Commons Attribution

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    Dates

    Metadata Created Date October 10, 2025
    Metadata Updated Date October 10, 2025

    Metadata Source

    Harvested from OpenEI data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date October 10, 2025
    Metadata Updated Date October 10, 2025
    Publisher Pennsylvania State University
    Maintainer
    Identifier https://data.openei.org/submissions/8548
    Data First Published 2025-09-16T06:00:00Z
    Data Last Modified 2025-10-09T17:35:47Z
    Public Access Level public
    Bureau Code 019:20
    Metadata Context https://openei.org/data.json
    Metadata Catalog ID https://openei.org/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Data Quality True
    Harvest Object Id 7152fbd4-1f6b-4832-ae41-6cf8db00b74e
    Harvest Source Id 7cbf9085-0290-4e9f-bec1-91653baeddfd
    Harvest Source Title OpenEI data.json
    Homepage URL https://gdr.openei.org/submissions/1775
    License https://creativecommons.org/licenses/by/4.0/
    Old Spatial {"type":"Polygon","coordinates":-112.916367,38.483935,-112.879748,38.483935,-112.879748,38.5148,-112.916367,38.5148,-112.916367,38.483935}
    Program Code 019:006
    Projectlead Lauren Boyd
    Projectnumber EE0007080
    Projecttitle Utah FORGE
    Source Datajson Identifier True
    Source Hash 3c722616e4555ea550ceed9b20e78853cd02d16a98cf163d434bfd3788fe8260
    Source Schema Version 1.1
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