Maintained by: British Geological Survey, Natural Environment Research Council.

Summary of Data Held: Machine readable data: Hourly values from worldwide observatories; annual means from geomagnetic observatories worldwide 1-minute mean values from 1979 onwards and 1-second values from 2000 onwards from UK observatories, 1-minute mean values from Ascension from 1993, Port Stanley from 1994.
INTERMAGNET GIN data,
Data from land, marine and aeromagnetic surveys and repeat stations worldwide 1900 onwards,
Ship-borne declination data c.1590 onwards,
Magnetic activity indices: K, aa, Kp, Ap
Archive magnetograms for several U.K. stations from c.1850.
Library containing yearbooks, expedition memoirs, original survey observations, etc. from c.1850.

User Services: The WDC-Geomagnetism, Edinburgh is open to visitors by prior arrangement.

Data Products, Publications, Catalogs: Data booklets containing magnetograms and hourly means of D, H, Z, K for U.K. observatories, and annual bulletins. Catalog of machine readable data. Included in the joint WDC catalog UAG92.