Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 30 January 2018
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 30 Issued at 2200Z on 30 Jan 2018
IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: 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 (31 Jan, 01 Feb, 02 Feb).
IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 354 km/s at 30/0816Z. Total IMF reached 5 nT at 30/0115Z. The maximum southward component of Bz reached -5 nT at 30/0558Z.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (31 Jan) and quiet levels on days two and three (01 Feb, 02 Feb).
III. Event probabilities 31 Jan-02 Feb
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 30 Jan 069
Predicted 31 Jan-02 Feb 070/070/070
90 Day Mean 30 Jan 071
V. Geomagnetic A Indices
Observed Afr/Ap 29 Jan 003/002
Estimated Afr/Ap 30 Jan 006/006
Predicted Afr/Ap 31 Jan-02 Feb 008/008-006/005-005/005
VI. Geomagnetic Activity Probabilities 31 Jan-02 Feb
A. Middle Latitudes
Active 15/15/10
Minor Storm 05/05/01
Major-severe storm 01/01/01
B. High Latitudes
Active 20/15/15
Minor Storm 20/20/15
Major-severe storm 20/20/15