- Press Release
- Nov 29, 2022
Joint USAF/NOAA Report of Solar and Geophysical Activity 04 Apr 2006
Product: Report of Solar-Geophysical Activity
Issued: 2006 Apr 04 2200 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
SDF Number 094 Issued at 2200Z on 04 Apr 2006
IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity was low. Region 865 (S11W35) produced a C4 flare at 03/2126 UTC. The penumbral area of the two major leading spots has merged in this region. The trailing spots appear to be in decay. This region is classified as a beta gamma magnetic group.
IB. Solar Activity Forecast: Solar activity is expected to be low to moderate. An isolated M-class flare is possible from Region 865.
IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with isolated active periods possible on 05 and 06 April due to a coronal hole high speed stream. Quiet to unsettled conditions are expected on 07 April.
III. Event Probabilities 05 Apr-07 Apr
- Class M 20/25/25
- Class X 01/05/05
- Proton 01/01/01
- PCAF green
IV. Penticton 10.7 cm Flux
- Observed 04 Apr 100
- Predicted 05 Apr-07 Apr 100/100/100
- 90 Day Mean 04 Apr 079
V. Geomagnetic A Indices
- Observed Afr/Ap 03 Apr 001/001
- Estimated Afr/Ap 04 Apr 005/008
- Predicted Afr/Ap 05 Apr-07 Apr 008/012-008/012-005/010
VI. Geomagnetic Activity Probabilities 05 Apr-07 Apr A. Middle Latitudes
- Active 20/20/15
- Minor storm 10/10/05
- Major-severe storm 01/01/01
B. High Latitudes
- Active 25/25/20
- Minor storm 15/15/10
- Major-severe storm 05/05/01