Viewing archive of Saturday, 4 February 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Feb 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 35 Issued at 2200Z on 04 Feb 2023IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
04/0055Z. There are currently 4 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low on
days one, two, and three (05 Feb, 06 Feb, 07 Feb).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 474 km/s at 04/0552Z. Total IMF reached 7
nT at 04/0341Z. The maximum southward component of Bz reached -7 nT at
04/0341Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 113 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (05 Feb), quiet to unsettled levels on
day two (06 Feb) and quiet to active levels on day three (07 Feb).
III. Event Probabilities 05 Feb to 07 Feb
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Feb 139 Predicted 05 Feb-07 Feb 140/145/150 90 Day Mean 04 Feb 152
V. Geomagnetic A Indices
Observed Afr/Ap 03 Feb 006/007 Estimated Afr/Ap 04 Feb 007/008 Predicted Afr/Ap 05 Feb-07 Feb 006/005-008/010-013/015
VI. Geomagnetic Activity Probabilities 05 Feb to 07 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 30% |
| Minor storm | 01% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 10% | 25% | 40% |
All times in UTC
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