Product: Weekly Highlights and Forecasts
:Issued: 2025 May 12 0245 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 05 - 11 May 2025
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Solar activity reached moderate levels in the final minutes of 11 May following an M-class event that peaked after the turn of the UT day. Solar activty was low the remainder of the time (05-10 May) leading up to that event. Region 4079 (N08, L=240, class/area=Ekc/1250 on 06 May) was responsible for what ended up being an M1.9 flare that peaked at 12/0001 UTC. This region was also responsible for 54 C-class events during the week, most of which were sub C5 level. Region 4082 (S11, L=180, class/area=Dac/140 on 06 May) contributed a pair of C7.0 flares at 08/1141 and 08/1500 UTC respectively, as well as several other low level C-class flares. No significant Earth-directed CMEs were noted during the period.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at high levels on 06-09 May, and moderate levels on 10-11 May.
Geomagnetic field activity was at quiet to unsettled levels on 07 May, quiet to active levels on 06 and 08-10 May, and active to minor storm levels on 05 and 11 May. The increased activity was likely associated with negative polarity CH HSS influence.
Forecast of Solar and Geomagnetic Activity 12 May - 07 June 2025
Solar activity is expected to be predominantly low through the outlook period, with varying chances for M-class flare activity.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at moderate levels from 06-28 May and again on 06-07 Jun. High levels are expected from 29 May to 05 Jun as CH HSS influences increase during this time.
Geomagnetic field activity is anticipated to reach minor storm levels on 28 May - 01 Jun under negative polarity CH HSS influences. Active levels are likely on 13 May, and again on 02 Jun and 06 Jun. Mostly unsettled levels are likely on 12, 14, and 18-21 May, as well as 02 and 05 Jun. Quiet levels are expected on 15-17, and 22-26 May.
:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2025 May 12 0245 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
# 27-day Space Weather Outlook Table
# Issued 2025-05-12
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2025 May 12 125 8 5
2025 May 13 120 12 4
2025 May 14 120 10 3
2025 May 15 115 5 2
2025 May 16 115 5 2
2025 May 17 115 5 2
2025 May 18 115 8 3
2025 May 19 120 10 4
2025 May 20 125 8 3
2025 May 21 125 8 3
2025 May 22 125 6 2
2025 May 23 130 6 2
2025 May 24 130 6 2
2025 May 25 130 5 2
2025 May 26 135 5 2
2025 May 27 140 8 3
2025 May 28 140 25 5
2025 May 29 140 30 5
2025 May 30 140 20 5
2025 May 31 140 20 5
2025 Jun 01 145 20 5
2025 Jun 02 145 12 4
2025 Jun 03 145 8 3
2025 Jun 04 145 10 4
2025 Jun 05 140 12 4
2025 Jun 06 130 10 4
2025 Jun 07 125 10 4
(NOAA)
