Daily Report
Geomagnetic Summary
(last updated 18 May 2013 23:30 UT)
Geomagnetic field for Australian Region 18 May: Quiet to Active Estimated Indices 18 May : A K Australian Region 14 34333132 Cocos Island 10 33232131 Darwin 11 33233132 Townsville 14 34333232 Learmonth 14 34333132 Alice Springs 10 33223032 Culgoora 10 33233122 Gingin 16 34333242 Camden 13 34333122 Canberra 7 23232021 Hobart 12 24333122 Estimated Antarctic Regional K Indices 18 May : Macquarie Island 21 35453221 Casey 15 34333233 Mawson 54 76533265 Observed Regional daily pc3 Indices 18 May : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 2 (Quiet) Canberra 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 18 May : A Fredericksburg 18 Planetary 20 Observed AFr/Ap Indices 17 May : A K Fredericksburg 9 Planetary 10 2321 3232
Geomagnetic Forecast
(last updated 18 May 2013 23:30 UT)
Date Ap Conditions 19 May 35 Quiet to Minor Storm, with Major Storm periods overnight 20 May 20 Active 21 May 8 Quiet to Unsettled COMMENT: IPS Geomagnetic Warning 7 was issued on 18 May and is current for 19-20 May. Quiet to Active conditions were observed over the last 24 hours. The CME from 15-May arrived early in the UT day (18-May), producing Active periods with Minor Storm periods at high latitudes. Modelling of the CME from 17-May suggests an arrival time near midday (UT) on 19-May, and this event is likely to have a more significant impact on the geomagnetic field. Expect Quiet conditions during the first half of the UT day, increasing to Minor Storm with Major storm periods following the arrival of a CME around midday UT.
