Viewing archive of Friday, 11 October 2002
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 2002 Oct 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 284 Issued at 2200Z on 11 Oct 2002IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z
Solar activity was low. The most interesting event of
the period was a long-duration C3/Sf event at 11/1719 UTC, with an
associated bright prominence on the west limb near S15. The
presumed source is Region 143 (S16, L=017), which had rotated beyond
the west limb early in the period. Region 139 (N09W46) was a source
of some lesser C-class activity during the period, and remains the
largest sunspot group on the visible disk, with moderate but stable
complexity in its delta magnetic configuration. Region 149 (N15E48)
has exhibited some growth and produced two C-class flares during the
period. Two new regions emerged on the disk and were numbered
today: 155 (S09W53) and 156 (N09E10).
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Regions 139 and 149 are both potential sources of
isolated moderate flare activity.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
The geomagnetic field was quiet to unsettled. The greater than 2 MeV
electron flux at geosynchronous orbit reached moderate levels but
remained below event threshold.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominantly quiet to unsettled.
III. Event Probabilities 12 Oct to 14 Oct
| Class M | 35% | 35% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 11 Oct 179 Predicted 12 Oct-14 Oct 180/185/180 90 Day Mean 11 Oct 181
V. Geomagnetic A Indices
Observed Afr/Ap 10 Oct 010/023 Estimated Afr/Ap 11 Oct 008/010 Predicted Afr/Ap 12 Oct-14 Oct 010/010-008/010-008/008
VI. Geomagnetic Activity Probabilities 12 Oct to 14 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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