Solar wind forecast

PREDSTORM is our real-time solar wind forecast for the Sun-Earth L1 point. It is updated every 10 minutes, and is based on a recurrence model using the NOAA real time solar wind, provided by the DSCOVR or ACE spacecraft. Caution: This forecast only works for high-speed solar wind streams, and will fail during times when solar storms, also known as coronal mass ejections, impact the Earth's magnetic field.

The first two plots show the same data and forecast, the third plot shows the NOAA data along with STEREO-A beacon data. STEREO-A is positioned close to Earth in summer 2023, at a distance of 0.05 AU closer to the Sun, and thus forms a sub-L1 solar wind monitor. We use our own model, based on machine learning, to calculate the geomagnetic Dst index from the solar wind recurrence model forecasts.

Bailey et al. (2020) presented a study in which STEREO-A in situ data was used for an ambient solar wind forecast. This forms a baseline for techniques to be applied to data returned by the ESA Vigil mission, starting with the early 2030s when Vigil will be stationed at the Sun--Earth L5 point. PREDSTORM will then be able to include real-time data returned by Vigil.

The data shown in the plots are available in ASCII format in a 1 hour time resolution and 1 min time resolution.