Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 21 March 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 81 Issued at 2200Z on 21 Mar 2020

IA. Analysis of Solar Active Regions and Activity from 20/2100Z to 21/2100Z: 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 (22 Mar, 23 Mar, 24 Mar).

IIA. Geophysical Activity Summary 20/2100Z to 21/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 525 km/s at 21/0957Z. Total IMF reached 7 nT at 21/0237Z. The maximum southward component of Bz reached -4 nT at 21/0414Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 264 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (22 Mar, 23 Mar) and quiet levels on day three (24 Mar).

III. Event probabilities 22 Mar-24 Mar
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 21 Mar 071
Predicted 22 Mar-24 Mar 071/071/071
90 Day Mean 21 Mar 071

V. Geomagnetic A Indices
Observed Afr/Ap 20 Mar 005/007
Estimated Afr/Ap 21 Mar 008/008
Predicted Afr/Ap 22 Mar-24 Mar 008/008-008/008-006/005

VI. Geomagnetic Activity Probabilities 22 Mar-24 Mar
A. Middle Latitudes
Active 20/15/10
Minor Storm 05/05/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/15
Minor Storm 25/25/15
Major-severe storm 30/20/10