Viewing archive of Thursday, 7 January 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Jan 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 7 Issued at 2200Z on 07 Jan 2021IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (08 Jan, 09 Jan, 10 Jan).
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 535 km/s at 06/2224Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 144 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (08 Jan, 09 Jan) and quiet to
unsettled levels on day three (10 Jan).
III. Event Probabilities 08 Jan to 10 Jan
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Jan 075 Predicted 08 Jan-10 Jan 074/074/074 90 Day Mean 07 Jan 085
V. Geomagnetic A Indices
Observed Afr/Ap 06 Jan 009/009 Estimated Afr/Ap 07 Jan 006/007 Predicted Afr/Ap 08 Jan-10 Jan 006/005-006/005-007/008
VI. Geomagnetic Activity Probabilities 08 Jan to 10 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 15% | 15% | 25% |
All times in UTC
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Space weather facts
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| Last M-flare | 2026/04/09 | M1.0 |
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| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
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| April 2026 | 101.7 +15.8 |
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