IA. Analysis of Solar Active Regions and Activity from 22/2100Z
to 23/2100Z: Solar activity was very low. The visible disk remains
spotless.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field was mostly quiet. Solar wind speed slowly
declined through the period, with values around 475 km/s at forecast
issue time. The greater than 2 MeV electron flux at geosynchronous
orbit reached high levels again today.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to unsettled on 24-25 December, with isolated
active periods possible at high latitudes. Quiet conditions are
expected to return on 26 December.
III. Event Probabilities 24 Dec-26 Dec
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 23 Dec 071
Predicted 24 Dec-26 Dec 072/072/072
90 Day Mean 23 Dec 072
V. Geomagnetic A Indices
Observed Afr/Ap 22 Dec 007/007
Estimated Afr/Ap 23 Dec 007/008
Predicted Afr/Ap 24 Dec-26 Dec 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 24 Dec-26 Dec
A. Middle Latitudes
Active 15/15/10
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 20/15/15
Minor storm 05/05/05
Major-severe storm 01/01/01
 

NOAA Space Weather Scale descriptions can be found at www.sec.noaa.gov/NOAAscales