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Issued on 2021 Jun 02 1826 UTC
At 12:20 UT on June 02, a solar wind shock was observed in the solar wind parameters as registered by DSCOVR, with solar wind speed jumping from 289 km/s to 325 km/s and the interplanetary magnetic field magnitude jumping from 3 nT to 6 nT. The origin of these enhanced solar wind conditions could be associated with the arrival of the coronal mass ejection from May 28 or the arrival of the fast solar wind speed from the equatorial coronal hole (that reached the central meridian on May 31). Active geomagnetic intervals (K-Dourbes = 4) following the solar wind shock was also observed.