Viewing archive of Saturday, 28 October 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Oct 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 301 Issued at 2200Z on 28 Oct 2023IA. 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 C1 event observed at
28/0623Z from Region 3473 (N16E44). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares and a slight chance for an M-class
flare on days one, two, and three (29 Oct, 30 Oct, 31 Oct).
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 562 km/s at 28/1833Z. Total IMF reached 13
nT at 28/0653Z. The maximum southward component of Bz reached -9 nT at
28/1508Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 287 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (29 Oct) and unsettled to
minor storm levels on days two and three (30 Oct, 31 Oct).
III. Event Probabilities 29 Oct to 31 Oct
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Oct 128 Predicted 29 Oct-31 Oct 129/133/137 90 Day Mean 28 Oct 151
V. Geomagnetic A Indices
Observed Afr/Ap 27 Oct 009/010 Estimated Afr/Ap 28 Oct 013/017 Predicted Afr/Ap 29 Oct-31 Oct 011/015-016/025-015/020
VI. Geomagnetic Activity Probabilities 29 Oct to 31 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 40% | 35% |
| Minor storm | 10% | 30% | 25% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 40% | 65% | 55% |
All times in UTC
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