Global Geomagnetic Observatory Hourly and Minute Means Since 1883

Hourly and minute means of the geomagnetic field vector components from approximately 160 observatories worldwide. Data spans from 1883 for hourly means and 1969 for minute means to the present day, produced by organizations including the British Geological Survey. These measurements track changes in Earth's internal and external magnetic field.

Use Cases

• Analyze long-term secular variation in geomagnetic field vector components from 1883 to present
• Model external magnetic disturbances using minute means data from global observatories since 1969
• Correlate geomagnetic field vector components across the network of approximately 160 observatories

Strengths

• Long temporal coverage, with hourly means starting in 1883 and minute means from 1969
• Global spatial coverage from approximately 160 observatories
• Data is current and updated to the present day

Limitations

• Column names and specific data structure are unknown, complicating programmatic analysis
• Data is provided in HTML format, which is non-standard for scientific time series data and requires parsing
• Sample data is unavailable for previewing the exact format and content

Provenance

Source

British Geological Survey (BGS) and other global organizations

Collection Method

Measurements from geomagnetic observatories.

Time Range

Hourly means from 1883, minute means from 1969, to present.

Freshness

Last updated March 2026, indicating active maintenance.

Geography

Global, from approximately 160 observatories worldwide.