Global Geomagnetic Observatory Annual Means Since 1840

160 observatories worldwide provide annual means of the geomagnetic field vector components, tracking internal Earth field changes from 1840 to present. Data is produced by organizations including the British Geological Survey and is available in plain text format.

Use Cases

• Analyze long-term secular variation trends in geomagnetic vector components across the 160 global observatories.
• Model the Earth's internal magnetic field generation using over 180 years of annual means data.
• Correlate geomagnetic component changes with solar cycle activity using the multi-decadal time series.
• Validate global geomagnetic models against the historical observatory record starting in 1840.

Strengths

• Data spans over 180 years, from 1840 to the present day.
• Global coverage from approximately 160 observatories.
• Produced by authoritative organizations including the British Geological Survey (BGS).

Limitations

• Data format is HTML, which is non-standard for numerical analysis and requires parsing.
• Specific column definitions and row counts are not provided in the metadata.
• Data is connected to other geomagnetic datasets, which may complicate standalone use.

Provenance

Source

British Geological Survey (BGS) and other global organizations.

Collection Method

Annual means calculated from geomagnetic field vector measurements at observatories.

Time Range

1840 to present day.

Freshness

null

Geography

Global, from approximately 160 observatories worldwide.