Viewing archive of Thursday, 4 November 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Nov 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 308 Issued at 2200Z on 04 Nov 2021IA. 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 C3 event observed at
04/1055Z. 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 on days one, two, and three (05 Nov,
06 Nov, 07 Nov).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic
field has been at active to severe storm levels for the past 24 hours.
Solar wind speed reached a peak of 817 km/s at 04/1040Z. Total IMF
reached 24 nT at 03/2357Z. The maximum southward component of Bz reached
-18 nT at 04/0820Z. Protons greater than 10 MeV at geosynchronous orbit
reached a peak level of 10 pfu at 03/2100Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 1173 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on day one (05 Nov), quiet to active
levels on day two (06 Nov) and quiet levels on day three (07 Nov).
III. Event Probabilities 05 Nov to 07 Nov
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Nov 094 Predicted 05 Nov-07 Nov 090/085/085 90 Day Mean 04 Nov 086
V. Geomagnetic A Indices
Observed Afr/Ap 03 Nov 014/014 Estimated Afr/Ap 04 Nov 052/084 Predicted Afr/Ap 05 Nov-07 Nov 017/018-013/015-007/008
VI. Geomagnetic Activity Probabilities 05 Nov to 07 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 25% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 55% | 50% | 40% |
All times in UTC
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