IA. Analysis of Solar Active Regions and Activity from 25/2100Z
to 26/2100Z: Solar activity was very low. No flares were observed
during the past 24 hours and the disk remained spotless.
IB. Solar Activity Forecast: Solar activity is expected to remain
very low for the next three days (27-29 April).
IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z:
The geomagnetic field was quiet during the past 24 hours.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to unsettled with isolated active periods at
high latitudes on day 1 (27 April) due to possible effects of a CME
observed on 22 April and a coronal hole high speed stream rotating
into a geoeffective position. Quiet to unsettled conditions are
expected on day two (28 April) due to a second coronal hole high
speed stream rotating into a geoeffective position. Conditions are
expected to be quiet on day three (29 April).
III. Event Probabilities 27 Apr-29 Apr
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 26 Apr 076
Predicted 27 Apr-29 Apr 076/076/078
90 Day Mean 26 Apr 081
V. Geomagnetic A Indices
Observed Afr/Ap 25 Apr 002/003
Estimated Afr/Ap 26 Apr 004/004
Predicted Afr/Ap 27 Apr-29 Apr 008/010-007/008-005/005
VI. Geomagnetic Activity Probabilities 27 Apr-29 Apr
A. Middle Latitudes
Active 15/10/05
Minor storm 05/05/01
Major-severe storm 01/01/01
B. High Latitudes
Active 20/15/05
Minor storm 10/05/01
Major-severe storm 01/01/01
 

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