Open AccessA comparison of Sq analyses with model calculations
Author(s) -
Hobbs B. A.
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.tb05965.x
Subject(s) - geophysics , geology , field (mathematics) , shell (structure) , magnetic field , physics , geodesy , computational physics , mathematics , materials science , quantum mechanics , pure mathematics , composite material
Summary. Three analyses of Sq are examined in detail. The analyses separate Sq into external and internal parts. The external part is used as an inducing field in a model earth consisting of a perfectly conducting inner sphere (con‐ductosphere) surrounded by a thin non‐uniformly conducting shell representing in some detail the distribution of oceans and continents. The calculated induced part is compared to the internal part deduced in the analysis. The comparison is poor and the reason is shown to be that the magnetic observatories are not located in regions influenced by the main induced oceanic currents. It is further shown that some Sq analyses are unacceptable on physical grounds.