Viewing archive of Wednesday, 1 December 2004
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 2004 Dec 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 336 Issued at 2200Z on 01 Dec 2004IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 01-2100Z Solar activity was moderate. Region 708 (N09E14)
produced an M1/Sn flare at 01/0720 UTC. This active region also
generated a few C-class subflares over the past 24 hours. Region 707
(S17W24) produced C-class subflares as well. Both of these regions
have grown in sunspot area and magnetic complexity since yesterday.
IB. Solar Activity Forecast
Solar activity is expected to be
predominately low with C-class flares in Regions 707 and 708. Both
active regions seem capable of producing another isolated M-class
flare.
IIA. Geophysical Activity Summary 30-2100Z to 01-2100Z
The geomagnetic field ranged from quiet to minor storm levels over
the past 24 hours. Most periods were quiet to unsettled with an
isolated active to minor storm period (01 Dec 0600-0900 UTC). ACE
RTSW observations suggest the continued influence of a high-speed
solar wind stream. The Fredericksburg A index reported for 30 Nov in
Part V is estimated from Boulder observations. The greater than 2
MeV electron flux at geosynchronous orbit was high.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to active levels as the high-speed stream
influence persists. The greater than 2 MeV electron flux at
geosynchronous orbit is expected to reach high levels again tomorrow
(02 Dec).
III. Event Probabilities 02 Dec to 04 Dec
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 01 Dec 111 Predicted 02 Dec-04 Dec 115/120/125 90 Day Mean 01 Dec 108
V. Geomagnetic A Indices
Observed Afr/Ap 30 Nov 016/015 Estimated Afr/Ap 01 Dec 012/015 Predicted Afr/Ap 02 Dec-04 Dec 012/015-012/012-010/008
VI. Geomagnetic Activity Probabilities 02 Dec to 04 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 05% | 05% | 05% |
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