NOAA SEC Report of Solar-Geophysical Activity 4 Jan 2002
:Product: Report of Solar-Geophysical Activity
:Issued: 2002 Jan 04 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 004 Issued at 2200Z on 04 Jan 2002
IA. Analysis of Solar Active Regions and Activity from 03/2100Z
to 04/2100Z: Activity was at moderate levels. New Region 9773
(N14E64) was numbered today. This region produced an M1/Sf flare at
04/1749 UTC. Region 9773 also produced a C3 flare at 04/0952 UTC
with an associated eruptive prominence and Type II radio sweep (537
km/s). SOHO/LASCO imagery does not indicate an Earth directed
component. Region 9767 (S22E08) produced a minor C6/Sf flare at
04/2304 UTC.
IB. Solar Activity Forecast: Solar activity is expected to be low
to moderate. Region 9767 has the potential for M class events. New
Region 9773 is rotating onto the northeast limb and is showing
signs of increased activity.
IIA. Geophysical Activity Summary 03/2100Z to 04/2100Z:
The Geomagnetic field was at quiet levels. The >10 MeV proton event
that began on 30/0245 UTC remains in progress, peak flux was 108
pfu at 31/1620 UTC. Stratwarm conditions remains in effect.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to active. Quiet levels are expected on the
first day of the period. A shock arrival from a C5/1f on 03/0220
UTC event is expected to arrive midday on day two of the period.
By day three activity is expected to return to unsettled levels.
The >10 MeV proton event is expected to end late today or early on
day one of the forecast period.
III. Event Probabilities 05 Jan-07 Jan
Class M 60/60/60
Class X 15/10/10
Proton 99/05/05
PCAF yellow
IV. Penticton 10.7 cm Flux
Observed 04 Jan 218
Predicted 05 Jan-07 Jan 215/210/210
90 Day Mean 04 Jan 220
V. Geomagnetic A Indices
Observed Afr/Ap 03 Jan 006/003
Estimated Afr/Ap 04 Jan 004/005
Predicted Afr/Ap 05 Jan-07 Jan 005/008-008/012-005/008
VI. Geomagnetic Activity Probabilities 05 Jan-07 Jan
A. Middle Latitudes
Active 15/30/15
Minor storm 05/10/05
Major-severe storm 01/05/01
B. High Latitudes
Active 20/35/20
Minor storm 10/15/10
Major-severe storm 01/05/01