Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 7 Apr 2018

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 97 Issued at 2200Z on 07 Apr 2018

IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: 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 (08 Apr, 09 Apr, 10 Apr).

IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 383 km/s at 07/1948Z. Total IMF reached 5 nT at 07/1809Z. The maximum southward component of Bz reached -3 nT at 07/2029Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 314 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (08 Apr, 09 Apr) and quiet to minor storm levels on day three (10 Apr).

III. Event probabilities 08 Apr-10 Apr Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 07 Apr 067 Predicted 08 Apr-10 Apr 067/067/067 90 Day Mean 07 Apr 070

V. Geomagnetic A Indices Observed Afr/Ap 06 Apr 003/003 Estimated Afr/Ap 07 Apr 005/005 Predicted Afr/Ap 08 Apr-10 Apr 006/005-006/005-012/015

VI. Geomagnetic Activity Probabilities 08 Apr-10 Apr A. Middle Latitudes Active 10/10/40 Minor Storm 01/01/25 Major-severe storm 01/01/05 B. High Latitudes Active 15/15/10 Minor Storm 15/15/30 Major-severe storm 15/15/55

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