Interplanetary Shocks: Occurrence Frequency, Characteristics, and Geoeffectiveness

该项目将识别来自IMP 8（1973-2001）、WIND（1994-2001）和ACE（1997-拨款结束）的1个AU航天器数据中的所有冲击，并表征它们的强度和方向。对同一冲击的多航天器数据的比较将用于确定事件的规模大小。这些长数据集将被用来记录太阳周期在激波频率和特征上的变化。将对已确定的激波特征与地磁活动指数进行相互关联，以确定上游激波特征的知识是否有助于预测地磁风暴的持续时间和严重程度。

This project will identify all the shocks in 1 AU spacecraft data from IMP 8 (1973-2001), WIND (1994-2001), and ACE (1997-end of grant) and characterize their strength and orientation. Comparisons of multi-spacecraft data for the same shock will be used to determine the scale size of the events. These long data sets will then be employed to document the solar-cycle variations in shock frequency and characteristics. A cross-correlation of the determined shock characteristics with geomagnetic activity indices will be carried out in order to determine if knowledge of upstream shock characteristics is useful in predicting the duration and severity of geomagnetic storms.