Viewing archive of Sunday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 019 Issued at 2200Z on 19 Jan 2003IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity decreased to very low levels. Activity
during the interval was limited to low level B-class events.
Although there are a number of spotted regions on the solar disk
they were quiescent and magnetically remain simply structured.
Regions 261 (N26W47), 262 (S05W45), and 263 (S13W11) were newly
assigned today.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low to low levels.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was at quiet to active levels. Active
conditions commenced with an increase in the solar wind speed to
approximately 600 km/sec, believed to be associated with coronal
hole effects from the southern polar extension whose leading edge is
at about W53.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at predominantly unsettled to active levels through
day one of the forecast period. The geoeffective coronal hole
effects should subside by day two returning the field to
predominantly unsettled conditions thereafter.
III. Event Probabilities 20 Jan to 22 Jan
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Jan 130 Predicted 20 Jan-22 Jan 125/120/120 90 Day Mean 19 Jan 161
V. Geomagnetic A Indices
Observed Afr/Ap 18 Jan 009/012 Estimated Afr/Ap 19 Jan 013/015 Predicted Afr/Ap 20 Jan-22 Jan 012/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 20 Jan to 22 Jan
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 15% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 20% |
| Minor storm | 15% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
All times in UTC
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