Viewing archive of Monday, 8 December 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Dec 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 342 Issued at 2200Z on 08 Dec 2025IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity has been at high levels for the past 24 hours.
There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(09 Dec, 10 Dec, 11 Dec).
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 594 km/s at 08/1918Z. Total IMF reached 7 nT at
07/2210Z. The maximum southward component of Bz reached -4 nT at
08/2055Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 1039 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at active to severe storm levels on day one (09 Dec), quiet to
minor storm levels on day two (10 Dec) and quiet to unsettled levels on
day three (11 Dec). Protons have a slight chance of crossing threshold
on days one, two, and three (09 Dec, 10 Dec, 11 Dec).
III. Event Probabilities 09 Dec to 11 Dec
| Class M | 65% | 65% | 65% |
| Class X | 15% | 15% | 15% |
| Proton | 15% | 15% | 15% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 08 Dec 186 Predicted 09 Dec-11 Dec 190/185/175 90 Day Mean 08 Dec 149
V. Geomagnetic A Indices
Observed Afr/Ap 07 Dec 005/009 Estimated Afr/Ap 08 Dec 013/018 Predicted Afr/Ap 09 Dec-11 Dec 044/066-022/033-007/010
VI. Geomagnetic Activity Probabilities 09 Dec to 11 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 35% | 20% |
| Minor storm | 30% | 35% | 05% |
| Major-severe storm | 50% | 20% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 15% |
| Minor storm | 15% | 20% | 25% |
| Major-severe storm | 85% | 75% | 25% |
All times in UTC
Latest news
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Wednesday, 31 December 2025
Happy New Year! Celebrate with an M7.1 solar flare!
Latest forum messages
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
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 |
| January 2026 | 119.1 -4.9 |
| Last 30 days | 122.3 +12.7 |