:Product: Weekly Highlights and Forecasts
:Issued: 2024 Sep 30 0122 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
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# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
23 - 29 September 2024
Solar activity reached moderate levels on 23, 25-26, and 29 Sep with
a total of six R1 (Minor) events observed throughout the week. Low
levels of solar activity and C-class flare activity were observed
throughout the remainder of the period. The largest events of the
period were a pair of M1.7 flares from Region 3842 (S15, L=178,
class/area=Dai/230 on 29 Sep) at 29/1424 and 1441 UTC. No
Earth-directed CMEs resulted from this weeks solar activity.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 23 Sep, and normal to moderate levels on 24-29 Sep.
Geomagnetic field activity reached active levels on 23 and 26 Sep,
and G1 (Minor) storm levels on 24-25 Sep, due to the passage of CMEs
(23-25 Sep) and the influence of a positive polarity CH HSS (25-26
Sep). Quiet to unsettled conditions were observed over 27-29 Sep.
Forecast of Solar and Geomagnetic Activity
30 September - 26 October 2024
Solar activity is expected to range from low to moderate levels.
R1-R2 (Minor-Moderate) events are likely, with a slight chance for
R3 or greater events, throughout the period.
No proton events are expected at geosynchronous orbit, barring
significant flare activity.
The greater than 2 MeV electron flux at geosynchronous orbit is
likely to reach high levels on 12-15 Oct, with normal to moderate
levels likely to persist throughout the remainder of the period.
Geomagnetic field activity is likely to reach active levels on 30
Sep due to negative polarity CH HSS influences. Active levels are
likely on 05-06, and 10 Oct due to positive polarity CH HSS
influences. Periods of G1 (Minor) storming are likely on 11-12, and
22 Oct due to positive polarity CH HSS influences.
Weekly Highlights of Solar and Geomagnetic Activity, 23 - 29 September 2024