Geomagnetic data
Muroto graph (minutely data)
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Available
11/2004 ～ 06/2024
Definitive data
11/2004 ～ 06/2024
Provisional data
07/2024 ～ 06/2024
Geomagnetic data
MT data
Geomagnetic charts
Aeromagnetic data
Report of geomagnetic survey