Viewing archive of Monday, 23 January 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Jan 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 23 Issued at 2200Z on 23 Jan 2023IA. 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.
The largest solar event of the period was a C8 event observed at
22/2225Z from Region 3191 (N12W57). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (24 Jan, 25 Jan, 26 Jan).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 555 km/s at 23/0613Z. Total IMF reached 11
nT at 23/0603Z. The maximum southward component of Bz reached -8 nT at
23/0714Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 329 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (24 Jan, 25 Jan) and
quiet to unsettled levels on day three (26 Jan). Protons have a slight
chance of crossing threshold on days one, two, and three (24 Jan, 25
Jan, 26 Jan).
III. Event Probabilities 24 Jan to 26 Jan
| Class M | 45% | 45% | 45% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Jan 189 Predicted 24 Jan-26 Jan 185/185/180 90 Day Mean 23 Jan 150
V. Geomagnetic A Indices
Observed Afr/Ap 22 Jan 007/008 Estimated Afr/Ap 23 Jan 007/007 Predicted Afr/Ap 24 Jan-26 Jan 008/012-013/015-007/010
VI. Geomagnetic Activity Probabilities 24 Jan to 26 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 25% |
| Minor storm | 10% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 20% |
| Minor storm | 35% | 35% | 30% |
| Major-severe storm | 35% | 40% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/22 | M1.3 |
| Last geomagnetic storm | 2025/04/21 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 121.5 -12.7 |
| Last 30 days | 114.6 -22.2 |