Status Report

NOAA SEC Report of Solar-Geophysical Activity- 6 Feb 2002

By SpaceRef Editor
February 6, 2002
Filed under , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2002 Feb 06 2210 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 037 Issued at 2200Z on 06 Feb 2002
IA. Analysis of Solar Active Regions and Activity from 05/2100Z
to 06/2100Z: Solar activity was at moderate levels. Region 9802
(S13W68) produced an M1.4 flare at 06/1132 UTC. Region 9816
(S11W58) produced a C8/Sf at 06/0445 UTC with an associated Type II
Radio Sweep (457 km/s). Region 9802 has shown rapid decay in the
last 24 hours and now has a beta-gamma magnetic configuration with
310 millionths area, 17 spots and an extent of 13 degrees. Region
9816 also has entered a decay phase.
IB. Solar Activity Forecast: Solar activity is expected to be low
to moderate. Region 9802, while in a decay phase, still has the
potential for an M-class event.
IIA. Geophysical Activity Summary 05/2100Z to 06/2100Z:
The geomagnetic field was at unsettled to active levels with one 3
hour period of quiet conditions. A large coronal hole is centered
at S10W40 and is producing the unsettled to active conditions. This
coronal hole has an average solar wind speed of 625 km/s over the
last 24 hours. Average Bz for the last 24 hours was a negative 0 –
5 nT.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at quiet to active levels for the first day of the
forecast period. Day two and three are expected to return to quiet
to unsettled levels as the coronal hole rotates beyond a
geo-effective position.
III. Event Probabilities 07 Feb-09 Feb
Class M 55/50/40
Class X 10/05/05
Proton 05/05/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 06 Feb 203
Predicted 07 Feb-09 Feb 205/200/195
90 Day Mean 06 Feb 225
V. Geomagnetic A Indices
Observed Afr/Ap 05 Feb 015/016
Estimated Afr/Ap 06 Feb 015/016
Predicted Afr/Ap 07 Feb-09 Feb 012/015-010/012-008/010
VI. Geomagnetic Activity Probabilities 07 Feb-09 Feb
A. Middle Latitudes
Active 30/20/15
Minor storm 15/10/05
Major-severe storm 01/01/01
B. High Latitudes
Active 35/25/20
Minor storm 20/15/10
Major-severe storm 01/01/01

SpaceRef staff editor.