Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 1 Jan 2018

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 1 Issued at 2200Z on 01 Jan 2018

IA. Analysis of Solar Active Regions and Activity from 31/2100Z to 01/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 0 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (02 Jan, 03 Jan, 04 Jan).

IIA. Geophysical Activity Summary 31/2100Z to 01/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 491 km/s at 01/1537Z. Total IMF reached 13 nT at 01/0253Z. The maximum southward component of Bz reached -11 nT at 01/0245Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 639 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on day one (02 Jan), quiet to unsettled levels on day two (03 Jan) and quiet levels on day three (04 Jan).

III. Event probabilities 02 Jan-04 Jan Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 01 Jan 069 Predicted 02 Jan-04 Jan 069/069/069 90 Day Mean 01 Jan 073

V. Geomagnetic A Indices Observed Afr/Ap 31 Dec 002/003 Estimated Afr/Ap 01 Jan 014/018 Predicted Afr/Ap 02 Jan-04 Jan 009/012-006/008-006/005

VI. Geomagnetic Activity Probabilities 02 Jan-04 Jan A. Middle Latitudes Active 25/15/10 Minor Storm 05/05/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/20/20 Minor Storm 30/25/20 Major-severe storm 30/20/10

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