Viewing archive of Monday, 22 December 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Dec 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 356 Issued at 2200Z on 22 Dec 2025IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z 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 (23 Dec, 24 Dec,
25 Dec).
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic
field has been at unsettled to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 800 km/s at 22/1535Z. Total IMF
reached 10 nT at 21/2241Z. The maximum southward component of Bz reached
-7 nT at 21/2254Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 1882 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (23 Dec), unsettled
to active levels on day two (24 Dec) and quiet to active levels on day
three (25 Dec).
III. Event Probabilities 23 Dec to 25 Dec
| Class M | 30% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Dec 133 Predicted 23 Dec-25 Dec 135/140/145 90 Day Mean 22 Dec 147
V. Geomagnetic A Indices
Observed Afr/Ap 21 Dec 020/027 Estimated Afr/Ap 22 Dec 018/026 Predicted Afr/Ap 23 Dec-25 Dec 015/020-013/018-011/012
VI. Geomagnetic Activity Probabilities 23 Dec to 25 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 30% |
| Minor storm | 30% | 15% | 15% |
| Major-severe storm | 10% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 10% |
| Minor storm | 20% | 30% | 25% |
| Major-severe storm | 65% | 40% | 40% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/02/03 | X1.5 |
| Last M-flare | 2026/02/03 | M7.3 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| February 2026 | 114 -10 |
| Last 30 days | 118.1 +6.2 |