Viewing archive of Friday, 28 November 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Nov 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 332 Issued at 2200Z on 28 Nov 2025IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z 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 chance for M-class flares on days one, two, and three (29 Nov, 30 Nov,
01 Dec).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at unsettled to active levels for the past 24 hours.
Solar wind speed reached a peak of 707 km/s at 27/2158Z. Total IMF
reached 7 nT at 27/2110Z. The maximum southward component of Bz reached
-5 nT at 28/1123Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 14759 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (29 Nov), quiet to unsettled
levels on day two (30 Nov) and quiet levels on day three (01 Dec).
III. Event Probabilities 29 Nov to 01 Dec
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Nov 138 Predicted 29 Nov-01 Dec 140/150/150 90 Day Mean 28 Nov 145
V. Geomagnetic A Indices
Observed Afr/Ap 27 Nov 023/027 Estimated Afr/Ap 28 Nov 016/021 Predicted Afr/Ap 29 Nov-01 Dec 010/012-009/008-005/005
VI. Geomagnetic Activity Probabilities 29 Nov to 01 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 10% |
| Minor storm | 15% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 25% | 20% |
| Major-severe storm | 40% | 25% | 15% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
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| Last 30 days | 118.6 +9.5 |