Long-period EarthScope-style magnetotelluric survey of southwestern United States, carried out through a cooperative agreement between the Incorporated Research Institutions for Seismology (IRIS) and Oregon State University (OSU). These efforts were funded by NASA through grant #80NSSC19K0232.
Land permitting, data acquisition, quality control, and field processing were carried out by Green Geophysics with project management and instrument/engineering support from IRIS/OSU and Chaytus Engineering, respectively.