URSIGRAM SYDNEY 18/0000UT OCTOBER 2023 GEOALERT SYD291 UGEOA 85303 31018 0000/ 4021/ 11181 20181 30181 99999 PLAIN MAGNETIC FORECAST: QUIET BT Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au