Viewing archive of Sunday, 28 January 2024
Solar activity report
Report of Solar-Geophysical Activity 2024 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 2024IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
28/1017Z. 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 (29 Jan, 30 Jan,
31 Jan).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 455 km/s at 28/1843Z. Total IMF reached 12 nT at
28/0937Z. The maximum southward component of Bz reached -6 nT at
28/1856Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 123 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (29 Jan, 31
Jan) and quiet to active levels on day two (30 Jan).
III. Event Probabilities 29 Jan to 31 Jan
| Class M | 25% | 25% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Jan 141 Predicted 29 Jan-31 Jan 140/135/140 90 Day Mean 28 Jan 157
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jan 004/004 Estimated Afr/Ap 28 Jan 007/008 Predicted Afr/Ap 29 Jan-31 Jan 011/010-010/012-010/010
VI. Geomagnetic Activity Probabilities 29 Jan to 31 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 20% |
| Minor storm | 05% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 25% | 40% | 25% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/05/15 | X2.9 |
| Last M-flare | 2024/05/19 | M1.6 |
| Last geomagnetic storm | 2024/05/17 | Kp6 (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| May 2024 | 157.7 +21.2 |
| Last 30 days | 169.2 +51.4 |