Geomagnetic data and data products
Follow the links to the resources you need!
WDC observatory map
Observatory Data Portal

Observatory minute, hourly, daily, monthly and annual means. Plot data and download data in various formats.

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Screenshot of WDC catalogue page
Observatory Metadata

Observatory metadata. Instrument, location information and more.

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Annual mean data plot at Eskdalemuir
Observatory Annual Means

Includes jump information for observatory data discontinuities.

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Example model chart
Magnetic Field Models

World Magnetic Model (WMM), International Geomagnetic Reference Field (IRGF-13) and more...

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Screenshot of survey page
Magnetic Survey

Land survey and repeat station results from around the world.

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Example magnetogram
Historical Magnetograms

View analogue magnetograms from current and past UK magnetic observatories.

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ISES sunspot number plot
Solar and Geomagnetic Data and Indices

Indices: Kp, ap, Cp, and C9. Data: Bartels rotation, International Sunspot Number, F10.7 flux.

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F10.7 forecast plot
Geomagnetic and Solar Activity Forecasts

Forecasts of local activity (UK observatories), Ap index, and F10.7 flux.

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Example indices plot
Indices

Local K-index values for UK observatories. Global Ap and aa index values.

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Example chart showing monthly means from Eskdalemuir against the IGRF model
Observatory Monthly Means

A database of observatory monthly mean values.

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Screenshot of survey page
List of Magnetic Observatories

List of all magnetic observatories (maintained on behalf of IAGA Division V OBS).

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Photo of yearbooks
Historical Yearbooks

View digitised copies of historical yearbooks from UK and past British colonial observatories.

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Screenshot of WDC API documentation
API Documentation

Visit our API and explore the data and metadata available through our services.

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