Daily Report

Geomagnetic Summary

(last updated 25 Sep 2020 23:31 UT)

Geomagnetic field for Australian Region 25 Sep: Quiet to Active Estimated Indices 25 Sep : A K Australian Region 12 22332423 Cocos Island 6 11222312 Darwin 11 22332412 Townsville 12 22332423 Learmonth 14 21332523 Alice Springs 11 12332413 Gingin 11 21232423 Canberra 10 12232422 Hobart 12 12332423 Estimated Antarctic Regional K Indices 25 Sep : Macquarie Island 15 11343512 Casey 16 33432423 Mawson 59 65333667 Observed Regional daily pc3 Indices 25 Sep : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 6 (Quiet) Canberra 6 (Quiet) Melbourne NA 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 25 Sep : A Fredericksburg 15 Planetary 18 Observed AFr/Ap Indices 24 Sep : A K Fredericksburg 11 Planetary 18 3353 4402

Geomagnetic Forecast

(last updated 25 Sep 2020 23:31 UT)

Date Ap Conditions 26 Sep 15 Unsettled to Active 27 Sep 20 Active 28 Sep 20 Active COMMENT: Quiet to active conditions were observed in the Australian region and mostly quiet to major storm levels in the Antarctic region on UT day 25 September. Global conditions are expected to be mostly unsettled with isolated active periods on 26 September and unsettled to active on 27-28 September due to coronal hole effects. There is a chance of isolated minor storm periods for all three days.