Product: Weekly Highlights and Forecasts
:Issued: 2026 Oct 19 0141 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity - 12 - 18 October 2026
.JPG)
Solar activity reached moderate levels on 16 Oct when Region 4551
(S15, L=102, class/area=Eki/620 on 15 Oct) produced an M1.3 flare
(R1-Minor) at 16/1542 UTC, the largest flare of the week. Solar
activity was at low levels with C-class flare activity throughout
the remainder of the period. No Earth-directed CMEs were observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 16 Oct, with normal to moderate levels observed
throughout the remainder of the week.
The geomagnetic field was at quiet to unsettled levels on 12-15 and
17 Oct, with active levels observed on 16 Oct, due primarily to
negative polarity CH HSS influences. Quiet conditions were observed
on 18 Oct.
Forecast of Solar and Geomagnetic Activity - 19 October - 14 November 2026
Solar activity is expected to be predominantly low, with M-class flare
probabilities ranging from a slight chance to a chance throughout
the outlook period.
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 23-27 Oct and 01-04 Nov, with
normal to moderate levels likely to prevail throughout the
remainder of the period.
Geomagnetic field activity is likely to reach G1 (Minor) storm
levels on 19-20 Oct and 31 Oct-01 Nov, with active conditions likely
on 21 and 24 Oct and 09 Nov, due to CH HSS influences. Quiet and
quiet to unsettled levels are expected to prevail throughout the
remainder of the outlook period.
:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2026 Oct 19 0141 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 2026-10-19
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2026 Oct 19 100 18 5
2026 Oct 20 100 22 5
2026 Oct 21 105 15 4
2026 Oct 22 100 10 3
2026 Oct 23 100 5 2
2026 Oct 24 95 15 4
2026 Oct 25 95 8 3
2026 Oct 26 95 5 2
2026 Oct 27 100 5 2
2026 Oct 28 105 5 2
2026 Oct 29 105 5 2
2026 Oct 30 105 5 2
2026 Oct 31 105 30 5
2026 Nov 01 105 25 5
2026 Nov 02 105 10 3
2026 Nov 03 95 5 2
2026 Nov 04 95 5 2
2026 Nov 05 100 10 3
2026 Nov 06 100 10 3
2026 Nov 07 95 10 3
2026 Nov 08 90 5 2
2026 Nov 09 90 15 4
2026 Nov 10 85 10 3
2026 Nov 11 85 10 3
2026 Nov 12 85 10 3
2026 Nov 13 85 5 2
2026 Nov 14 85 5 2
(NOAA)
