Viewing archive of Saturday, 18 January 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 Jan 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 018 Issued at 2200Z on 18 Jan 2003IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was low. Region 259 (N10E12) produced
today's only C-class flare, a C1 at 17/2334 UTC. The remainder of
the interval was marked by a very little activity. All of the
sunspot groups currently on the disk are quiet and stable.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low for the next three days
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field ranged from quiet to active levels. There was
one active period from 1200-1500 UTC. There does appear to be some
low level wave activity in the solar wind data (Bz is showing
fluctuations from -10 nT to +10 nT with a period slightly longer
than one hour). This may be related to coronal hole effects from the
southern polar extension whose leading edge is at about W40.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominantly unsettled for the next three days.
III. Event Probabilities 19 Jan to 21 Jan
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Jan 137 Predicted 19 Jan-21 Jan 135/125/125 90 Day Mean 18 Jan 162
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jan 004/008 Estimated Afr/Ap 18 Jan 012/013 Predicted Afr/Ap 19 Jan-21 Jan 010/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 19 Jan to 21 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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