Subject: Weekly Highlights of Solar and Geomagnetic Activity, 25 - 31 March 2024

:Product: Weekly Highlights and Forecasts
:Issued: 2024 Apr 01 0214 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
25 - 31 March 2024

Solar activity was dominated by significant flare activity from
Region 3615 (S13, L=216, class/area Fkc/1140 on 26 Mar). During the
period, Region 3615 produced 62 C-class flares, 11 (R1-Minor)
flares, 3 (R2-Moderate) flares and 1 (R3-Strong) flare. The largest
event of the period was an X1.1/3b flare at 28/2056 UTC. Numerous
CMEs were detected with these flares, but none indicated an
Earth-directed component. C-class activity was also detected from
Regions 3621 (N17, L=254, class/area Cso/040 on 25 Mar), 3622 (N19,
L=139, class/area Dao/060 on 24 Mar) and 3625 (N12, L=040,
class/area Dai/040 on 31 Mar).

The greater than 10 MeV proton flux was at elevated levels from the
previous period's events, but remained below event threshold.

The greater than 2 MeV electron flux at geosynchronous orbit was at
normal to moderate levels.

Geomagnetic field activity was at quiet to minor storm (G1-Minor)
levels on 25 Mar as the field was in the waning stages from previous
CME activity. Quiet to unsettled periods dominated the period from
26-31 March. An isolated active period was observed early on 31 Mar
due to a transition from a CIR into a positive polarity CH HSS.

Forecast of Solar and Geomagnetic Activity
01 April - 27 April 2024

Solar activity is expected to be at mostly low levels with a
lingering chance for an M-class flare through 12 Apr. An increased
chance for moderate to high activity will be present from 13-27
April upon the return of old Region 3615 (S13, L=216).

No proton events are expected at geosynchronous orbit until the
return of old Region 3615 on 12 Apr. A chance for minor to moderate
activity will be present from 13-27 Apr.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at normal to moderate levels through the period.

Geomagnetic field activity is expected to be at unsettled to active
periods on 01-05 Apr, 09-11 Apr, 19-23 Apr and 27 Apr all due to CH
HSS activity. Mostly quiet levels are expected on 06-08 Apr, 12-18
Apr and 24-26 Apr.


--- MBSE BBS v1.0.8.4 (Linux-x86_64)
* Origin: NOAA Space Weather Prediction Center (3:633/280.2@fidonet)