Image showing gravity sation coverage and relative reliability over Australia, updated to May 2011

The Australia Epoch 1995.0 geomagnetic field chart maps the main geomagnetic field and its secular variation in the Australian region between 1995 and 2000 . The chart is derived from the Australian Geomagnetic Reference Field model (AGRF) of the same epoch. From 1990 to 2005 the AGRF has been updated at five yearly epochs. A main field model is produced for each five yearly epoch, along with a prospective secular variation model to extend the life of the model. The AGRF model represents the Earth's main magnetic field originating from the core and the broad scale crustal field. The AGRF does not model short term variations of the magnetic field with time, such as those caused by solar activity or ionspheric currents. The AGRF is derived from vector magnetic data from ground level, aircraft and satellite surveys as well as the network of geomagnetic observatories and repeat stations run by Geoscience Australia and neighbouring countries. (This chart is now superseded.)

Australia 85 east magnetic intensity (Y) isomagnetic chart 1985.0 epoch 1:10M

Image showing gravity station coverage over Australia, updated to October, 2007

Australia 85 north magnetic intensity (X) isomagnetic chart 1985.0 epoch 1:10M

Australia 85 vertical magnetic intensity (Z) isomagnetic chart 1985.0 epoch 1:10M

Australia 85 inclination magnetic (dip I) isomagnetic chart 1985.0 epoch 1:10M

No abstract available

No abstract available

Index map showing station spacing and relative reliability of gravity land data in Australia