Viewing archive of Tuesday, 4 February 2003
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 2003 Feb 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 035 Issued at 2200Z on 04 Feb 2003 IA. Analysis of Solar Active Regions and Activity from 03/2100 UTC to 04/2100 UTC: Solar activity was at low levels during the past 24 hours. Region 278 (N20E81) produced the only C-flare, a C1.4 at 04/2016 UTC. Region 276 (S13E45) continues to be the largest region on the disk with an area of 260 millionths and fairly continuous point brightenings. New regions 277 (S19E70) have produced several B-class flares, and show continual activity.IB. Solar Activity Forecast
Solar activity is expected to be
low to moderate. Regions 276, 277, and 278 have potential for M-class flare activity.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field was at unsettled to active levels during the
past 24 hours. Solar wind observations show a continuation of
yesterday's enhanced flow associated with a coronal hole structure
in the northern hemisphere. Flow should return to nominal levels in
the next 24 hours. The greater than 2 MeV electron fluxes briefly
reached high levels during the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly unsettled tomorrow, with a chance for some
isolated active periods later in the day. An increase to active
levels is expected for the second day due to a favorably positioned
coronal hole.
III. Event Probabilities 05 Feb to 07 Feb
| Class M | 35% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Feb 135 Predicted 05 Feb-07 Feb 140/145/145 90 Day Mean 04 Feb 154
V. Geomagnetic A Indices
Observed Afr/Ap 03 Feb 016/019 Estimated Afr/Ap 04 Feb 017/024 Predicted Afr/Ap 05 Feb-07 Feb 015/020-015/015-010/010
VI. Geomagnetic Activity Probabilities 05 Feb to 07 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 25% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 25% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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