Product: Weekly Highlights and Forecasts
:Issued: 2025 Oct 13 0235 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 06 - 12 October 2025
Solar activity reached moderate levels on 09 Oct when Region 4236 (N10, L=62, class/area=Ekc/320 on 04 Oct) produced an M2.0 flare (R1-Minor) at 09/1231 UTC; the largest event and sole M-flare of the period. Solar activity was at low levels throughout the remainder of the period. Region 4246 (N24, L= 290, class/area=Dai/180 on 12 Oct) produced several C-flares over 10-12 Oct, along with two Earth-directed CMEs. The first CME was associated with coronal dimming near AR4246 at around 11/0115 UTC, and the second CME was associated with a long-duration C9.6/1f flare at 12/1350 UTC from AR4246. The first CME is anticipated to arrive on 15 Oct, and the second CME is anticipated to arrive on 16 Oct.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 06-12 Oct.
Geomagnetic field activity was quiet on 06 Oct. Periods of active conditions were observed on 07-08 Oct due to the passage of CMEs that left the Sun on 03 Oct. Quiet conditions were observed again on 09 Oct. Active conditions were observed on 10 Oct, with periods of G1 (Minor) storming observed on 11-12 Oct, due to negative polarity CH HSS influences and possible embedded transient influences.
Forecast of Solar and Geomagnetic Activity 13 October - 08 November 2025
Solar activity is expected to be at low levels throughout the period, with a varying chance for M-flare (R1-R2/Minor-Moderate) activity.
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 13-19, 21-24, and 28 Oct-08 Nov. Normal to moderate levels are expected throughout the remainder of the period.
Geomagnetic field activity is expected to reach active and G1 (Minor) storm levels on 13 Oct, and quiet to unsettled levels on 14 Oct, in response to waning negative polarity CH HSS influences. Periods of active conditions are likely on 15 Oct due to the anticipated arrival of a CME from 11 Oct, and again on 16 Oct due to
the anticipated arrival of a CME from 12 Oct. Periods of G1 (Minor) storm levels are likely on 20 Oct due to negative polarity CH HSS influences. Active conditions are likely over 25-26 Oct in response to negative polarity CH HSS influences. Periods of G1 storming are likely on 28 and 30 Oct, with periods of G2 (Moderate) storming likely on 29 Oct, due to positive polarity CH HSS influences. G1 (Minor) storms are likely again on 08 Nov due to the anticipated influences of another recurrent, negative polarity CH HSS. Quiet and quiet to unsettled levels are expected to prevail throughout the remainder of the period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2025 Oct 13 0235 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 2025-10-13
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2025 Oct 13 140 18 4
2025 Oct 14 145 8 3
2025 Oct 15 145 15 4
2025 Oct 16 150 10 3
2025 Oct 17 150 5 2
2025 Oct 18 150 5 2
2025 Oct 19 150 5 2
2025 Oct 20 150 15 5
2025 Oct 21 150 10 3
2025 Oct 22 145 8 3
2025 Oct 23 140 5 2
2025 Oct 24 145 5 2
2025 Oct 25 150 12 4
2025 Oct 26 150 12 4
2025 Oct 27 150 8 3
2025 Oct 28 145 25 5
2025 Oct 29 145 35 6
2025 Oct 30 145 25 5
2025 Oct 31 140 15 4
2025 Nov 01 140 8 3
2025 Nov 02 140 5 2
2025 Nov 03 135 5 2
2025 Nov 04 140 5 2
2025 Nov 05 145 5 2
2025 Nov 06 135 10 3
2025 Nov 07 130 15 4
2025 Nov 08 130 30 5
(NOAA)
