Last updated 29 Jul 2010 23:37 UT Geomagnetic field for Australian Region 29 Jul: Quiet to Unsettled Estimated Indices 29 Jul : A K Australian Region 8 23232211 Darwin 6 22222112 Townsville 9 23232222 Learmonth 7 22223211 Canberra 6 22232101 Hobart 5 22232100 Casey(Ant) 15 34423322 Observed Regional daily pc3 Indices 29 Jul : Darwin 24 (Quiet to unsettled) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice_Springs 7 (Quiet) Gnangara 55 (Unsettled) Canberra 35 (Quiet to unsettled) Hobart 30 (Quiet to unsettled) 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 Space Environment Research Center, Japan. Estimated AFr/Ap Indices 29 Jul : A Fredericksburg 8 Planetary 10 Observed AFr/Ap Indices 28 Jul : A K Fredericksburg 10 Planetary 14 4333 3233

Geomagnetic Forecast

Last updated 29 Jul 2010 23:37 UT Date Ap Conditions 30 Jul 8 Quiet to Unsettled 31 Jul 6 Quiet 01 Aug 6 Quiet COMMENT: Geomagnetic activity was Quiet to Unsettled over the last 24 hours. Solar wind speed (Vsw) remains elevated at ~600km/s due to the recurrent coronal hole high speed solar wind stream (HSSWS) and is expected to remain so for the next 24-48 hours. Expect Quiet to Unsettled conditions for 30Jul and mostly Quiet conditions expected for 31Jul-01Aug.