- Status Report
- Jan 30, 2023
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 26 July 2017
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 207 Issued at 2200Z on 26 Jul 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 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 (27 Jul, 28 Jul, 29 Jul).
IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field has been at quiet to active levels for the past 24 hours. Solar wind speed reached a peak of 664 km/s at 26/0129Z. Total IMF reached 7 nT at 26/0735Z. The maximum southward component of Bz reached -4 nT at 26/0826Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 2 pfu at 25/2225Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 13961 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (27 Jul, 28 Jul) and quiet levels on day three (29 Jul).
III. Event probabilities 27 Jul-29 Jul
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 26 Jul 069
Predicted 27 Jul-29 Jul 069/070/072
90 Day Mean 26 Jul 076
V. Geomagnetic A Indices
Observed Afr/Ap 25 Jul 009/ NA
Estimated Afr/Ap 26 Jul 010/012
Predicted Afr/Ap 27 Jul-29 Jul 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 27 Jul-29 Jul
A. Middle Latitudes
Minor Storm 05/05/01
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 20/20/20
Major-severe storm 25/15/10