Viewing archive of Saturday, 21 October 2006
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 2006 Oct 21 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 294 Issued at 2200Z on 21 Oct 2006IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity has been very low. Region 917 (S05W33),
now spot class Cso with an expanded area, has been exhibiting
enhanced x-ray flux for the past eight hours and continues to do so
at time of issue.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field has ranged from quiet to active. Solar wind
speed is elevated and currently 625 km/s due to a coronal hole high
speed stream. The greater than 2 MeV electron flux briefly reached
high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled to active on 22 October due to a recurrent
coronal hole high speed stream. Expect quiet to unsettled
conditions for 23 and 24 October.
III. Event Probabilities 22 Oct to 24 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Oct 075 Predicted 22 Oct-24 Oct 075/075/075 90 Day Mean 21 Oct 077
V. Geomagnetic A Indices
Observed Afr/Ap 20 Oct 009/010 Estimated Afr/Ap 21 Oct 010/015 Predicted Afr/Ap 22 Oct-24 Oct 010/015-005/005-004/005
VI. Geomagnetic Activity Probabilities 22 Oct to 24 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 25% |
| Minor storm | 20% | 15% | 15% |
| Major-severe storm | 10% | 05% | 05% |
All times in UTC
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