Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 28 Mar 2018

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 87 Issued at 2200Z on 28 Mar 2018

IA. Analysis of Solar Active Regions and Activity from 27/2100Z to 28/2100Z: 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 (29 Mar, 30 Mar, 31 Mar).

IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 509 km/s at 27/2101Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 42064 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (29 Mar, 30 Mar) and quiet to unsettled levels on day three (31 Mar).

III. Event probabilities 29 Mar-31 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 28 Mar 069 Predicted 29 Mar-31 Mar 069/070/070 90 Day Mean 28 Mar 070

V. Geomagnetic A Indices Observed Afr/Ap 27 Mar 007/008 Estimated Afr/Ap 28 Mar 003/004 Predicted Afr/Ap 29 Mar-31 Mar 013/015-011/012-007/008

VI. Geomagnetic Activity Probabilities 29 Mar-31 Mar A. Middle Latitudes Active 30/30/15 Minor Storm 15/10/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/20 Minor Storm 30/30/25 Major-severe storm 40/35/20

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