Viewing archive of Wednesday, 26 November 2008
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 2008 Nov 26 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 331 Issued at 2200Z on 26 Nov 2008IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z
Solar activity was very low. No flares were observed
during the past 24 hours. The visible disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field ranged from quiet to active conditions. Solar
wind observations from the ACE spacecraft indicated a continued
influence of the coronal hole high speed stream. Solar wind
velocities reached a maximum of 651 km/s near the end of the
period. The Interplanetary Magnetic Field (IMF) Bt ranged from +6 to
-5.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled on 26 November. Quiet conditions
should return on 26-27 November as the high speed solar stream
subsides.
III. Event Probabilities 27 Nov to 29 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Nov 068 Predicted 27 Nov-29 Nov 069/069/069 90 Day Mean 26 Nov 068
V. Geomagnetic A Indices
Observed Afr/Ap 25 Nov 011/010 Estimated Afr/Ap 26 Nov 010/012 Predicted Afr/Ap 27 Nov-29 Nov 007/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 27 Nov to 29 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 05% | 05% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 05% | 05% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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