Geomagnetic data
Akaigawa graph (minutely data)
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Available
01/2001 ～ 06/2024
Definitive data
01/2001 ～ 06/2023
Provisional data
07/2023 ～ 06/2024
Geomagnetic data
MT data
Geomagnetic charts
Aeromagnetic data
Report of geomagnetic survey