URSIGRAM SYDNEY 04/0000UT DECEMBER 2023 GEOALERT SYD338 UGEOA 85303 31204 0000/ 4021/ 11041 21041 30041 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