Open AccessThe pole‐tide signal in the geomagnetic field at a low‐latitude station
Author(s) -
Rao D. R. K.,
Rangarajan G. K.
Publication year - 1978
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.1978.tb03763.x
Subject(s) - earth's magnetic field , dynamo , geology , low latitude , latitude , amplitude , geophysics , signal (programming language) , geodesy , magnetic field , atmospheric sciences , climatology , physics , quantum mechanics , computer science , programming language
summary . The equilibrium pole‐tide's signal is identified at a period around 14.22 month (427 day) in geomagnetic elements H and Z at a low‐latitude coastal station, Alibag, in the Indian region. The signal however, could not be detected clearly in the element D . Consistent amplitudes and phases, over the hours, of this tide in H spectra of both‘all days’and‘IQ days’indicate that the origin of the tide in the geomagnetic field cannot be due to modulation of an external current system. It is suggested that the probable source of excitation may be the‘ocean dynamo’.