Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 27 March 2020

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 87 Issued at 2200Z on 27 Mar 2020

IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: 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 (28 Mar, 29 Mar, 30 Mar).

IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 431 km/s at 27/1259Z. Total IMF reached 5 nT at 26/2157Z. The maximum southward component of Bz reached -4 nT at 26/2156Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 791 pfu.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (28 Mar, 29 Mar) and quiet to active levels on day three (30 Mar).

III. Event probabilities 28 Mar-30 Mar
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 27 Mar 069
Predicted 28 Mar-30 Mar 070/070/070
90 Day Mean 27 Mar 071

V. Geomagnetic A Indices
Observed Afr/Ap 26 Mar 005/004
Estimated Afr/Ap 27 Mar 005/005
Predicted Afr/Ap 28 Mar-30 Mar 006/005-006/005-009/012

VI. Geomagnetic Activity Probabilities 28 Mar-30 Mar
A. Middle Latitudes
Active 10/10/40
Minor Storm 01/01/15
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/10
Minor Storm 15/15/30
Major-severe storm 10/10/55