:Product: 0602RSGA.txt :Issued: 2013 Jun 02 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 153 Issued at 2200Z on 02 Jun 2013 IA. Analysis of Solar Active Regions and Activity from 01/2100Z to 02/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C1 event observed at 02/0520Z from Region 1762 (S29W22). There are currently 5 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 (03 Jun, 04 Jun, 05 Jun). IIA. Geophysical Activity Summary 01/2100Z to 02/2100Z: The geomagnetic field has been at unsettled to minor storm levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 822 km/s at 02/1127Z. Total IMF reached 14 nT at 01/2339Z. The maximum southward component of Bz reached -10 nT at 02/0143Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 4708 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (03 Jun) and quiet levels on days two and three (04 Jun, 05 Jun). III. Event probabilities 03 Jun-05 Jun Class M 20/20/20 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 02 Jun 111 Predicted 03 Jun-05 Jun 115/120/125 90 Day Mean 02 Jun 123 V. Geomagnetic A Indices Observed Afr/Ap 01 Jun 041/058 Estimated Afr/Ap 02 Jun 015/019 Predicted Afr/Ap 03 Jun-05 Jun 013/012-007/008-005/005 VI. Geomagnetic Activity Probabilities 03 Jun-05 Jun A. Middle Latitudes Active 30/15/10 Minor Storm 10/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 30/25/20 Major-severe storm 40/25/15