From aswfc at bom.gov.au Fri Oct 2 12:42:04 2026 From: aswfc at bom.gov.au (Australian Space Weather Forecasting Centre) Date: Fri, 02 Oct 2026 12:42:04 +1000 Subject: [Ips-wsgr] ASWFC Weekly Solar and Geophysical Report (02 October 26) issued 0242 UT on 02 Oct 2026 [SEC=OFFICIAL] Message-ID: <6abf19fc.cP/Pm9I8Ec66BATU%aswfc@bom.gov.au> SUBJ: ASWFC WEEKLY SOLAR AND GEOPHYSICAL REPORT ISSUED ON 02 OCTOBER 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (25 SEPTEMBER - 01 OCTOBER) Date 25 26 27 28 29 30 01 10cm 105 101 97 95 92 93 92 AFr 16 11 8 3 3 3 ( 3) Aaus 12 8 3 1 1 1 ( 2) T 64 53 55 49 60 62 53 Solar: Solar flare activity Geomagnetic: Geomagnetic activity observed for Australian region. Frequencies: Australian ionospheric F2 critical frequencies 25 Sep Solar: R0 Geomagnetic: GO Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 30% during local day. Enhanced by 30% during local night. Enhanced by 25% after local dawn. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Depressed by 15% over the UT day. 26 Sep Solar: R0 Geomagnetic: G0 Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 15% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Depressed by 15% during local night. Antarctic Region (Casey/Davis/Mawson): Depressed by 15% over the UT day. 27 Sep Solar: R0 Geomagnetic: G0 Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 45% during local day. Enhanced by 45% during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. 28 Sep Solar: R0 Geomagnetic: G0 Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Near predicted monthly values during local day. Depressed by 20% during local night. Northern Australian Region: Depressed by 15% during local day. Near predicted monthly values during local night. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. 29 Sep Solar: R0 Geomagnetic: G0 Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 20% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Near predicted monthly values over the UT day. 30 Sep Solar: R0 Geomagnetic: G0 Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Enhanced by 20% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Enhanced by 20% over the UT day. 01 Oct Solar: R0 Geomagnetic: G0 Frequencies: Cocos Island Region: No data available during local day. No data available during local night. Niue Island Region: Near predicted monthly values during local day. Depressed by 25% during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Davis/Mawson): Enhanced by 15% over the UT day. 2. FORECAST (02 OCTOBER - 08 OCTOBER) Solar: Solar flare activity is expected to be at the R0 level over the week. Geomagnetic: G1, chance G2 geomagnetic activity is expected on the 02-Oct. This will give way to G0, chance G1 conditions on the 03-Oct, before increasing to G1 on the 04-Oct. Geomagnetic conditions on the 05-Oct are expected to be G0, chance G1. The remainder of the week is expected to be at G0 levels. Activity is due to a CME first observed on the 28-Sep, followed by another on the 30-Sep. The latter CME will likely coincide with a coronal hole high speed wind stream. Both CMEs are expected to only glance the Earth. Frequencies: Maximum Usable Frequencies (MUFs) in the Australian region are expected to be near predicted monthly values on the 02-Oct. Depressions of up to 15% are anticipated over the 03-05 Oct. Conditions will should then return to predicted monthly values for the remainder of the week. For an explanation of some of the terms in this report, go to https://www.sws.bom.gov.au, and follow links to Educational-> Glossary on Solar Terrestrial Terms. Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au