Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Patent
1980-01-07
1982-09-14
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
By magnetic means
324248, 324350, G01V 326, G01R 33035
Patent
active
043497810
ABSTRACT:
A subsurface electromagnetic sensing device for use in boreholes and mine shafts which includes a sonde for lowering underground which is supercooled and contains Squid gradiometers for measuring vector current density, and magnetometers for measuring vector magnetic fields. When these measured values are combined, information is obtained to construct a conductivity model of the underlying and surrounding subsurface region.
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patent: 3982176 (1976-09-01), Meador
patent: 3993944 (1976-11-01), Meador et al.
Fraser-Smith, A.C., "Geophys. App. of Superconducting . . . Gradiometers" Geophysics, vol. 41, No. 2, Apr. 1976.
Wynn et al., "Advanced Superconducting Gradiometer/Magnetometer Arrays . . . ", IEEE Trans. on Magnetics, vol. MAG-11, No. 2, Mar. 1975, pp. 701-707.
Vozoff, Keeva, The Magnetotelluric Method in the Exploration of Sedimentary Basins, Geophysics, vol. 37, No. 1, Feb. 1972, pp. 98-141.
Strecker Gerard R.
The Regents of the University of California
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