Viewing archive of Thursday, 30 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 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 030 Issued at 2200Z on 30 Jan 2003IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was very low. The day's most dramatic
event was the disappearance of a large n-s oriented filament from
the north-central disk at approximately 1000 UTC. This event was
seen as a CME further out in the corona, taking on the appearance of
a partial halo. This ejecta has an earthward component, and is
expected to pass on February 2. Otherwise, little of significance
occurred.
IB. Solar Activity Forecast
Solar activity is expected to continue
very low to low.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was at mostly active levels for the past 24
hours. The solar wind radial speed rose to over 500 km/s during the
day, presumably originating from a coronal hole in the western solar
hemisphere. This feature was present last rotation, but did not
affect the magnetosphere to this degree.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to vary generally from unsettled to active levels. The
current high speed stream is likely to fuel another day of active
conditions, calming on February 1. On February 2, effects of the CME
seen near midday today are expected, bringing another episode of
active conditions, with a good chance of episodes of minor storm.
III. Event Probabilities 31 Jan to 02 Feb
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Jan 121 Predicted 31 Jan-02 Feb 125/125/130 90 Day Mean 30 Jan 157
V. Geomagnetic A Indices
Observed Afr/Ap 29 Jan 009/014 Estimated Afr/Ap 30 Jan 018/025 Predicted Afr/Ap 31 Jan-02 Feb 015/020-010/010-020/025
VI. Geomagnetic Activity Probabilities 31 Jan to 02 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 40% |
| Minor storm | 10% | 10% | 20% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 50% |
| Minor storm | 15% | 10% | 25% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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