Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 24 August 2016

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 237 Issued at 2200Z on 24 Aug 2016

IA. Analysis of Solar Active Regions and Activity from 23/2100Z to 24/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 3 numbered sunspot regions on the disk.

IB. Solar Activity Forecast: Solar activity is expected to be very low with a chance for a C-class flares on day one (25 Aug) and expected to be very low with a slight chance for a C-class flare on days two and three (26 Aug, 27 Aug).

IIA. Geophysical Activity Summary 23/2100Z to 24/2100Z: The geomagnetic field has been at quiet to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 690 km/s at 24/0148Z. Total IMF reached 17 nT at 23/2254Z. The maximum southward component of Bz reached -9 nT at 23/2341Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 107 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (25 Aug, 26 Aug) and quiet levels on day three (27 Aug).

III. Event probabilities 25 Aug-27 Aug
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 24 Aug 078
Predicted 25 Aug-27 Aug 080/080/075
90 Day Mean 24 Aug 084

V. Geomagnetic A Indices
Observed Afr/Ap 23 Aug 012/018
Estimated Afr/Ap 24 Aug 018/022
Predicted Afr/Ap 25 Aug-27 Aug 009/010-006/006-005/005

VI. Geomagnetic Activity Probabilities 25 Aug-27 Aug
A. Middle Latitudes
Active 15/10/10
Minor Storm 05/05/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor Storm 20/20/15
Major-severe storm 15/15/10