- Status Report
- Jan 31, 2023
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 26 June 2017
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 177 Issued at 2200Z on 26 Jun 2017
IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: 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 (27 Jun, 28 Jun, 29 Jun).
IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 611 km/s at 26/1310Z. Total IMF reached 7 nT at 25/2237Z. The maximum southward component of Bz reached -5 nT at 26/0307Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 227 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (27 Jun, 28 Jun) and quiet to unsettled levels on day three (29 Jun).
III. Event probabilities 27 Jun-29 Jun
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 26 Jun 074
Predicted 27 Jun-29 Jun 075/075/077
90 Day Mean 26 Jun 077
V. Geomagnetic A Indices
Observed Afr/Ap 25 Jun 011/012
Estimated Afr/Ap 26 Jun 007/008
Predicted Afr/Ap 27 Jun-29 Jun 006/005-006/005-008/010
VI. Geomagnetic Activity Probabilities 27 Jun-29 Jun
A. Middle Latitudes
Minor Storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 10/10/25
Major-severe storm 05/05/20