In this Task it is planned to analyze the temporal variation of magnetic data (so-called Dst index) observed from ground-based stations during and after solar events, as determined in the other WPs. The onset and the minimum magnetic field of the geomagnetic storms will be determined, as well as the storm specific profile in comparison with other geomagnetic storms of similar magnitude.

Expected result: Analysis of the occurrence of geomagnetic storms due to solar events as selected in the other WPs together with the storm characteristics compared to the entire geomagnetic storm distribution in solar cycle 24.

 

Expected result: Determination of the effects in the terrestrial ionosphere during the selected events.

 

For each of the analyzed and modelled events, during the period of several hours after the start of the solar flare, the in situ satellite data (e.g. predominantly at L1 from Wind/EPACT, SOHO/ERNE and ACE/EPAM) will be cross-checked for energetic particles – electrons, ions and heavy ions. For each particle event, the onset, peak time, peak intensity, onset-to-peak fluence and spectral properties (if signal over several energy channels is present) will be identified.

Expected result: Determination of the specific characteristics and peculiarities of each studied event compared to the particle distribution in solar cycle 24.