Viewing archive of Saturday, 23 October 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Oct 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 296 Issued at 2200Z on 23 Oct 2021IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 2 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 (24 Oct, 25 Oct, 26 Oct).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 474 km/s at 23/0042Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 140 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (24 Oct, 25 Oct, 26
Oct).
III. Event Probabilities 24 Oct to 26 Oct
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Oct 087 Predicted 24 Oct-26 Oct 090/090/092 90 Day Mean 23 Oct 082
V. Geomagnetic A Indices
Observed Afr/Ap 22 Oct 003/002 Estimated Afr/Ap 23 Oct 004/005 Predicted Afr/Ap 24 Oct-26 Oct 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 24 Oct to 26 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 10% | 10% | 20% |
All times in UTC
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| Last geomagnetic storm | 2024/11/10 | Kp5+ (G1) |
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