:Product: 0320RSGA.txt :Issued: 2014 Mar 20 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 79 Issued at 2200Z on 20 Mar 2014 IA. Analysis of Solar Active Regions and Activity from 19/2100Z to 20/2100Z: Solar activity has been at moderate levels for the past 24 hours. The largest solar event of the period was an M1 event observed at 20/0356Z from Region 2010 (S15E25). There are currently 7 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (21 Mar, 22 Mar, 23 Mar). IIA. Geophysical Activity Summary 19/2100Z to 20/2100Z: 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 360 km/s at 20/0801Z. Total IMF reached 10 nT at 20/0820Z. The maximum southward component of Bz reached -7 nT at 20/0908Z. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (21 Mar, 22 Mar) and quiet to unsettled levels on day three (23 Mar). III. Event probabilities 21 Mar-23 Mar Class M 45/45/45 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 20 Mar 151 Predicted 21 Mar-23 Mar 150/150/145 90 Day Mean 20 Mar 157 V. Geomagnetic A Indices Observed Afr/Ap 19 Mar 002/003 Estimated Afr/Ap 20 Mar 005/005 Predicted Afr/Ap 21 Mar-23 Mar 006/005-006/005-008/008 VI. Geomagnetic Activity Probabilities 21 Mar-23 Mar A. Middle Latitudes Active 05/05/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 15/15/20 Major-severe storm 05/05/20