Download Data

Science Center Objects

USGS Geomagnetism Program data are made available as-is and without any guarantees of continuity and quality.

View Data

To view geomagnetic data use Geomag Plots.

Retrieve Data

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 a download for USGS preliminary and definitive data directly from USGS.

Definitive Dst

1-hour USGS Dst / 1-minute USGS Dst

Data Acknowledgement
Publications making use of our data should include an acknowledgment statement such as the following:
The results presented in this document rely on data collected at magnetic observatories operated by the U.S. Geological Survey (USGS,

USGS Geomagnetism Program Data, Inquiries and Specialized Data Requests:
Abram Claycomb
Data Management: Software Developer


Other Sources of Data

Magnetometer Arrays by Region

Alternate Sources of Geomagnetic Data:

Satellite Programs:


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Carol A. Finn
Geomagnetism Group Leader