Accession Number : AD0428266


Title :   MAGNETOTELLURIC EVIDENCE FOR THE LOW VELOCITY LAYER,


Corporate Author : CALIFORNIA UNIV BERKELEY SPACE SCIENCES LAB


Personal Author(s) : Fournier,H G ; Ward,S H ; Morrison,H F


Report Date : 07 Nov 1963


Pagination or Media Count : 23


Abstract : The most complete soundings indicate a sharp decrease in electrical resistivity from about 10,000 ohm meters to about 50 ohm meters at a depth of the order of 70-80 km in the Earth. The soundings suggest that the resistivity increases again shortly thereafter to 1000 ohm meters and then finally decreases to 1 ohm meter at a depth which seems to vary from 300 to 1000 km. Using four and five layer models of the Crust and Mantle, families of theoretical magnetotelluric sounding curves are computed. From these families of theoretical curves, two curves which seem to be most representative of the average characteristics of the observed curves are found. (Author)


Descriptors :   *ELECTRICAL RESISTANCE , LITHOSPHERE , ELECTRIC CURRENT , GEOMAGNETISM


Distribution Statement : APPROVED FOR PUBLIC RELEASE