Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 23 July 2018
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 204 Issued at 2200Z on 23 Jul 2018
IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: 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 (24 Jul, 25 Jul, 26 Jul).
IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 487 km/s at 22/2122Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 254 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (24 Jul, 25 Jul) and quiet to unsettled levels on day three (26 Jul).
III. Event probabilities 24 Jul-26 Jul
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 23 Jul 067
Predicted 24 Jul-26 Jul 068/068/068
90 Day Mean 23 Jul 071
V. Geomagnetic A Indices
Observed Afr/Ap 22 Jul 005/005
Estimated Afr/Ap 23 Jul 007/008
Predicted Afr/Ap 24 Jul-26 Jul 014/020-014/015-009/010
VI. Geomagnetic Activity Probabilities 24 Jul-26 Jul
A. Middle Latitudes
Active 40/30/20
Minor Storm 30/15/05
Major-severe storm 05/01/01
B. High Latitudes
Active 05/15/15
Minor Storm 20/30/25
Major-severe storm 65/45/30