Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 3 June 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 155 Issued at 2200Z on 03 Jun 2020

IA. Analysis of Solar Active Regions and Activity from 02/2100Z to 03/2100Z: 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 (04 Jun, 05 Jun, 06 Jun).

IIA. Geophysical Activity Summary 02/2100Z to 03/2100Z: The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 359 km/s at 03/0449Z. Total IMF reached 5 nT at 02/2100Z. The maximum southward component of Bz reached -4 nT at 03/0114Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 152 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (04 Jun, 05 Jun) and quiet to unsettled levels on day three (06 Jun).

III. Event probabilities 04 Jun-06 Jun
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 03 Jun 070
Predicted 04 Jun-06 Jun 070/070/070
90 Day Mean 03 Jun 070

V. Geomagnetic A Indices
Observed Afr/Ap 02 Jun 007/007
Estimated Afr/Ap 03 Jun 004/004
Predicted Afr/Ap 04 Jun-06 Jun 005/005-006/005-007/008

VI. Geomagnetic Activity Probabilities 04 Jun-06 Jun
A. Middle Latitudes
Active 10/10/10
Minor Storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 20/20/15
Minor Storm 20/20/25
Major-severe storm 10/10/10