Report of Solar Geophysical Activity (RSGA)

By Newsroom America Feeds at 4 Jun 2017

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 155 Issued at 2200Z on 04 Jun 2017

IA. Analysis of Solar Active Regions and Activity from 03/2100Z to 04/2100Z: 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 with a chance for a C-class flares and a slight chance for an M-class flare on day one (05 Jun) and expected to be very low with a chance for a C-class flares on days two and three (06 Jun, 07 Jun).

IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 503 km/s at 04/0131Z. Total IMF reached 6 nT at 03/2141Z. The maximum southward component of Bz reached -2 nT at 03/2126Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 224 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (05 Jun, 06 Jun, 07 Jun).

III. Event probabilities 05 Jun-07 Jun Class M 10/05/01 Class X 01/01/01 Proton 01/01/01 PCAF green

IV. Penticton 10.7 cm Flux Observed 04 Jun 078 Predicted 05 Jun-07 Jun 078/078/078 90 Day Mean 04 Jun 076

V. Geomagnetic A Indices Observed Afr/Ap 03 Jun 009/010 Estimated Afr/Ap 04 Jun 003/003 Predicted Afr/Ap 05 Jun-07 Jun 005/005-005/005-006/005

VI. Geomagnetic Activity Probabilities 05 Jun-07 Jun A. Middle Latitudes Active 10/10/10 Minor Storm 01/01/01 Major-severe storm 01/01/01 B. High Latitudes Active 15/15/15 Minor Storm 20/15/15 Major-severe storm 20/10/10

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