Status Report

NOAA SEC Product: Report of Solar-Geophysical Activity 2 Feb 2002

By SpaceRef Editor
February 2, 2002
Filed under , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2002 Feb 02 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 033 Issued at 2200Z on 02 Feb 2002
IA. Analysis of Solar Active Regions and Activity from 01/2100Z
to 02/2100Z: Solar activity was at low levels. Region 9800 (N10W44)
produced the largest flare of the period, a C5/Sf at 01/2120 UTC.
This region continues to show slow decay while retaining it’s
beta-gamma magnetic structure. Region 9802 (S14W18) produced two
minor C-class flares during the period and has also shown some
slight decay in penumbral coverage. However, the delta magnetic
configuration within the dominate intermediate spot remains intact.
Multiple Type III radio sweeps and a pair of radio bursts comprised
the rest of the recorded activity for the period. New Regions 9811
(S27E83) and 9812 (N12W16) were numbered today.
IB. Solar Activity Forecast: Solar activity is expected to be at
low to moderate levels. Region 9802 has the potential to produce
M-class flare activity, possibly an isolated major flare.
IIA. Geophysical Activity Summary 01/2100Z to 02/2100Z:
The geomagnetic field activity was at quiet to minor storm levels.
An isolated period of minor storm conditions occurred at 02/0600 –
0900 UTC. This was preceded with a sudden impulse at the Boulder
magnetometer of 45 nT at 02/0558 UTC. This transient is presumed to
be related to M3 x-ray flare that occurred in old Region 9787 at
31/1444 UTC. The optical correlation for this flare was attained
using SOHO/EIT imagery, as this region had rotated beyond the west
IIB. Geophysical Activity Forecast: The geomagnetic field activity
is expected to be at quiet to unsettled levels with a chance for
isolated active conditions through day one of the forecast period.
III. Event Probabilities 03 Feb-05 Feb
Class M 60/60/60
Class X 15/15/15
Proton 05/05/05
PCAF yellow
IV. Penticton 10.7 cm Flux
Observed 02 Feb 241
Predicted 03 Feb-05 Feb 240/240/240
90 Day Mean 02 Feb 225
V. Geomagnetic A Indices
Observed Afr/Ap 01 Feb 011/011
Estimated Afr/Ap 02 Feb 016/018
Predicted Afr/Ap 03 Feb-05 Feb 010/015-005/010-005/010
VI. Geomagnetic Activity Probabilities 03 Feb-05 Feb
A. Middle Latitudes
Active 20/15/15
Minor storm 05/05/05
Major-severe storm 01/01/01
B. High Latitudes
Active 25/20/20
Minor storm 10/05/05
Major-severe storm 05/01/01

SpaceRef staff editor.