The magweb download server will be decommissioned November 30, 2015. Geomagnetic data is still available online via alternative methods. Please subscribe to our geomag-data mailing list and other mailing lists below to receive email notifications for changes like this in the future.

To view geomagnetic data, use the Geomag Plots application

For programmatic access to geomagnetic data, use the geomag-algorithms python library

Thank you for your interest in our program.

Data Access

View Data

To view geomagnetic data, use the Geomag Plots application

Retrieve Data

For programmatic access to geomagnetic data, use the geomag-algorithms python library

Mailing Lists

geomag-data
Questions and discussion related to USGS Geomagnetism program data products and data access. Announcements about new data products, data product updates, and issues with data products.
geomag-operations
Frequent announcements about USGS Geomagnetic observatory related maintenance and disturbances, including planned outages.
geomag-research
Questions and discussion related to geomagnetic, geoelectric, and space hazards research. Announcements about new research papers, presentations and public outreach from the USGS Geomagnetism Program.

Interactive Download

Definitive data, consisting of one-minute, hourly-mean, and daily-mean values from USGS observatories from the year 1985 onward are available online. Intermagnet has definitive data available for download, including USGS data. The most recent definitive data typically becomes available within a year of the end of the previous calendar year. USGS currently has an interactive data downloader in beta testing, which will provide download for USGS preliminary and definitive data directly from USGS.

Definitive Dst
1-hour USGS Dst
1-minute USGS Dst

USGS Geomagnetism Program Data, Inquiries and Specialized Data Requests

Duff C Stewart
Data Management: Software Developer
dcstewart@usgs.gov