Joint USAF/NOAA Report of Solar and Geophysical Activity 12 Mar 2008
Product: Report of Solar-Geophysical Activity
Issued: 2008 Mar 12 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 072 Issued at 2200Z on 12 Mar 2008
IA. Analysis of Solar Active Regions and Activity from 11/2100Z to 12/2100Z: Solar activity was very low. The visible solar disk was spotless.
IB. Solar Activity Forecast: Solar activity is expected to remain very low.
IIA. Geophysical Activity Summary 11/2100Z to 12/2100Z: The geomagnetic field was quiet to active under the continued influence of a recurrent coronal hole high speed stream. Solar wind speed at ACE occasionally reached 700 km/s during the 24 hour period. The greater than 2 MeV electrons at geosynchronous orbit remained at high levels.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to remain at unsettled to occasionally active levels, with a chance for minor storms at high latitudes, during days 1 and 2 (13-14 March), Day 3 (15 Mar) is expected to be mostly quiet as the high speed stream wanes.
III. Event Probabilities 13 Mar-15 Mar
- Class M 01/01/01
- Class X 01/01/01
- Proton 01/01/01
- PCAF Green
IV. Penticton 10.7 cm Flux
- Observed 12 Mar 069
- Predicted 13 Mar-15 Mar 070/070/070
- 90 Day Mean 12 Mar 073
V. Geomagnetic A Indices
- Observed Afr/Ap 11 Mar 007/012
- Estimated Afr/Ap 12 Mar 010/012
- Predicted Afr/Ap 13 Mar-15 Mar 008/010-008/008-005/005
VI. Geomagnetic Activity Probabilities 13 Mar-15 Mar
A. Middle Latitudes
- Active 25/25/10
- Minor storm 05/05/05
- Major-severe storm 01/01/01
B. High Latitudes
- Active 40/30/10
- Minor storm 10/10/05
- Major-severe storm 04/04/01
