URSIGRAM SYDNEY 18/0000UT MAY 2025 GEOALERT SYD138 UGEOA 85303 50518 0000/ 4021/ 11181 21183 30181 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