NOAA SEC Report of Solar-Geophysical Activity 23 Feb 2001
:Product: Report of Solar-Geophysical Activity
:Issued: 2001 Feb 23 2200 UT
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
#Space Environment Center and the U.S. Air Force.
#
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 054 Issued at 2200Z on 23 Feb 2001
IA. Analysis of Solar Active Regions and Activity from 22/2100Z
to 23/2100Z: Solar activity was low with only two weak C-class X-ray
flares. Region 9354 (S09W59) grew in size, but maintained a
relatively simple magnetic configuration. No new regions were
numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be low.
IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field was quiet to active. An isolated active period
occurred between 06Z and 09Z.
IIB. Geophysical Activity Forecast: Solar activity is expected to
be quiet to unsettled.
III. Event Probabilities 24 Feb-26 Feb
Class M 20/20/20
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 23 Feb 145
Predicted 24 Feb-26 Feb 145/145/140
90 Day Mean 23 Feb 166
V. Geomagnetic A Indices
Observed Afr/Ap 22 Feb 007/006
Estimated Afr/Ap 23 Feb 010/012
Predicted Afr/Ap 24 Feb-26 Feb 005/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 24 Feb-26 Feb
A. Middle Latitudes
Active 20/20/20
Minor storm 05/05/05
Major-severe storm 01/01/01
B. High Latitudes
Active 35/25/25
Minor storm 10/10/10
Major-severe storm 01/01/01