Viewing archive of Tuesday, 23 December 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Dec 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 357 Issued at 2200Z on 23 Dec 2025IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 7 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 (24 Dec, 25 Dec,
26 Dec).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at unsettled to active levels for the past 24 hours.
Solar wind speed reached a peak of 907 km/s at 23/1631Z. Total IMF
reached 7 nT at 22/2307Z. The maximum southward component of Bz reached
-5 nT at 23/1710Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 5557 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on day one (24 Dec), quiet to active
levels on day two (25 Dec) and quiet to unsettled levels on day three
(26 Dec).
III. Event Probabilities 24 Dec to 26 Dec
| Class M | 30% | 40% | 45% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Dec 142 Predicted 24 Dec-26 Dec 145/150/155 90 Day Mean 23 Dec 147
V. Geomagnetic A Indices
Observed Afr/Ap 22 Dec 017/025 Estimated Afr/Ap 23 Dec 016/022 Predicted Afr/Ap 24 Dec-26 Dec 013/018-011/012-008/010
VI. Geomagnetic Activity Probabilities 24 Dec to 26 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 15% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 45% | 40% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/02/04 | X4.3 |
| Last M-flare | 2026/02/05 | M1.1 |
| Last geomagnetic storm | 2026/02/05 | Kp5+ (G1) |
| Spotless days | |
|---|---|
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| Monthly mean Sunspot Number | |
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| Last 30 days | 124.9 +18 |