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Issued on 2021 May 26 1236 UTC
At 11:35 UT on May 26, a fast forward shock was observed in the solar wind as registered by DSCOVR, with solar wind speed jumping from 297 km/s to 357 km/s and IMF magnitude jumping from 3 nT to 9 nT. These enhanced solar wind conditions are probably associated with the arrival of several CMEs from May 22 and 23. Solar wind conditions are expected to stay enhanced on May 27.
Active to minor storm geomagnetic intervals (K Dourbes = 4-5) are possible on May 26 and 27.