Viewing archive of Tuesday, 13 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 13 2202 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 072 Issued at 2200Z on 13 Mar 2007IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z Solar activity was very low. Region 946 (N05W88)
decayed into a plage region without spots. The visible solar disk
is now spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
The geomagnetic field ranged from quiet to active with minor storming
observed at mid and high latitudes early on 13 March due to a
coronal hole high speed stream. Solar wind speed has been steadily
increasing since 11 March and is now approximately 700 km/s.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for the next three days (14 - 16
March), with possible active periods on 14 March due to the coronal
hole high speed stream.
III. Event Probabilities 14 Mar to 16 Mar
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 13 Mar 071 Predicted 14 Mar-16 Mar 070/070/070 90 Day Mean 13 Mar 079
V. Geomagnetic A Indices
Observed Afr/Ap 12 Mar 007/009 Estimated Afr/Ap 13 Mar 015/023 Predicted Afr/Ap 14 Mar-16 Mar 010/015-006/010-005/008
VI. Geomagnetic Activity Probabilities 14 Mar to 16 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 10% | 05% | 01% |
All times in UTC
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