- Press Release
- Oct 2, 2022
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 12 July 2021
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 193 Issued at 2200Z on 12 Jul 2021
IA. Analysis of Solar Active Regions and Activity from 11/2100Z to 12/2100Z: Solar activity has been at very low levels for the past 24 hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast: Solar activity is expected to be very low on days one, two, and three (13 Jul, 14 Jul, 15 Jul).
IIA. Geophysical Activity Summary 11/2100Z to 12/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 345 km/s at 12/1356Z. Total IMF reached 9 nT at 12/1259Z. The maximum southward component of Bz reached -6 nT at 12/1421Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 165 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (13 Jul, 14 Jul) and quiet to unsettled levels on day three (15 Jul).
III. Event probabilities 13 Jul-15 Jul
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 12 Jul 072
Predicted 13 Jul-15 Jul 072/072/072
90 Day Mean 12 Jul 078
V. Geomagnetic A Indices
Observed Afr/Ap 11 Jul 004/004
Estimated Afr/Ap 12 Jul 007/008
Predicted Afr/Ap 13 Jul-15 Jul 014/016-011/012-007/008
VI. Geomagnetic Activity Probabilities 13 Jul-15 Jul
A. Middle Latitudes
Minor Storm 15/10/05
Major-severe storm 01/01/01
B. High Latitudes
Minor Storm 30/30/25
Major-severe storm 50/40/30