Solar alert

Issued on 2021 Oct 12 0718 UTC

DSCOVR registered a shock in the solar wind around 01:45 UT today (October 12). This probably marks the arrival of the ICME associated with the October 9 halo CME. The solar wind speed jumped from about 365 to 490 km/s with current values around 520 km/s, while the magnitude of the Interplanetary Magnetic Field jumped from about 5.5 to 14.5 nT with current values around 15 nT. Bz has been below -5 nT most of the time since 0h UT, with a minimum of -16 nT and current values of -10 nT.

K Dourbes had active to minor storm intervals (4-5) since 0h UT, while Kp values of 5 and 6 were registered.

Minor storm intervals (K Dourbes = 5) are possible in the next 24 hours, with a chance for moderate storm intervals (K Dourbes = 6).

Reference for this alert

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