INTERMAGNET provides data and information from geomagnetic observatories, with tools for downloads, plots, and data quality checks.
International Service of Geomagnetic Indices
ISGI provides geomagnetic indices endorsed by IAGA, with tools to view and download data.
About International Service of Geomagnetic Indices
ISGI, the International Service of Geomagnetic Indices, is a reference service hosted by EOST in Strasbourg, France. It provides geomagnetic indices endorsed by IAGA to the scientific community. The website includes data download and data plot sections, quick-look aa and am values, and documents such as monthly bulletins and a list of geomagnetic observatories. It also lists web service documentation for data access.
Pricing is not clearly stated.
Key features
- IAGA-endorsed geomagnetic indices and events
- Data download and data plot sections
- Quick-look aa and am values
- Monthly ISGI and IAGA bulletins
- List of geomagnetic observatories
- Web service documentation
Good for
- Describes itself as a reference service and trusted data repository
Watch out for
- Quick-look plots are automatic and might be based on wrong data, such as magnetically polluted data or spikes
International Service of Geomagnetic Indices at a glance
- Website
- isgi.unistra.fr
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Details verified
- Oct 21, 2026 · Official source
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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International Service of Geomagnetic Indices FAQ
How do I get web service access to ISGI data?
The site lists web service documentation and an application step for ISGI data web service access.
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