[Ips-geo-warning] ASWFC GEOMAGNETIC WARNING issued 0011 UT on 18 Mar 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC GEOMAGNETIC DISTURBANCE WARNING 23/12
ISSUED AT 0006UT/18 MARCH 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

A large 48 degree long filament located in the solar south west 
quadrant, centred at S30W25 erupted from 17/0700-1000UT and a 
subsequent south west directed CME was observed in LASCO C2 imagery 
from 17/1058UT. Event modelling indicates a CME arrival middle 
of the UT day on 19-Mar. Due to a lack of available images CME 
analysis was restricted to C2 imagery only. The southern solar 
latitude of this filament may reduce induced activity at the 
Earth, with model output showing the bulk of the CME passing 
under the Earth.

INCREASED GEOMAGNETIC ACTIVITY EXPECTED 
DUE TO CORONAL MASS EJECTION
FROM 19-20 MARCH 2023
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GEOMAGNETIC ACTIVITY FORECAST
19 Mar:  Initially G0, then increasing to G1 with the chance of 
         isolated G2 periods, during the second half of the UT day.
20 Mar:  G1 periods possible early in the UT day, then declining to G0

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au