Premium
On Diurnal Variation of Geomagnetic Pulsations Pc at M'Bour (West Africa)
Author(s) -
Barsczus Hans G.
Publication year - 1969
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs004i009p00873
Subject(s) - noon , sunrise , diurnal temperature variation , morning , earth's magnetic field , critical frequency , maxima , ionosphere , variation (astronomy) , atmospheric sciences , sunset , local time , diurnal cycle , geomagnetic latitude , physics , astrophysics , geophysics , magnetic field , astronomy , mathematics , art , statistics , quantum mechanics , performance art , art history
Six years of magnetic quick‐run records made at the low‐latitude M'Bour Observatory have been analyzed. It was found that the frequency of occurrence of pulsations Pc 3 and 4 presents a marked diurnal variation characterized by two principal maxima, at sunrise and around local noon. The curves of occurrence are compared with the diurnal variation of the critical frequency of the ionospheric F 2 layer at Dakar. The morning maximum of pulsations corresponds to low values of f o F 2 which contrasts with high values corresponding to the noon maximum. In conclusion the frequency of occurrence of the geomagnetic pulsations Pc does not appear to be directly related to the critical frequency of the F 2 layer.