Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 6 Aug 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 218 Issued at 2200Z on 06 Aug 2017

IA. Analysis of Solar Active Regions and Activity from 05/2100Z to 06/2100Z: Solar activity has been at very low levels for the past 24 hours. There is 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 (07 Aug, 08 Aug, 09 Aug).

IIA. Geophysical Activity Summary 05/2100Z to 06/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 788 km/s at 05/2108Z. Total IMF reached 6 nT at 06/0547Z. The maximum southward component of Bz reached -5 nT at 06/0829Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 8649 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (07 Aug), quiet to active levels on day two (08 Aug) and quiet levels on day three (09 Aug).

III. Event probabilities 07 Aug-09 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 06 Aug 074 Predicted 07 Aug-09 Aug 074/074/074 90 Day Mean 06 Aug 075

V. Geomagnetic A Indices Observed Afr/Ap 05 Aug 017/016 Estimated Afr/Ap 06 Aug 012/014 Predicted Afr/Ap 07 Aug-09 Aug 008/008-008/010-007/008

VI. Geomagnetic Activity Probabilities 07 Aug-09 Aug A. Middle Latitudes Active 15/30/15 Minor Storm 05/10/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/30/25 Major-severe storm 25/40/25

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