Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 8 Aug 18:02

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 220 Issued at 2200Z on 08 Aug 2017

IA. Analysis of Solar Active Regions and Activity from 07/2100Z to 08/2100Z: 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 on days one, two, and three (09 Aug, 10 Aug, 11 Aug).

IIA. Geophysical Activity Summary 07/2100Z to 08/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 489 km/s at 08/0601Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 10425 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (09 Aug, 10 Aug) and quiet to unsettled levels on day three (11 Aug).

III. Event probabilities 09 Aug-11 Aug Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 08 Aug 071 Predicted 09 Aug-11 Aug 071/071/071 90 Day Mean 08 Aug 076

V. Geomagnetic A Indices Observed Afr/Ap 07 Aug 006/005 Estimated Afr/Ap 08 Aug 005/005 Predicted Afr/Ap 09 Aug-11 Aug 006/005-005/005-007/008

VI. Geomagnetic Activity Probabilities 09 Aug-11 Aug A. Middle Latitudes Active 10/10/20 Minor Storm 01/01/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/20/30 Major-severe storm 15/15/30

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