Viewing archive of Thursday, 27 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 27 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 332 Issued at 2200Z on 27 Nov 2008IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity was very low. No flares were observed
during the past 24 hours. The visible disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was quiet to unsettled. Solar wind velocities
measured at the ACE satellite showed a steady decline during the
past 24 hours, ending the period at 487 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days (27-29 November) as the
high speed stream rotates out of geoeffective position. Isolated
unsettled conditions are possible at high latitudes during the
period.
III. Event Probabilities 28 Nov to 30 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Nov 068 Predicted 28 Nov-30 Nov 069/069/069 90 Day Mean 27 Nov 068
V. Geomagnetic A Indices
Observed Afr/Ap 26 Nov 011/008 Estimated Afr/Ap 27 Nov 007/008 Predicted Afr/Ap 28 Nov-30 Nov 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 28 Nov to 30 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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