Viewing archive of Wednesday, 21 February 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 Feb 21 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 052 Issued at 2200Z on 21 Feb 2007IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity was very low. Region 942 (S11E05) has
developed two trailer spots while retaining its beta magnetic
configuration. No spots are currently visible in Region 943
(S12W23).
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field was quiet. The greater than 2 MeV electron
flux at geosynchronous orbit was at high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet through 24 February.
III. Event Probabilities 22 Feb to 24 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Feb 075 Predicted 22 Feb-24 Feb 080/080/080 90 Day Mean 21 Feb 082
V. Geomagnetic A Indices
Observed Afr/Ap 20 Feb 001/002 Estimated Afr/Ap 21 Feb 002/005 Predicted Afr/Ap 22 Feb-24 Feb 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 22 Feb to 24 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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