Viewing archive of Thursday, 27 October 2005
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 2005 Oct 27 2204 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 300 Issued at 2200Z on 27 Oct 2005IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity was at very low levels. No sunspots
were reported on the visible disk. No new regions were numbered
today.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low levels.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was at quiet to unsettled levels. Solar wind
speed has steadily decreased thoughout the day and is now at
approximately 460 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels. Isolated active
periods are possible on 28 and 29 October due to the geoeffective
coronal hole high speed stream.
III. Event Probabilities 28 Oct to 30 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Oct 072 Predicted 28 Oct-30 Oct 070/070/070 90 Day Mean 27 Oct 087
V. Geomagnetic A Indices
Observed Afr/Ap 26 Oct 008/008 Estimated Afr/Ap 27 Oct 006/008 Predicted Afr/Ap 28 Oct-30 Oct 010/015-010/012-005/008
VI. Geomagnetic Activity Probabilities 28 Oct to 30 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 15% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 05% | 05% | 01% |
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