Daily Report

Geomagnetic Summary

(last updated 28 Apr 2026 23:30 UT)

Geomagnetic field for Australian Region 28 Apr: G0 Estimated Indices 28 Apr : A K Australian Region 0 00100010 Cocos Island 1 11000010 Darwin 2 10100021 Townsville 1 11100011 Learmonth 1 10100010 Alice Springs 0 00100010 Gingin 0 00100010 Canberra 0 00100010 Kennaook Cape Grim 0 00100010 Hobart 0 00100010 Estimated Antarctic Regional K Indices 28 Apr : Macquarie Island 0 00000000 Casey 2 22200000 Mawson 1 11100000 Observed Regional daily pc3 Indices 28 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 4 (Quiet) Canberra 11 (Quiet) Hobart 11 (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 28 Apr : A Fredericksburg 4 Planetary 4 Observed AFr/Ap Indices 27 Apr : A K Fredericksburg 6 Planetary 7 3211 22-1

Geomagnetic Forecast

(last updated 28 Apr 2026 23:30 UT)

Date Ap Conditions 29 Apr 12 G0, chance of G1 30 Apr 14 G0, chance of G1 01 May 10 G0 COMMENT: G0 geomagnetic conditions were recorded in the Australian region throughout UT day 28-Apr, with G0 conditions also recorded in the Antarctic region, and at the planetary level. G0 geomagnetic conditions, with a chance of G1 are forecast over 29-30 Apr due to anticipated high speed wind stream effects from an equatorial coronal hole, declining to G0 on 01-May as these effects begin to subside.