Daily Report

Geomagnetic Summary

(last updated 06 Oct 2025 23:30 UT)

Geomagnetic field for Australian Region 06 Oct: G0 Estimated Indices 06 Oct : A K Australian Region 3 11112111 Cocos Island 2 11101111 Darwin 3 11101112 Townsville 4 21012112 Learmonth 4 12102212 Alice Springs 2 11002111 Gingin 4 11112212 Canberra 2 10012111 Kennaook Cape Grim 4 11112211 Hobart 4 11112211 Estimated Antarctic Regional K Indices 06 Oct : Macquarie Island 3 11022201 Casey 17 45422222 Mawson 20 32212346 Observed Regional daily pc3 Indices 06 Oct : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Hobart 0 (Quiet) Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 06 Oct : A Fredericksburg 5 Planetary 5 Observed AFr/Ap Indices 05 Oct : A K Fredericksburg 6 Planetary 9 3332 211-

Geomagnetic Forecast

(last updated 06 Oct 2025 23:30 UT)

Date Ap Conditions 07 Oct 11 G0, chance of G1 08 Oct 7 G0 09 Oct 5 G0 COMMENT: ASWFC Geomagnetic Warning 77 was issued on 4 October and is current for 6-7 Oct. G0 geomagnetic conditions were observed in the Australian region on UT day 6-Oct. G0-G1 geomagnetic conditions were observed in the Antarctic region. Mostly G0 geomagnetic conditions are expected on 7-Oct with a slight possibility of G1 periods due to a weak anticipated CME impact, but this is low confidence. G0 geomagnetic conditions are expected over 8-9 Oct. 4