From: Space Weather Prediction Center (NOAA)
Posted: Wednesday, May 30, 2018
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast SDF Number 150 Issued at 2200Z on 30 May 2018 IA. Analysis of Solar Active Regions and Activity from 29/2100Z to 30/2100Z: 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 slight chance for a C-class flare on days one, two, and three (31 May, 01 Jun, 02 Jun). IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 389 km/s at 30/1825Z. Total IMF reached 5 nT at 30/1352Z. The maximum southward component of Bz reached -2 nT at 30/0412Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 135 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (31 May), quiet to minor storm levels on day two () and unsettled to minor storm levels on day three ( ). III. Event probabilities Class M 01/01/01 Class X 01/01/01 Proton 01/01/01 PCAF green IV. Penticton 10.7 cm Flux Observed 30 May 075 Predicted 075/074/073 90 Day Mean 30 May 070 V. Geomagnetic A Indices Observed Afr/Ap 29 May 005/004 Estimated Afr/Ap 30 May 004/004 Predicted Afr/Ap 006/005-012/016-019/026 VI. Geomagnetic Activity Probabilities A. Middle Latitudes Active 10/35/35 Minor Storm 01/25/30 Major-severe storm 01/10/10 B. High Latitudes Active 15/10/10 Minor Storm 20/25/20 Major-severe storm 10/60/65
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