Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 6 Dec 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 340 Issued at 2200Z on 06 Dec 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 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 (07 Dec, 08 Dec, 09 Dec).

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 636 km/s at 06/0323Z. Total IMF reached 6 nT at 06/0734Z. The maximum southward component of Bz reached -5 nT at 06/0409Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 3260 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (07 Dec), quiet to unsettled levels on day two (08 Dec) and quiet levels on day three (09 Dec).

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

IV. Penticton 10.7 cm Flux Observed 06 Dec 068 Predicted 07 Dec-09 Dec 068/068/068 90 Day Mean 06 Dec 076

V. Geomagnetic A Indices Observed Afr/Ap 05 Dec 021/024 Estimated Afr/Ap 06 Dec 014/019 Predicted Afr/Ap 07 Dec-09 Dec 010/012-007/008-006/005

VI. Geomagnetic Activity Probabilities 07 Dec-09 Dec A. Middle Latitudes Active 25/15/10 Minor Storm 10/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/20/15 Minor Storm 25/20/15 Major-severe storm 35/20/10


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