:Product: 0729RSGA.txt :Issued: 2013 Jul 29 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 Solar Geophysical Activity Report and Forecast SDF Number 210 Issued at 2200Z on 29 Jul 2013 IA. Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C2 event observed at 29/1651Z from Region 1800 (S08W84). There are currently 6 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is likely to be low with a slight chance for an M-class flare on days one, two, and three (30 Jul, 31 Jul, 01 Aug). IIA. Geophysical Activity Summary 28/2100Z to 29/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 468 km/s at 28/2240Z. Total IMF reached 5 nT at 29/1301Z. The maximum southward component of Bz reached -3 nT at 29/0126Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1035 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (30 Jul, 31 Jul, 01 Aug). III. Event probabilities 30 Jul-01 Aug Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 29 Jul 112 Predicted 30 Jul-01 Aug 115/120/125 90 Day Mean 29 Jul 119 V. Geomagnetic A Indices Observed Afr/Ap 28 Jul 008/007 Estimated Afr/Ap 29 Jul 005/005 Predicted Afr/Ap 30 Jul-01 Aug 004/005-004/005-006/005 VI. Geomagnetic Activity Probabilities 30 Jul-01 Aug A. Middle Latitudes Active 10/10/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/20/20 Major-severe storm 10/10/10