Joint USAF/NOAA Report of Solar and Geophysical Activity 27 Jul 2008
Product: Report of Solar-Geophysical Activity
Issued: 2008 Jul 27 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 209 Issued at 2200Z on 27 Jul 2008
IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was very low. No flares were observed. The visible disk remained spotless.
IB. Solar Activity Forecast: Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: Geomagnetic field activity was at quiet levels. The greater than 2 MeV electron flux at geosynchronous orbit was high.
IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be at quiet levels during most of the period (28 – 30 July). However, there is a chance for unsettled levels early on 28 July.
III. Event Probabilities 28 Jul-30 Jul
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 27 Jul 066
- Predicted 28 Jul-30 Jul 066/066/066
- 90 Day Mean 27 Jul 067
V. Geomagnetic A Indices
- Observed Afr/Ap 26 Jul 004/005
- Estimated Afr/Ap 27 Jul 005/005
- Predicted Afr/Ap 28 Jul-30 Jul 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 28 Jul-30 Jul
A. Middle Latitudes
- Active 10/05/05
- Minor storm 01/01/01
- Major-severe storm 01/01/01
B. High Latitudes
- Active 15/10/10
- Minor storm 01/01/01
- Major-severe storm 01/01/01