Daily Report
Geomagnetic Summary
(last updated 18 Mar 2026 23:30 UT)
Geomagnetic field for Australian Region 18 Mar: G0 Estimated Indices 18 Mar : A K Australian Region 1 11110001 Cocos Island 0 -1100000 Darwin 1 22000000 Townsville 2 21110001 Learmonth 2 21111001 Alice Springs 1 20010000 Gingin 2 21100001 Canberra 1 01110001 Kennaook Cape Grim 1 11110001 Hobart 1 01110001 Estimated Antarctic Regional K Indices 18 Mar : Macquarie Island 1 01110000 Casey 8 23332012 Mawson 11 22222115 Observed Regional daily pc3 Indices 18 Mar : 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 18 Mar : A Fredericksburg 6 Planetary 7 Observed AFr/Ap Indices 17 Mar : A K Fredericksburg 4 Planetary 4 2112 1011
Geomagnetic Forecast
(last updated 18 Mar 2026 23:30 UT)
Date Ap Conditions 19 Mar 25 Initially G0, then G1-G2 20 Mar 30 G1-G2 21 Mar 25 G1-G2 COMMENT: ASWFC Geomagnetic Warning 16 was issued on 17 March and is current for 19-20 Mar. Geomagnetic conditions in the Australian region on UT day 18-Mar were G0. Conditions in the Antarctic region were G0. Two CME arrivals are expected over 19-20 Mar, with the first CME modelled to arrive 19/1800UT +/12 hrs and the second at 20/1700UT +/- 12hrs. G1-G2 geomagnetic conditions are expected from late in the UT 19-Mar and continuing into the first half of 21-Mar. In addition coronal hole wind streams are expected to contribute to geomagnetic activity over 21-23 Mar.
