Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 19 Mar 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 78 Issued at 2200Z on 19 Mar 2017

IA. Analysis of Solar Active Regions and Activity from 18/2100Z to 19/2100Z: 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 (20 Mar, 21 Mar, 22 Mar).

IIA. Geophysical Activity Summary 18/2100Z to 19/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 330 km/s at 19/1355Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 865 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (20 Mar), quiet to unsettled levels on day two (21 Mar) and quiet to active levels on day three (22 Mar).

III. Event probabilities 20 Mar-22 Mar Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 19 Mar 071 Predicted 20 Mar-22 Mar 070/070/071 90 Day Mean 19 Mar 076

V. Geomagnetic A Indices Observed Afr/Ap 18 Mar 001/001 Estimated Afr/Ap 19 Mar 003/003 Predicted Afr/Ap 20 Mar-22 Mar 006/005-007/008-010/012

VI. Geomagnetic Activity Probabilities 20 Mar-22 Mar A. Middle Latitudes Active 10/15/20 Minor Storm 01/05/05 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 15/20/20 Major-severe storm 10/20/30


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