:Product: 0324RSGA.txt :Issued: 2007 Mar 24 2203 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 083 Issued at 2200Z on 24 Mar 2007 IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity was very low. Region 947 (S14W74) has decayed into a unipolar sunspot. IB. Solar Activity Forecast: Solar activity is expected to be very low. IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field ranged from quiet to minor storm levels. Minor storming was observed at all latitudes as the Bz component of the IMF went southward for approximately 20 hours starting late on 23 March. Solar wind speed experienced a modest increase from about 250 km/s to 360 km/s. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with isolated active periods for the next two days due to a recurrent coronal hole high speed stream. Expect unsettled to active with isolated minor storm periods on 27 March. III. Event Probabilities 25 Mar-27 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 24 Mar 073 Predicted 25 Mar-27 Mar 073/073/075 90 Day Mean 24 Mar 078 V. Geomagnetic A Indices Observed Afr/Ap 23 Mar 007/010 Estimated Afr/Ap 24 Mar 020/024 Predicted Afr/Ap 25 Mar-27 Mar 008/008-010/015-012/020 VI. Geomagnetic Activity Probabilities 25 Mar-27 Mar A. Middle Latitudes Active 20/25/25 Minor storm 05/10/15 Major-severe storm 01/01/01 B. High Latitudes Active 25/30/40 Minor storm 05/20/25 Major-severe storm 01/10/15