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The WDMAM (World Digital Magnetic Anomaly Map) is an international scientific project under the auspices of IAGA (International Association of Geomagnetism and Aeronomy) and CGMW (Commission for the Geological Map of the World), aiming to compile and make available magnetic anomalies caused by the Earth lithosphere, on continental and oceanic areas, in a comprehensive way, all over the World.

The project started in 2003 and resulted in a first version of the map (Korhonen et al., 2007). A call for candidates initiated in 2010 led to the building of a new map which, after evaluation and correction, was released at the IUGG General Assembly of Prag in June 2015 as WDMAM version 2.0. This web site aims to distribute freely and as widely as possible a provisional version of the map (in jpeg format), the full grid (in ASCII format) or parts of the grid (in ASCII or GMT grd formats) to interested scientists and the general public. A printed version of the map will be released by CGMW in a very near future. A paper describing the building of the map will be published soon (Lesur et al., 2016, in press).

Please cite this map as: Dyment, J., Lesur, V., Hamoudi, M., Choi, Y., Thebault, E., Catalan, M., the WDMAM Task Force*, the WDMAM Evaluators**, and the WDMAM Data Providers**, World Digital Magnetic Anomaly Map version 2.0, map available at

* the WDMAM Task Force: J. Dyment (chair), M. Catalan (co-chair), A. de Santis, M. Hamoudi, T. Ishihara, J. Korhonen, V. Lesur, T. Litvinova, J. Luis, B. Meyer, P. Milligan, M. Nakanishi, S. Okuma, M. Pilkington, M. Purucker, D. Ravat, E. Th├ębault. (alphabetical order)

** the WDMAM Evaluators: C. Gaina, J. Luis, S. Maus, B. Meyer, M. Nakanishi, M. Purucker, Y. Quesnel, R. Saltus, P. Taylor. (alphabetical order)

The WDMAM Data Contributors: File here