Daily Report

Geomagnetic Summary

(last updated 24 Jul 2025 23:32 UT)

Geomagnetic field for Australian Region 24 Jul: G0 Estimated Indices 24 Jul : A K Australian Region 10 32333221 Cocos Island 8 22332221 Darwin 12 33333222 Townsville 11 32333222 Learmonth 15 -4334231 Alice Springs 10 32333221 Gingin 12 32334221 Canberra 10 32333221 Kennaook Cape Grim 11 32333222 Hobart 11 32333222 Estimated Antarctic Regional K Indices 24 Jul : Macquarie Island 22 32355431 Casey 14 43333322 Mawson 46 65643463 Observed Regional daily pc3 Indices 24 Jul : Darwin 2 (Quiet) Townsville 0 (Quiet) Learmonth 2 (Quiet) Alice Springs 0 (Quiet) Gingin 42 (Unsettled) Canberra 59 (Unsettled) Hobart 39 (Quiet to unsettled) 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 24 Jul : A Fredericksburg 16 Planetary 21 Observed AFr/Ap Indices 23 Jul : A K Fredericksburg 27 Planetary 0 4444 5344

Geomagnetic Forecast

(last updated 24 Jul 2025 23:32 UT)

Date Ap Conditions 25 Jul 15 G0, chance of G1 26 Jul 15 G0, chance of G1 27 Jul 10 G0 COMMENT: G0 geomagnetic conditions were observed in the Australian region on UT day 24-Jul. G2 conditions were observed at Mawson with G1 conditions observed at Macquarie Island. G0 conditions, with a chance of G1 are expected on 25-26 Jul due to a combination of coronal hole high speed wind stream effects and the chance of a glancing impact from a CME first observed on 23-Jul. G0 conditions are expected on 27-Jul.