Daily Report
Geomagnetic Summary
(last updated 12 Jun 2025 23:30 UT)
Geomagnetic field for Australian Region 12 Jun: G1 Estimated Indices 12 Jun : A K Australian Region 20 23354243 Cocos Island 9 23232132 Darwin 20 23344344 Townsville 17 23344243 Learmonth 23 33355243 Alice Springs 21 23354244 Gingin 23 33345344 Canberra 19 22354243 Kennaook Cape Grim 30 32465344 Hobart 29 33464344 Estimated Antarctic Regional K Indices 12 Jun : Macquarie Island 45 34576343 Casey 14 33233143 Mawson 55 66653356 Observed Regional daily pc3 Indices 12 Jun : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 2 (Quiet) Canberra 5 (Quiet) Hobart 25 (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 12 Jun : A Fredericksburg 19 Planetary 24 Observed AFr/Ap Indices 11 Jun : A K Fredericksburg 13 Planetary 18 3322 2445
Geomagnetic Forecast
(last updated 12 Jun 2025 23:30 UT)
Date Ap Conditions 13 Jun 8 G0, chance G1-G2 14 Jun 14 G0-G1 15 Jun 18 G0-G1 COMMENT: ASWFC Geomagnetic Warning 43 was issued on 11 June and is current for 13-15 Jun. G1 geomagnetic conditions were observed in the Australian region on UT day 12-Jun. G0-G3 geomagnetic conditions were observed in the Antarctic region. The cause of the geomagnetic disturbance was the onset of a coronal hole, and possibly a weak transient CME influence, along with several periods of southward solar wind parameter Bz. Conditions are expected to be similar, with a chance of G2, on 13 Jun, then further periods of G1 are possible on either late 14-Jun or else 15-Jun due to connection to a new coronal hole.
