Joint USAF/NOAA Report of Solar and Geophysical Activity 04 Apr 2007
Product: Report of Solar-Geophysical Activity
Issued: 2007 Apr 04 2246 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.
Joint USAF/NOAA Report of Solar and Geophysical Activity
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SDF Number 094 Issued at 2200Z on 04 Apr 2007
IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity has been very low.
IB. Solar Activity Forecast: Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic field was quiet to unsettled with an isolated active period. 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 quiet April 5 – 7.
III. Event Probabilities 05 Apr-07 Apr
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 04 Apr 071
- Predicted 05 Apr-07 Apr 072/072/072
- 90 Day Mean 04 Apr 077
V. Geomagnetic A Indices
- Observed Afr/Ap 03 Apr 010/011
- Estimated Afr/Ap 04 Apr 006/008
- Predicted Afr/Ap 05 Apr-07 Apr 004/005-004/005-004/005
VI. Geomagnetic Activity Probabilities 05 Apr-07 Apr
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 05/05/05