FORECAST SOL: Normal green MAG: Moderate yellow ION: Normal green
HomeGeophysicalSummary and ForecastsDaily Report Monday, Sep 25 2017 20:40 UT
Summary and Forecasts

Daily Report

Geomagnetic Summary

(last updated 24 Sep 2017 23:30 UT)

Geomagnetic field for Australian Region 24 Sep: Quiet Estimated Indices 24 Sep : A K Australian Region 4 11111122 Cocos Island 3 11011221 Darwin 4 11111222 Townsville 6 11121232 Alice Springs 3 01111122 Norfolk Island 4 11211122 Culgoora 3 01011122 Gingin 4 11101222 Camden 4 11111122 Canberra 3 01011122 Launceston 4 11111122 Hobart 3 01111122 Estimated Antarctic Regional K Indices 24 Sep : Macquarie Island 4 00022311 Casey 8 23321122 Mawson 10 33112224 Davis 7 22222222 Observed Regional daily pc3 Indices 24 Sep : Darwin 0 (Quiet) Townsville 6 (Quiet) Learmonth NA 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 24 Sep : A Fredericksburg 6 Planetary 8 Observed AFr/Ap Indices 23 Sep : A K Fredericksburg 4 Planetary 6 1211 1132

Geomagnetic Forecast

(last updated 24 Sep 2017 23:30 UT)

Date Ap Conditions 25 Sep 13 Unsettled to Active 26 Sep 9 Quiet to Unsettled 27 Sep 18 Active COMMENT: SWS Geomagnetic Warning 47 was issued on 22 September and is current for 23-25 Sep. Magnetic conditions were at quiet levels across the Australian region during the UT day, 24 September. Today, 25 September, the magnetic activity is expected to be mostly quiet to unsettled and at times could reach up to active levels. The forecasted disturbed magnetic conditions are in response to moderately elevated solar winds expected to emanate from the small recurrent equatorial coronal hole. Mostly quiet to unsettled conditions are expected for the subsequent day (26 September) as the current coronal hole effects wane. However, from late 27 September or thereabout the magnetic activity is expected to reach active levels associated with another large recurrent polar coronal hole soon reaching geoeffective location on the solar disk.

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