Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 15 Oct 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 288 Issued at 2200Z on 15 Oct 2017

IA. Analysis of Solar Active Regions and Activity from 14/2100Z to 15/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 1 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (16 Oct, 17 Oct, 18 Oct).

IIA. Geophysical Activity Summary 14/2100Z to 15/2100Z: The geomagnetic field has been at unsettled to minor storm levels for the past 24 hours. Solar wind speed reached a peak of 699 km/s at 15/0157Z. Total IMF reached 5 nT at 15/1650Z. The maximum southward component of Bz reached -5 nT at 15/0006Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 59298 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to active levels on day one (16 Oct), quiet to unsettled levels on day two (17 Oct) and quiet to active levels on day three (18 Oct).

III. Event probabilities 16 Oct-18 Oct Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 15 Oct 070 Predicted 16 Oct-18 Oct 070/070/070 90 Day Mean 15 Oct 081

V. Geomagnetic A Indices Observed Afr/Ap 14 Oct 026/027 Estimated Afr/Ap 15 Oct 020/028 Predicted Afr/Ap 16 Oct-18 Oct 014/018-008/010-011/012

VI. Geomagnetic Activity Probabilities 16 Oct-18 Oct A. Middle Latitudes Active 25/20/30 Minor Storm 05/05/15 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/10 Minor Storm 30/25/25 Major-severe storm 35/30/45


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