Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 3 Apr 2018

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 93 Issued at 2200Z on 03 Apr 2018

IA. Analysis of Solar Active Regions and Activity from 02/2100Z to 03/2100Z: 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 (04 Apr, 05 Apr, 06 Apr).

IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 438 km/s at 02/2117Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 1908 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (04 Apr) and quiet to unsettled levels on days two and three (05 Apr, 06 Apr).

III. Event probabilities 04 Apr-06 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 03 Apr 068 Predicted 04 Apr-06 Apr 068/068/068 90 Day Mean 03 Apr 070

V. Geomagnetic A Indices Observed Afr/Ap 02 Apr 004/004 Estimated Afr/Ap 03 Apr 006/006 Predicted Afr/Ap 04 Apr-06 Apr 006/005-007/008-007/008

VI. Geomagnetic Activity Probabilities 04 Apr-06 Apr A. Middle Latitudes Active 10/25/25 Minor Storm 01/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 20/20/20 Minor Storm 20/30/30 Major-severe storm 10/25/25

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