Results 1 - 3 of 3

• Three Dimensional Microseismic Monitoring of a Utah Longwall
  7/1/2001 - Conference papers
  In Utah, 3-D, full waveform, autonomous microseismic arrays were placed underground and on the surface of a longwall coal mine with overburden exceeding 750 m. Overall 13,000 seismic events, including a magnitude 4.2 event, were detected and located.
• Surface Magnetic Field Noise Measurements at Geneva Mine
  9/1/1974 - Contract reports
  Measurements of surface magnetic field noise were made at various locations over the Geneva Coal Mine near Price, Utah, on June 12, 1973. Results of measurements of distant sferics indicate rather sharp cutoff frequencies below which broadband, impulsiv...
• EM Location System Prototype and Communication Station Modification
  7/1/1973 - Contract reports
  A prototype electromagnetic (em) location system consisting of six miniature transmitters, six miniature receivers, and one multichannel receiver was developed by Westinghouse Georesearch Laboratory and is described in this report.