کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9827671 | 1523683 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Identification of solar sources of major geomagnetic storms
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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چکیده انگلیسی
We present the identification of solar coronal mass ejection (CME) sources for selected major geomagnetic storms (disturbance storm index-Dst⩽â100 nT) that occurred in October-November 2003. The CME data were obtained from the LASCO CME Catalog. We estimated time of flight of the CMEs from Sun to near-Earth space from their speed obtained from the linear fit, and identified the geoeffective ones. We analyzed the CMEs produced by the active region NOAA AR10486 from October 22 to November 4, during its passage across the visible solar disk. This huge sunspot region produced many X flares, the largest ones accompanied by intense >100 MeV SEP events and associated with full halo CMEs that mostly propagated in the western hemisphere, and caused strong geomagnetic storms. These results are in agreement with the idea that the fast and large CMEs propagating in a disturbed solar wind could accelerate energetic particles and intensify the magnetic storms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 67, Issues 17â18, December 2005, Pages 1702-1705
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 67, Issues 17â18, December 2005, Pages 1702-1705
نویسندگان
E. Correia, R.V. de Souza,