:Product: 0204RSGA.txt :Issued: 2013 Feb 04 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 35 Issued at 2200Z on 04 Feb 2013 IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C2/Sf flare with an associated Type II (estimated velocity of 849 km/s) observed at 04/1459Z from an unnumbered region that recently rotated around the eastern limb. This region was not numbered due to the close proximity to the limb. There are currently 2 numbered sunspot regions on the disk and no Earth-directed coronal mass ejections expected. IB. Solar Activity Forecast: Solar activity is expected to be at low levels on days one, two, and three (05 Feb, 06 Feb, 07 Feb). IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: 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 439 km/s at 03/2108Z. Total IMF reached 6 nT at 04/1630Z. The maximum southward component of Bz reached -3.8 nT at 04/1632Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 204 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels for the next three days (05 Feb, 06 Feb, 07 Feb). III. Event probabilities 05 Feb-07 Feb Class M 10/10/10 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 04 Feb 107 Predicted 05 Feb-07 Feb 105/105/105 90 Day Mean 04 Feb 120 V. Geomagnetic A Indices Observed Afr/Ap 03 Feb 006/002 Estimated Afr/Ap 04 Feb 003/004 Predicted Afr/Ap 05 Feb-07 Feb 006/005-006/005-006/005 VI. Geomagnetic Activity Probabilities 05 Feb-07 Feb 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 15/15/15 Major-severe storm 10/10/10