:Product: 0727RSGA.txt :Issued: 2014 Jul 27 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 208 Issued at 2200Z on 27 Jul 2014 IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: 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 27/0551Z from Region 2125 (S13E57). There are currently 7 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 (28 Jul, 29 Jul, 30 Jul). IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 400 km/s at 26/2258Z. Total IMF reached 7 nT at 27/2054Z. The maximum southward component of Bz reached -6 nT at 26/2348Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (28 Jul), quiet to unsettled levels on day two (29 Jul) and quiet levels on day three (30 Jul). III. Event probabilities 28 Jul-30 Jul Class M 15/15/15 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 27 Jul 121 Predicted 28 Jul-30 Jul 130/135/135 90 Day Mean 27 Jul 129 V. Geomagnetic A Indices Observed Afr/Ap 26 Jul 009/007 Estimated Afr/Ap 27 Jul 005/005 Predicted Afr/Ap 28 Jul-30 Jul 009/012-007/010-006/005 VI. Geomagnetic Activity Probabilities 28 Jul-30 Jul A. Middle Latitudes Active 30/25/10 Minor Storm 10/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/20/15 Major-severe storm 20/20/15