https://territorystories.nt.gov.au/10070/674664/0/4
Territory Stories - Geophysical report 83/5, resistivity survey neutral junction/pine hill.
Made available via the Publications (Legal Deposit) Act 2004 (NT).
geophysical report
https://www.swpc.noaa.gov/products/report-and-forecast-solar-and-geophysical-activity
Report and Forecast of Solar and Geophysical Activity | NOAA / NWS Space Weather Prediction Center
https://spaceref.com/status-report/joint-usafnoaa-solar-geophysical-activity-report-and-forecast-31-january-2022/
Joint USAF/NOAA Solar Geophysical Activity Report and Forecast 31 January 2022 - SpaceRef
Jan 31, 2022 - Space news and reference site.
https://spaceref.com/status-report/joint-usafnoaa-report-of-solar-and-geophysical-activity-16-jul-2004/
Joint USAF/NOAA Report of Solar and Geophysical Activity 16 Jul 2004 - SpaceRef
Jul 16, 2004 - Space news and reference site.