Joint USAF/NOAA Report of Solar and Geophysical Activity 20 Jun 2007
Product: Report of Solar-Geophysical Activity
Issued: 2007 Jun 20 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 171 Issued at 2200Z on 20 Jun 2007
IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity was very low. The visible disk remains spotless.
IB. Solar Activity Forecast: Solar activity is expected to remain very low.
IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: 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 range from unsettled to minor storm levels on 21-22 June, in response to a recurrent coronal hole high speed stream. Isolated major storm periods are possible at high latitudes. Conditions diminish to unsettled on 23 June.
III. Event Probabilities 21 Jun-23 Jun
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 20 Jun 066
- Predicted 21 Jun-23 Jun 068/068/070
- 90 Day Mean 20 Jun 074
V. Geomagnetic A Indices
- Observed Afr/Ap 19 Jun 005/007
- Estimated Afr/Ap 20 Jun 006/010
- Predicted Afr/Ap 21 Jun-23 Jun 015/020-010/015-008/010
VI. Geomagnetic Activity Probabilities 21 Jun-23 Jun
A. Middle Latitudes
- Active 30/25/20
- Minor storm 20/15/10
- Major-severe storm 10/05/01
B. High Latitudes
- Active 35/30/20
- Minor storm 25/20/15
- Major-severe storm 15/10/05