Viewing archive of Tuesday, 20 March 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 Mar 20 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 079 Issued at 2200Z on 20 Mar 2007IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity was at very low levels. No flare
activity was reported during the period. No new regions were
numbered today.
IB. Solar Activity Forecast
Solar activity is expected to remain
at very low levels.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic field was at quiet levels. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels again
today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels through 21 and 22 March.
Isolated active periods are possible on 23 March due to a recurrent
coronal hole high speed stream. Higher latitudes may experience
brief periods of minor storm conditions with the onset of the
anticipated coronal hole.
III. Event Probabilities 21 Mar to 23 Mar
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Mar 073 Predicted 21 Mar-23 Mar 075/075/075 90 Day Mean 20 Mar 078
V. Geomagnetic A Indices
Observed Afr/Ap 19 Mar 001/002 Estimated Afr/Ap 20 Mar 002/005 Predicted Afr/Ap 21 Mar-23 Mar 005/005-005/005-008/010
VI. Geomagnetic Activity Probabilities 21 Mar to 23 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 25% |
| Minor storm | 01% | 01% | 15% |
| Major-severe storm | 01% | 01% | 05% |
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