Open AccessObservations of highly correlated near‐simultaneous magnetic field perturbations at contraposed ground stations
Author(s) -
Jackel Brian J.,
Eglitis Paul,
Donovan Eric F.,
Viljanen Ari T.,
Wallis Don D.,
Cogger Leroy L.,
Opgenoorth Hermann J.
Publication year - 2001
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2001ja000105
Subject(s) - magnetometer , noon , ionosphere , offset (computer science) , geodesy , local time , dusk , physics , midnight , night sky , geophysics , magnetic field , meteorology , sky , geology , environmental science , atmospheric sciences , astronomy , computer science , mathematics , statistics , quantum mechanics , programming language
A merged data set from Canadian Auroral Network for the OPEN Program Unified Study (CANOPUS) and Magnetometers‐Ionospheric Radars‐All‐Sky Cameras Large Experiment (MIRACLE) magnetometer stations is used to study variations observed at widely separated locations. Three years of 10‐s data are analyzed using canonical correlation techniques to determine the temporal offset of similar fluctuations observed at pairs of sites. Nearly simultaneous (<2‐min delay) signatures are often found between sites separated by 12 hours magnetic local time, with no evidence of more slowly propagating events (> 10‐min delay). Correlated episodes occur more often (roughly 10% of the time) when sites are in the dawn/dusk sectors and less often (∼5%) for noon/midnight configurations.