- Status Report
- Jan 30, 2023
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 25 July 2017
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 206 Issued at 2200Z on 25 Jul 2017
IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: 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 on days one, two, and three (26 Jul, 27 Jul, 28 Jul).
IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 705 km/s at 24/2219Z. Total IMF reached 8 nT at 25/1954Z. The maximum southward component of Bz reached -4 nT at 25/1031Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 2 pfu at 25/1930Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 18832 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on day one (26 Jul) and quiet levels on days two and three (27 Jul, 28 Jul).
III. Event probabilities 26 Jul-28 Jul
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 25 Jul 070
Predicted 26 Jul-28 Jul 070/070/071
90 Day Mean 25 Jul 076
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jul 013/011
Estimated Afr/Ap 25 Jul 007/007
Predicted Afr/Ap 26 Jul-28 Jul 008/008-006/005-006/005
VI. Geomagnetic Activity Probabilities 26 Jul-28 Jul
A. Middle Latitudes
Minor Storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 25/20/20
Major-severe storm 15/10/10