SIR/HSS list from Wind (1995 - 2022)

For the identification of SIR events we have used, as a starting point, the list by Grandin et al. 2019, which spans the 1995–2017 time period. We have excluded all events that had embedded CMEs and kept only single and isolated events without  preconditioning, requiring the average solar wind speed and number density to be less than 400 km/s and 15 cm−3, respectively, for at least 12 hr before the start of the event. We further extended the list up to 2022, via visual inspection of solar wind plasma parameters time-series, with events that also satisfied the aforementioned criteria. The final SIR list includes 186 events. For each event we have visually identified the start and end time of the interaction region as the time period where the density increases above 10 particles/cm−3, accompanied by an increase in the IMF magnitude and the proton density gradient (dnp/dt). Similarly, the HSS start time is identified as the time when solar wind speed exceeds 450 km/s, while the HSS end time corresponds to the first time when the solar wind speed drops below 400 km/s after reaching its maximum value.