Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 18 June 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 170 Issued at 2200Z on 18 Jun 2020

IA. Analysis of Solar Active Regions and Activity from 17/2100Z to 18/2100Z: 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 (19 Jun, 20 Jun, 21 Jun).

IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 311 km/s at 18/0840Z. Total IMF reached 6 nT at 18/2057Z. The maximum southward component of Bz reached -6 nT at 18/0842Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 217 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one, two, and three (19 Jun, 20 Jun, 21 Jun).

III. Event probabilities 19 Jun-21 Jun
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 18 Jun 068
Predicted 19 Jun-21 Jun 070/070/070
90 Day Mean 18 Jun 070

V. Geomagnetic A Indices
Observed Afr/Ap 17 Jun 005/004
Estimated Afr/Ap 18 Jun 005/005
Predicted Afr/Ap 19 Jun-21 Jun 006/005-006/005-006/005

VI. Geomagnetic Activity Probabilities 19 Jun-21 Jun
A. Middle Latitudes
Active 05/05/05
Minor Storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor Storm 15/15/15
Major-severe storm 10/10/10