Viewing archive of Tuesday, 22 January 2002
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2002 Jan 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 022 Issued at 2200Z on 22 Jan 2002IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity increased to moderate levels. Region
9791 (S02W46) produced an impulsive M1/1n flare at 22/0900 UTC. The
sunspot group appears to have simplified somewhat since the flare
occurred, reducing penumbral coverage to about half of what was
observed yesterday. Region 9789 (N18W42) produced an impulsive
C5/Sf flare at 22/1313 UTC and has also been in decay since flare
occurrence. One event of note, an optically uncorrelated near long
duration C1 flare occurred at 22/0758 UTC. This flare had an
associated Type II radio sweep with an estimated shock velocity of
1017 km/s. LASCO imagery doesn't indicate earth directed CME
activity with any of today's events. Regions 9787 (S06E19) and 9788
(N18E00) have shown growth over the period as both regions have
acquired gamma classification to their magnetic structures. No new
regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
low to moderate levels. Regions 9787 and 9788 have the potential of
producing M-class flare activity.
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic field activity was at quiet to unsettled levels.
IIB. Geophysical Activity Forecast
The geomagnetic field activity
is expected to be at quiet to unsettled levels.
III. Event Probabilities 23 Jan to 25 Jan
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Jan 229 Predicted 23 Jan-25 Jan 235/235/235 90 Day Mean 22 Jan 223
V. Geomagnetic A Indices
Observed Afr/Ap 21 Jan 007/009 Estimated Afr/Ap 22 Jan 006/006 Predicted Afr/Ap 23 Jan-25 Jan 006/008-006/008-008/008
VI. Geomagnetic Activity Probabilities 23 Jan to 25 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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