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-赠款结束）的1个Au航天器数据中的所有激波，并描述其强度和方向。将利用多航天器对同一冲击的数据进行比较来确定事件的规模大小。这些长的数据集将被用来记录太阳周期的震动频率和特征的变化。将对所确定的地震特征与地磁活动指数进行互相关，以确定上游地震特征的知识是否有助于预测地磁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.