URSIGRAM SYDNEY 23/0000UT APRIL 2023 GEOALERT SYD113 UGEOA 85303 30423 0000/ 4021/ 11231 23231 31231 99999 PLAIN MAGNETIC FORECAST: MAJOR STORM 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