Properties of the Main Phases of the Super Geomagnetic Storms(ΔSYM-H≤-250 nT)with Different Heliolongitudes  

作　　者：Ming-Xian Zhao Gui-Ming Le Yong-Hua Liu 

机构地区：[1]Key Laboratory of Space Weather,National Satellite Meteorological Center(National Center for Space Weather),China Meteorological Administration,Beijing 100081,China [2]School of Physics Science&Technology,Lingnan Normal University,Zhanjiang 524048,China [3]Innovation Center for FengYun Meteorological Satellite(FYSIC),Beijing 100081,China [4]CAS Key Laboratory of Solar Activity,National Astronomical Observatories,Beijing 100101,China [5]Polar Research Institute of China,Shanghai 200136,China

出　　处：《Research in Astronomy and Astrophysics》2023年第1期76-82,共7页天文和天体物理学研究（英文版）

基　　金：funded by the SinoSouth Africa Joint Research on Polar Space Environment(2021YFE0106400);International Cooperation Project on Scientific and Technological Innovation Between Governments;National Key Plans on Research and Development,Ministry of Science and Technology,China;the Special Fund of the Institute of Geophysics,China Earthquake Administration(Grant No.DQJB21X26);CAS Key Laboratory of Solar Activity under No.KLSA202109;the National Natural Science Foundation of China(Grant Nos.41074132,41474166,41774195 and 41774085)。

摘　　要：We studied the properties of the main phases of 24 super geomagnetic storms(SGSs)(ΔSYM-H≤-250 nT)since 1981.We divided the SGSs into two subgroups:SGSs-Ⅰ(-400 nT<ΔSYM-H≤-250 nT)and SGSs-Ⅱ(ΔSYM-H≤-400 nT).Of the 24 SGSs,16 are SGSs-Ⅰand eight are SGSs-Ⅱ.The source locations of SGSs were distributed in the longitudinal scope of[E37,W66].95.8%of the SGSs were distributed in the longitudinal scope of[E37,W20].East and west hemispheres of the Sun had 14 and 10 SGSs,respectively.The durations of the main phases for six SGSs ranged from 2 to 4 hr.The durations of the main phases for the rest 18 SGSs were longer than 6.5 hr.The duration of the SGSs with source locations in the west hemisphere varied from 2.22 to 19.58 hr.The duration for the SGSs with the source locations in the east hemisphere ranged from 2.1 to31.88 hr.The averaged duration of the main phases of the SGSs in the west and east hemispheres are 8.3 hr and13.98 hr,respectively.|ΔSYM-H/Δt|for six SGSs with source locations distributed in the longitudinal area ranging from E15 to W20 was larger than 1.0 nT·minute^(-1),while|ΔSYM-H/Δt|for the rest 18 SGSs was lower than 1.0 nT·minute^(-1).|ΔSYM-H/Δt|for SGSs-Ⅰvaried from 0.18 to 3.0 nT·minute^(-1).|ΔSYM-H/Δt|for eight SGSs-Ⅱvaried from 0.37 to 2.2 nT·minute^(-1)with seven SGSs-Ⅱfalling in the scope from 0.37 to0.992 nT·minute^(-1).

关 键 词：The Sun-(Sun:)solar-terrestrial relations-(Sun:)solar wind 

分 类 号：P156[天文地球—天文学]