Open AccessA geomagnetic study of the Great Glen Fault
Author(s) -
Kirkwood S. C.,
Mutton V. R. S.,
Sik J.
Publication year - 1981
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1981.tb04886.x
Subject(s) - geology , current (fluid) , fault (geology) , earth's magnetic field , magnitude (astronomy) , range (aeronautics) , seismology , san andreas fault , line (geometry) , geophysics , geodesy , oceanography , geometry , magnetic field , physics , materials science , mathematics , quantum mechanics , astronomy , composite material
Summary. An attempt is made to determine the range of two‐dimensional current models consistent with the measured magnetovariational response, for periods from 5–30 min, near the Great Glen Fault in northern Scotland. All current models must be symmetric about the fault line but, because of uncertainty about the magnitude of the ocean effect, models ranging from a line current at 80 km depth to a uniform current sheet, 60 km wide, at 10 km depth are equally acceptable. Comparison with other geophysical studies of the same area suggests that a suitable conducting zone is unlikely to be present at shallow depths and interpretation in terms of a conducting zone in the 20–80 km depth range is favoured, although no such zone has been resolved by the other studies.