Viewing archive of Thursday, 27 November 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Nov 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 331 Issued at 2200Z on 27 Nov 2025IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 5 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a slight chance for an M-class flare on days one, two, and three (28
Nov, 29 Nov, 30 Nov).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at unsettled to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 779 km/s at 26/2242Z. Total IMF
reached 7 nT at 27/1714Z. The maximum southward component of Bz reached
-6 nT at 27/1131Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 8297 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at active levels on day one (28 Nov) and quiet to unsettled levels
on days two and three (29 Nov, 30 Nov).
III. Event Probabilities 28 Nov to 30 Nov
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Nov 120 Predicted 28 Nov-30 Nov 125/125/130 90 Day Mean 27 Nov 147
V. Geomagnetic A Indices
Observed Afr/Ap 26 Nov 015/023 Estimated Afr/Ap 27 Nov 021/028 Predicted Afr/Ap 28 Nov-30 Nov 018/025-009/012-008/008
VI. Geomagnetic Activity Probabilities 28 Nov to 30 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 35% | 35% | 35% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 186 +94.2 |
| Last 30 days | 106.3 +12.6 |