- Status Report
- Jan 31, 2023
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 27 June 2017
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 178 Issued at 2200Z on 27 Jun 2017
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 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 (28 Jun, 29 Jun, 30 Jun).
IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 548 km/s at 26/2205Z. Total IMF reached 6 nT at 26/2132Z. The maximum southward component of Bz reached -3 nT at 27/1648Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 490 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on day one (28 Jun) and quiet to unsettled levels on days two and three (29 Jun, 30 Jun).
III. Event probabilities 28 Jun-30 Jun
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 27 Jun 074
Predicted 28 Jun-30 Jun 075/075/075
90 Day Mean 27 Jun 077
V. Geomagnetic A Indices
Observed Afr/Ap 26 Jun 009/007
Estimated Afr/Ap 27 Jun 006/006
Predicted Afr/Ap 28 Jun-30 Jun 006/005-008/010-009/010
VI. Geomagnetic Activity Probabilities 28 Jun-30 Jun
A. Middle Latitudes
Minor Storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 10/25/25
Major-severe storm 05/20/20