Daily Report

Geomagnetic Summary

(last updated 21 Sep 2019 23:34 UT)

Geomagnetic field for Australian Region 21 Sep: Quiet Estimated Indices 21 Sep : A K Australian Region 4 11222201 Cocos Island 2 11111200 Townsville 5 11222211 Learmonth 5 22222201 Alice Springs 4 11222200 Gingin 5 21222201 Canberra 3 01222200 Launceston 6 12223201 Hobart 4 12222200 Estimated Antarctic Regional K Indices 21 Sep : Macquarie Island 8 02244100 Casey 8 23321212 Mawson 20 32332255 Observed Regional daily pc3 Indices 21 Sep : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (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 21 Sep : A Fredericksburg 7 Planetary 8 Observed AFr/Ap Indices 20 Sep : A K Fredericksburg 3 Planetary 4 2010 1121

Geomagnetic Forecast

(last updated 21 Sep 2019 23:34 UT)

Date Ap Conditions 22 Sep 5 Quiet 23 Sep 10 Quiet to unsettled, some active periods possible 24 Sep 12 Unsettled to Active COMMENT: Quiet levels of geomagnetic activity were recorded in the Australian region on UT day 21 September. Mostly quiet to unsettled conditions were observed in the Antarctic region with isolated active and minor storm periods. Global geomagnetic activity is expected to be mostly at quiet levels on UT day 22 September and then rise to unsettled and active levels on 23 and 24 September due to the effect of a coronal hole.