کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1766439 | 1020149 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Statistical properties of the most powerful solar and heliospheric disturbances
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Statistical properties of the most powerful solar and heliospheric disturbances Statistical properties of the most powerful solar and heliospheric disturbances](/preview/png/1766439.png)
چکیده انگلیسی
We present and discuss here the first version of a data base of extreme solar and heliospheric events. The data base contains now 87 extreme events mostly since 1940. An event is classified as extreme if one of the three critical parameters passed a lower limit. The critical parameters were the X-ray flux (parameter R), solar proton flux (parameter S) and geomagnetic disturbance level (parameter G). We find that the five strongest extreme events based on four variables (X-rays SEP, Dst, Ap) are completely separate except for the October 2003 event which is one the five most extreme events according to SEP, Dst and Ap. This underlines the special character of the October 2003 event, making it unique within 35 years. We also find that the events based on R and G are rather separate, indicating that the location of even extreme flares on the solar disk is important for geomagnetic effects. We also find that SÂ =Â 3 events are not extreme in the same sense as RÂ >Â 3 and GÂ >Â 3 events, while SÂ =Â 5 events are missing so far. This suggests that it might be useful to rescale the classification of SEP fluxes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 43, Issue 4, 16 February 2009, Pages 634-640
Journal: Advances in Space Research - Volume 43, Issue 4, 16 February 2009, Pages 634-640
نویسندگان
O.S. Yakovchouk, I.S. Veselovsky, K. Mursula,