Viewing archive of Sunday, 25 November 2007
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 2007 Nov 25 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 329 Issued at 2200Z on 25 Nov 2007IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was quiet to unsettled. Solar wind
observations from the Ace spacecraft show continued presence of the
recurrent coronal hole high speed stream. Solar wind velocity
averaged between 580-620 km/s with Bz fluctuations +/- 4 nT. The
greater than 2 MeV electron flux at geosynchronous orbit reached
high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled on 26 November with quiet levels
returning on 27-28 November.
III. Event Probabilities 26 Nov to 28 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Nov 071 Predicted 26 Nov-28 Nov 070/070/070 90 Day Mean 25 Nov 068
V. Geomagnetic A Indices
Observed Afr/Ap 24 Nov 008/012 Estimated Afr/Ap 25 Nov 008/015 Predicted Afr/Ap 26 Nov-28 Nov 008/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 26 Nov to 28 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 05% | 01% | 01% |
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