講演情報
[PEM07-P05]MAGDASネットワークによって観測された高速太陽風条件下での磁気赤道Pc 5の特徴
*秋本 開成1、藤本 晶子2、吉川 顕正1、魚住 禎司2、阿部 修司2 (1.九州大学大学院 理学府 地球惑星科学専攻、2.九州大学 国際宇宙天気科学・教育センター)
キーワード：
MAGDAS、磁気赤道、Pc 5
While investigating auroral latitude Pc 5 pulsations, Baker et al. (2003) and Mathie and Mann et al. (2001) found that these pulsations have a good correlation with the solar wind flow speed. Also, Mathie and Mann et al. (2000) found that auroral latitude Pc 5 is related to relativistic electron flux variation in the radiation belt. There are many studies about the characteristics of auroral latitude Pc 5, while equatorial Pc 5 received little attention because there are fewer observation points in the equatorial region. So, we investigated the characteristics of equatorial Pc 5 under high-speed solar wind conditions by using the data from dip equator stations of the MAGDAS/CPMN network (Kyushu University) during 2005/01/01 ~2013/12/31. We found that electron flux enhancement is preceded by an intense activity of Pc 5 at the dayside equatorial MAGDAS stations during 2010/08/24~2010/08/27. Reeves et al. (2003) showed that different types of relativistic electron flux variation are observed after geomagnetic disturbances such as magnetic storm (i.e. not only increase type but also no-change type and decrease type).We statistically analyzed the dependence of equatorial Pc 5 pulsations on the relativistic electron flux variation.