Subject: Weekly Highlights of Solar and Geomagnetic Activity, 29 May - 04 June 2023

:Product: Weekly Highlights and Forecasts
:Issued: 2023 Jun 05 0151 UTC
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# Weekly Highlights and Forecasts
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Highlights of Solar and Geomagnetic Activity
29 May - 04 June 2023

Solar activity was high. There were a total of seven M-class flares
during the period. The largest event was an M4.2/Sf flare (R1-Minor)
from Region 3323 (S07, L=100, class/area = Ehi/320 on 04 June).
Regions 3310 (S20, L=284, class/area = Cho/480 on 24 May), 3315
(S16, L=233, class/area = Ekc/630 on 29 May), 3319 (S19, L=199,
class/area = Dhi/300 on 31 May), and 3324 (N15, L=159, class/area =
Bxo/20 on 02 June) also produced M-class flaring below the M5 level.
The remaining numbered active regions on the visible disk were
either quiet or only produced C-class events.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached
moderate levels each day of the highlight period.

Geomagnetic field activity ranged from quiet to active levels.
Active levels were reached on 01 and 04 June, with unsettled
conditions observed on 31 May as a result of recurrent CH HSS
influence. Quiet levels were reported for the remainder of the
period.

Forecast of Solar and Geomagnetic Activity
05 June - 01 July 2023

Solar activity is likely to be at low to moderate levels (R1-R2, Minor-Moderate) throughout the outlook period, due to several
complex regions currently on the visible disk and the anticipated
return of several regions that have produced moderate level activity
currently on the farside of the Sun.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to reach high levels on 05-10 and 19-24 June in response to
elevated wind speeds from multiple, recurrent CH HSSs. The remainder
of the outlook period is anticipated to be at moderate levels.

Geomagnetic field activity is expected to range from quiet to G1
(Minor) geomagnetic storm levels. G1 conditions are likely on 18
June; active levels are likely on 12,19-20, and 28 June; unsettled
conditions are likely on 05-06, 11, 13, 21, 27 June and 01 July due
to recurrent CH HSS influence. Quiet conditions are expected for the
remainder of the outlook period.


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* Origin: NOAA Space Weather Prediction Center (3:633/280.2@fidonet)