| Report of Solar-Geophysical Activity Issued: 2007 Mar 12 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 071 Issued at 2200Z on 12 Mar 2007 IA. Analysis of Solar Active Regions and Activity from 11/2100Z to 12/2100Z: Solar activity remained at very low levels. No flares were recorded during the period. Region 946 (N10W72) underwent decay and is classified as an Hsx alpha sunspot group. No new regions were numbered today. IB. Solar Activity Forecast: Solar activity is expected to remain at very low levels. IIA. Geophysical Activity Summary 11/2100Z to 12/2100Z: The geomagnetic field was at quiet to active levels. The elevated conditions were due to the onset of a recurrent coronal hole high speed stream. Solar wind speeds have steadily increased to approximately 570 km/sec at the time of this writing. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to range from quiet to active levels. Isolated minor storm conditions are possible on 13 March due to a recurrent coronal hole. Predominantly unsettled to active levels are expected on 14 March. A return to quiet to unsettled conditions are expected on 15 March as the coronal hole 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 071 Predicted 13 Mar-15 Mar 070/070/070 90 Day Mean 12 Mar 079 V. Geomagnetic A Indices Observed Afr/Ap 11 Mar 006/008 Estimated Afr/Ap 12 Mar 006/008 Predicted Afr/Ap 13 Mar-15 Mar 015/020-010/015-006/010 VI. Geomagnetic Activity Probabilities 13 Mar-15 Mar A. Middle Latitudes Active 30/20/15 Minor storm 15/10/05 Major-severe storm 10/05/01 B. High Latitudes Active 40/30/20 Minor storm 20/15/10 Major-severe storm 15/10/05
For current space weather conditions please refer to: http://www.sec.noaa.gov/alerts/NOAA Space Weather Scale descriptions can be found at www.sec.noaa.gov/NOAAscales
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