Viewing archive of Tuesday, 28 January 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Jan 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 28 Issued at 2200Z on 28 Jan 2025IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
28/1945Z. There are currently 6 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 Jan, 30 Jan,
31 Jan).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 406 km/s at 28/0519Z. Total IMF reached 9
nT at 28/1859Z. The maximum southward component of Bz reached -8 nT at
28/1635Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 315 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (29 Jan) and quiet levels
on days two and three (30 Jan, 31 Jan).
III. Event Probabilities 29 Jan to 31 Jan
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Jan 171 Predicted 29 Jan-31 Jan 155/150/150 90 Day Mean 28 Jan 197
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jan 006/005 Estimated Afr/Ap 28 Jan 005/006 Predicted Afr/Ap 29 Jan-31 Jan 008/010-006/005-005/005
VI. Geomagnetic Activity Probabilities 29 Jan to 31 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 20% | 20% |
| Major-severe storm | 40% | 20% | 20% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/01/04 | X1.85 |
| Last M-flare | 2025/01/29 | M1.0 |
| Last geomagnetic storm | 2025/01/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2024 | 154.5 +2 |
| January 2025 | 145.3 -9.2 |
| Last 30 days | 145.9 +11.5 |