URSIGRAM SYDNEY 11/0000UT DECEMBER 2023 GEOALERT SYD345 UGEOA 85303 31211 0000/ 4021/ 11111 21111 30111 99999 PLAIN MAGNETIC FORECAST: ACTIVE due to CORONAL HOLE BT Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au