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Secular variation from monthly means from Apia and Amberley magnetic observatories |
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| Authors: | D Gubbins L Tomlinson |
| Institution: | Bullard Laboratories, Department of Earth Sciences, Madingley Road, Cambridge CB3 0EZ;DSIR Physics and Engineering Laboratory, Geophysical Observatory, PO Box 2111, Christchurch, New Zealand |
| Abstract: | |
| Keywords: | geomagnetism secular variation geomagnetic jerk |