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TitleMagnetic activity in Canada during the solar- terrestrial disturbance of 24-25 March 1991
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBoteler, D HORCID logo; Jansen van Beek, G; Hruska, J
SourceGeological Survey of Canada, Open File 3129, 1995, 190 pages, https://doi.org/10.4095/205060 Open Access logo Open Access
Image
Year1995
Documentopen file
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; Yukon; Northwest Territories; Prince Edward Island; Canada; New Brunswick; Nova Scotia; Nunavut; Newfoundland and Labrador
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 67; 66; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 85; 84; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114; 115; 116; 117; 120; 340; 560
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
Subjectsgeophysics; extraterrestrial geology; magnetic storms; magnetic disturbances
Illustrationssketch maps; analyses
Released1995 09 01; 2008 08 12
AbstractThe solar-terrestrial event of 22-25 March 1991, was one of the largest this solar cycle, producing a very strong particle flux, a second inner radiation belt, and a large geomagnetic disturbance. This caused solar panel degradation and other satellite malfunctions as well as communication and power system problems. This report examines the resulting magnetic disturbance observed across Canada on 24-25 March, presenting stack plots of the temporal variations and using equivalent current plots to map the spatial characteristics of the disturbance. A notable feature of the results is that the largest magnetic field variations occurred in the polar cap and not, as is more common, in the auroral zone. These polar cap magnetic variations are attributed to Hall currents in the ionosphere resulting from the enhanced convection of field lines across the polar cap. The extreme magnitude of the polar cap disturbance indicates the severity of the solar wind plasma cloud interaction with the earth's magnetosphere.
GEOSCAN ID205060

 
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