Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 90 Issued at 2200Z on 31 Mar 2018
IA. Analysis of Solar Active Regions and Activity from 30/2100Z to 31/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low with a slight chance for a C-class flare on days one, two, and three (01 Apr, 02 Apr, 03 Apr).
IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 469 km/s at 31/0016Z. Total IMF reached 7 nT at 31/0105Z. The maximum southward component of Bz reached -5 nT at 31/0001Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 9268 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (01 Apr, 02 Apr, 03 Apr).
III. Event probabilities 01 Apr-03 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green
IV. Penticton 10.7 cm Flux Observed 31 Mar 069 Predicted 01 Apr-03 Apr 069/069/069 90 Day Mean 31 Mar 070
V. Geomagnetic A Indices Observed Afr/Ap 30 Mar 004/003 Estimated Afr/Ap 31 Mar 008/008 Predicted Afr/Ap 01 Apr-03 Apr 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 01 Apr-03 Apr A. Middle Latitudes Active 10/10/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/20/20 Minor Storm 20/20/20 Major-severe storm 15/10/10