The Thematic Core Service Geomagnetic Observations offers a broad portfolio of services. Geomagnetism work under EPOS has also seen the creation of a community resource for Geomagnetic Observatory metadata, a system that supports various data services.

World Data Center for Geomagnetism (Edinburgh)

The World Data Center (WDC)  has a comprehensive set of digital geomagnetic data as well as indices of geomagnetic activity supplied from a worldwide network of magnetic observatories. The WDC for geomagnetism actively engages with the geomagnetic community to grow its data collections.
The TCS Geomagnetic Observations works closely with the WDC to improve the metadata associated with observatory data, including geomagnetic observatory data and magnetic surveys.

International Monitor for Auroral Geomagnetic Effects (IMAGE)

IMAGE is a network of 41 magnetometer stations maintained by eight European institutes. These stations capture the profile of auroral electrojets, electric currents with an oval pattern that forms around the Earth’s poles and are controlled by the Earth’s magnetic field and its interaction with the solar wind. Besides, IMAGE also provides high-quality data useful for studies of geomagnetic induction and long-term geomagnetic activity in the auroral region.

Together with other ground-based recordings (by radars, riometers, all-sky cameras) and satellite observations, IMAGE is an essential part of the investigations of high-latitude magnetospheric-ionospheric physics. 
The TCS Geomagnetic Observations consolidates geomagnetic variation data and the disturbance levels recorded by auroral zone magnetometers from the IMAGE network and integrates it within the EPOS’ data portal. 


INTERMAGNET is a global organisation of geomagnetic observatories. This worldwide network provides permanent and consistent data from geomagnetic observatories. INTERMAGNET ensures that the recorded observations meet the quality requirements and data has the geographical coverage required to meet the evolving needs of research and applied science.

International Service of Geomagnetic Indices (ISGI)

The International Service of Geomagnetic Indices (ISGI) creates and disseminates geomagnetic indices, and organises tables of remarkable magnetic events, based on the report of magnetic observatories distributed all over the planet. 

ISGI is a service of the International Association of Geomagnetism and Aeronomy (IAGA). The collaboration of ISGI Institutes ensures the quality and homogeneity of the data series.


Service Description Leading institution

Geomagnetic observatory data

Geomagnetic observatory data from the World Data Center for Geomagnetism (Edinburgh) and from the INTERMAGNET network.


Variometer data

Geomagnetic variation data from the IMAGE variometer network, including its Baltic extensions.


Magnetic survey data

Geomagnetic survey (‘spot value’) data from ‘repeat station’ networks. Data will be harvested from the World Data Centre for Geomagnetism (Edinburgh).


Magnetotelluric time-series (TS)

Time series data from the Magnetotelluric community.


Historical data

Data from variometer networks that are no longer operational.


Geomagnetic indices

Current and historical geomagnetic indices from the International Service for Geomagnetic Indices.


Geomagnetic events

List of notable events in the record of Geomagnetc Data from the International Service for Geomagnetic Indices.


IMAGE electrojet indices (IE/IL/IU)

The disturbance level recorded by auroral zone magnetometers in the IMAGE variometer network.


Substorm events

A list of magnetic substorm events (also known as auroral substorms).


Magnetotelluric  transfer functions (TF)

A database of magnetotelluric transfer functions.


IGRF and WMM global magnetic models

Access to the International Geomagnetic Reference Frame and the World Magnetic Model.


Lithospheric conductivity models

Access to models of sub-surface conductivity generated from magnetotellruic data.


World Digital Magnetic Anomaly Map (WDMAM)

Access to the global integrated model of magnetic anomalies.