Status Report

NOAA SEC Report of Solar-Geophysical Activity 1 Mar 2002

By SpaceRef Editor
March 1, 2002
Filed under , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2002 Mar 01 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 060 Issued at 2200Z on 01 Mar 2002
IA. Analysis of Solar Active Regions and Activity from 28/2100Z
to 01/2100Z: Solar activity has been low. Several C-class events
occurred, the largest being a C9.7 flare at 01/0012 UTC. No
corresponding optical flare report was received for this event, but
SOHO/EIT imagery suggests that Region 9845 (N17W04) was the source.
Two type-II radio sweep events occurred during the period. The
first was at 01/0214 UTC, with an estimated velocity of 1200 km/s.
SOHO/LASCO imagery revealed a fast CME from a source behind the
southwest limb at this time, though not appearing earth-directed.
The second sweep had an estimated velocity of 742 km/s and occurred
at 01/0542 UTC, shortly after an impulsive C7/Sf from Region 9848
(S20W21) at 01/0531 UTC. However, no CME activity was evident in
LASCO imagery following this event. Two new regions were numbered
today: 9851 (S07E56), and 9852 (N16E66).
IB. Solar Activity Forecast: Solar activity is expected to be low
to moderate for the next three days. Region 9845 is a possible
source for isolated M-class flares.
IIA. Geophysical Activity Summary 28/2100Z to 01/2100Z:
Geomagnetic field activity was at quiet to minor storm levels. A
sustained period of southward IMF, following a weak interplanetary
shock passage early on 28 February, caused active and isolated minor
storm conditions at higher latitudes during 28/2100 – 01/0300 UTC.
Activity has been predominantly quiet since then.
IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be mainly quiet to unsettled, until the onset of high
speed stream effects from a recurrent coronal hole begin to develop
by day three of the forecast period. Isolated active conditions are
anticipated thereafter.
III. Event Probabilities 02 Mar-04 Mar
Class M 40/40/40
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 01 Mar 188
Predicted 02 Mar-04 Mar 190/190/190
90 Day Mean 01 Mar 223
V. Geomagnetic A Indices
Observed Afr/Ap 28 Feb 015/017
Estimated Afr/Ap 01 Mar 010/010
Predicted Afr/Ap 02 Mar-04 Mar 005/006-005/008-010/010
VI. Geomagnetic Activity Probabilities 02 Mar-04 Mar
A. Middle Latitudes
Active 15/15/25
Minor storm 05/05/10
Major-severe storm 01/01/01
B. High Latitudes
Active 20/20/30
Minor storm 05/05/10
Major-severe storm 01/01/01

SpaceRef staff editor.