Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Feb 2008
Product: Report of Solar-Geophysical Activity
Issued: 2008 Feb 25 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 056 Issued at 2200Z on 25 Feb 2008
IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low. New Region 983 (S01W39), currently classified as an Axx alpha group, was numbered today.
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. 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 on day one (26 February). Quiet to unsettled levels are expected on day two (27 February). Unsettled to active levels are expected on day three (28 February) with isolated minor storm conditions at high latitudes as a recurrent coronal hole becomes geoeffective.
III. Event Probabilities 26 Feb-28 Feb
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 25 Feb 071
- Predicted 26 Feb-28 Feb 070/070/070
- 90 Day Mean 25 Feb 075
V. Geomagnetic A Indices
- Observed Afr/Ap 24 Feb 002/003
- Estimated Afr/Ap 25 Feb 003/005
- Predicted Afr/Ap 26 Feb-28 Feb 005/005-007/008-010/015
VI. Geomagnetic Activity Probabilities 26 Feb-28 Feb
A. Middle Latitudes
- Active 10/10/15
- Minor storm 05/05/10
- Major-severe storm 01/01/05
B. High Latitudes
- Active 10/15/25
- Minor storm 05/10/15
- Major-severe storm 01/05/10
