Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 10 Dec 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 344 Issued at 2200Z on 10 Dec 2017

IA. Analysis of Solar Active Regions and Activity from 09/2100Z to 10/2100Z: Solar activity has been at very low levels for the past 24 hours. There is currently 1 numbered sunspot region on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (11 Dec, 12 Dec, 13 Dec).

IIA. Geophysical Activity Summary 09/2100Z to 10/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 366 km/s at 09/2101Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 2473 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one, two, and three (11 Dec, 12 Dec, 13 Dec).

III. Event probabilities 11 Dec-13 Dec Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 10 Dec 072 Predicted 11 Dec-13 Dec 072/072/074 90 Day Mean 10 Dec 075

V. Geomagnetic A Indices Observed Afr/Ap 09 Dec 003/002 Estimated Afr/Ap 10 Dec 003/004 Predicted Afr/Ap 11 Dec-13 Dec 012/014-013/016-011/014

VI. Geomagnetic Activity Probabilities 11 Dec-13 Dec A. Middle Latitudes Active 25/25/25 Minor Storm 10/10/10 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 25/30/25 Major-severe storm 35/35/35


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