Daily Report

Geomagnetic Summary

(last updated 17 Oct 2021 23:31 UT)

Geomagnetic field for Australian Region 17 Oct: Quiet to Unsettled Estimated Indices 17 Oct : A K Australian Region 7 12222232 Darwin 6 22221222 Townsville 7 22222222 Learmonth 8 12222233 Alice Springs 6 12222222 Gingin 7 02222232 Hobart 7 12222232 Estimated Antarctic Regional K Indices 17 Oct : Macquarie Island 12 11144332 Casey 15 44322233 Mawson 26 12223366 Observed Regional daily pc3 Indices 17 Oct : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 2 (Quiet) Alice Springs 2 (Quiet) Gingin 5 (Quiet) Canberra 2 (Quiet) Hobart 4 (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 17 Oct : A Fredericksburg 8 Planetary 10 Observed AFr/Ap Indices 16 Oct : A K Fredericksburg 3 Planetary 5 3111 1111

Geomagnetic Forecast

(last updated 17 Oct 2021 23:31 UT)

Date Ap Conditions 18 Oct 15 Unsettled to Active 19 Oct 15 Unsettled to Active 20 Oct 10 Quiet to Unsettled COMMENT: The geomagnetic conditions in the Australian region were quiet to unsettled on UT day 17 October. Unsettled levels were in response to a sustained Bz southward orientation. Storm levels were observed in the Antarctic region. Geomagnetic conditions are expected to increase to active levels with a slight chance of minor storm levels from late 18 October due to coronal hole effects.