Space Weather Forecast Discussion
Forecast Discussion
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Issued: 2023 May 30 0030 UTC

Solar Activity
.24 hr Summary...
Solar activity was low. Regions 3310 (S20W82, Hax/alpha) and 3315 (S16W34, Ekc, beta-gamma) produced the largest flares of the period, a C6.1 and C6.5 respectively. Regions 3317 (N26W41, Dao/beta) and 3318 (N25W33, Dao/beta) both underwent growth with 3318s leading spot appearing to separate towards 3317. The other numbered sunspot groups were stable or in decay. No Earth-directed CMEs were detected.
Solar activity is expected to be low with a chance for M-class flares through 01 Jun.

Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux was normal to moderate and the greater than 10 MeV proton flux was at background levels.
The greater than 2 MeV electron flux is expected to reach high levels on 30-31 May. There is a slight chance for a greater than 10 MeV proton event reaching S1/Minor levels through 01 Jun.

Solar Wind
.24 hr Summary...
Nominal solar wind conditions continued through the day. Solar wind speeds ranged between 360-460 km/s, total field strength was between 3-6 nT, and the Bz component was unremarkable. Phi was negative.
Solar wind parameters are expected to be enhanced on 30 May due to negative polarity CH HSS influences. A gradual return to nominal conditions is expected on 31 May, continuing through 01 Jun.

.24 hr Summary...
The geomagnetic field was at quiet levels.
The geomagnetic field is expected to be quiet to active on 30 May followed by quiet to unsettled conditions on 31 May due to HSS activity. A return to mostly quiet conditions is expected on 01 Jun.
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