The secular variation of geomagnetic field is a regional phenomenon. Hence, secular variation master curves, which can be used for archaeomagnetic dating of burnt structures, have been developed for different countries. The increasing amount of new data in several regions of and around Europe requires a new data management. All existing and new data will be stored in an European database.

GEOMAGIA50
The GEOMAGIA50 is a database that comes with a web interface intended to give users easy access to archaeo- and palaeomagnetic intensity data. The database contains 3 700 determinations of geomagnetic field intensity for the past 50 000 years. The output is available as graphic (*.gif, *.eps) or text (ascii). A manual in pdf-form is provided, too.

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Burnt structures or materials from burnt structures (sherds), which have been well-dated by non-archaeomagnetic methods, are of unpayable value for the improvement of the archaeomagnetic database. In case you know such structures or materials and which meet the sampling criteria, you are very welcome to fill the online form (sections 1, 3 and 4). We would eventually contact you for further collaboration.

On the internet you will find the global archaeomagnetic database which was compiled by Don Tarling in 1999, based on directions (declination and inclination).

http://www.ngdc.noaa.gov/seg/geomag/paleo.shtml