| Title | Magnetic activity in Canada during the solar- terrestrial disturbance of 24-25 March 1991 |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Boteler, D H ;
Jansen van Beek, G; Hruska, J |
| Source | Geological Survey of Canada, Open File 3129, 1995, 190 pages, https://doi.org/10.4095/205060  Open Access |
| Image |  |
| Year | 1995 |
| Document | open file |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; Yukon; Northwest Territories; Prince Edward Island; Canada; New Brunswick; Nova Scotia; Nunavut; Newfoundland and Labrador |
| NTS | 1; 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 |
| Subjects | geophysics; extraterrestrial geology; magnetic storms; magnetic disturbances |
| Illustrations | sketch maps; analyses |
| Released | 1995 09 01; 2008 08 12 |
| Abstract | The 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 ID | 205060 |
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