Geophysical
FORECAST SOL: Normal green MAG: Normal green ION: Normal green
HomeGeophysicalSummary and ForecastsDaily Report Friday, Mar 24 2017 20:06 UT
Summary and Forecasts

Daily Report

Geomagnetic Summary

(last updated 23 Mar 2017 23:30 UT)

Geomagnetic field for Australian Region 23 Mar: Quiet to Unsettled Estimated Indices 23 Mar : A K Australian Region 7 32222211 Cocos Island 4 21121211 Darwin 7 32222212 Townsville 8 32232211 Learmonth 8 32232212 Alice Springs 7 32222211 Norfolk Island 6 32221111 Culgoora 7 32222211 Gingin 8 32232221 Canberra 4 22221100 Launceston 11 33332311 Hobart 7 22332210 Estimated Antarctic Regional K Indices 23 Mar : Macquarie Island 9 33341100 Casey 12 33432222 Mawson 23 56422222 Observed Regional daily pc3 Indices 23 Mar : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 2 (Quiet) Canberra 11 (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 23 Mar : A Fredericksburg 13 Planetary 16 Observed AFr/Ap Indices 22 Mar : A K Fredericksburg 19 Planetary 23 4424 4444

Geomagnetic Forecast

(last updated 23 Mar 2017 23:30 UT)

Date Ap Conditions 24 Mar 20 Quiet to active, isolated minor storm periods possible 25 Mar 12 Quiet to unsettled, isolated active periods possible 26 Mar 7 Quiet to Unsettled COMMENT: As anticipated, the effect of the high speed solar wind stream from the positive polarity recurrent coronal hole has been keeping the geomagnetic activity enhanced. Although isolated periods of minor storm were observed on high latitudes, geomagnetic activity did not rise to the expected levels as the north-south component of IMF, Bz did not stay south during most parts of the UT day (23 March). Solar wind speed still being high (between 600 km/s and 700 km/s), there is potential for geomagnetic activity levels to rise to minor storm levels on 24 March, if Bz turns sufficiently southwards and for sufficiently long intervals of time. Due to the continued effect of the coronal hole, geomagnetic activity may rise up to active levels with a slight possibility of isolated minor storm periods in Aus/NZ regions on 24 March. Geomagnetic activity in this region is then expected to gradually decrease to unsettled and then to quiet levels through the days 25 and 26 March.

go to top of page