Daily Report

Geomagnetic Summary

(last updated 18 Aug 2017 23:50 UT)

Geomagnetic field for Australian Region 18 Aug: Quiet to Unsettled Estimated Indices 18 Aug : A K Australian Region 12 33223332 Cocos Island 10 22223332 Darwin 12 33223332 Townsville 13 33323332 Learmonth 13 33223342 Alice Springs 12 32223342 Norfolk Island 11 33223232 Culgoora 12 33233232 Gingin 12 32223342 Camden 13 33233332 Canberra 9 22233231 Launceston 18 33334343 Hobart 16 33234342 Estimated Antarctic Regional K Indices 18 Aug : Macquarie Island 31 33356452 Casey 33 44333373 Mawson 34 45444455 Davis 39 43433475 Observed Regional daily pc3 Indices 18 Aug : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 56 (Unsettled) Canberra 45 (Unsettled) 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 18 Aug : A Fredericksburg 16 Planetary 22 Observed AFr/Ap Indices 17 Aug : A K Fredericksburg 20 Planetary 28 3255 5443

Geomagnetic Forecast

(last updated 18 Aug 2017 23:50 UT)

Date Ap Conditions 19 Aug 16 Active 20 Aug 13 Unsettled to Active 21 Aug 11 Unsettled COMMENT: Quiet to Unsettled geomagnetic activity with isolated Active periods observed across the Australian region over the past 24 hours. Geomagnetic activity is expected to be Unsettled to Active for 19Aug-20Aug due to continued coronal hole effects. A decline in geomagnetic activity is expected on 21Aug to Unsettled to Quiet conditions due to diminishing influence of the coronal hole.