- Status Report
- August 12, 2022
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 7 April 2018
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 97 Issued at 2200Z on 07 Apr 2018
IA. Analysis of Solar Active Regions and Activity from 06/2100Z to 07/2100Z: 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 (08 Apr, 09 Apr, 10 Apr).
IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z: The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed reached a peak of 383 km/s at 07/1948Z. Total IMF reached 5 nT at 07/1809Z. The maximum southward component of Bz reached -3 nT at 07/2029Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 314 pfu.
IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels on days one and two (08 Apr, 09 Apr) and quiet to minor storm levels on day three (10 Apr).
III. Event probabilities 08 Apr-10 Apr
Class M 01/01/01
Class X 01/01/01
IV. Penticton 10.7 cm Flux
Observed 07 Apr 067
Predicted 08 Apr-10 Apr 067/067/067
90 Day Mean 07 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 06 Apr 003/003
Estimated Afr/Ap 07 Apr 005/005
Predicted Afr/Ap 08 Apr-10 Apr 006/005-006/005-012/015
VI. Geomagnetic Activity Probabilities 08 Apr-10 Apr
A. Middle Latitudes
Minor Storm 01/01/25
Major-severe storm 01/01/05
B. High Latitudes
Minor Storm 15/15/30
Major-severe storm 15/15/55