Geomagnetic activity in the past 3 hours

Geomagnetic activity yesterday

Quick Plot

Updates

• The official webpage has been launched for the XXIst IAGA Workshop on Geomagnetic Observatory Instrumentation, Data Acquisition and Processing, to be held at Kakioka Magnetic Observatory in October 2026 (External site)new!
KAKIOKA2026_banner
• The XXIst IAGA Workshop on Geomagnetic Observatory Instruments, Data Acquisition and Processing will be held in 2026
• Quick Plots has been restored. Please continue to use the service.
• English page has been renewed.
• Digital images of analog magnetograms (1962 – 1984) at MMB and KNY published
• 7.5-second data digitized from analog magnetograms (1967 – 1984) at MMB and KNY published
• 1-minute data digitized from analog magnetograms (1967 – 1984) at MMB and KNY published
• 1-second data (1983 02-1993 03) at KAK published
• Digital objective identifier (DOI) now assigned to the data available at Digital Data Service and Monthly Data Viewer (List of data DOIs [pdf 160KB])
• Digital images of analog magnetograms (1924 – 1983) at KAK published
• 7.5-second data digitized from analog magnetograms (1956 – 1983) at KAK published
• 1-minute data digitized from analog magnetograms (1956 – 1975) at KAK published
• 0.1-second data (2019 07– ) at CBI published
• Literature retrieval system provided (for searching Memoirs and Technical Reports of KMO)
• Monthly Data Viewer system provided

About Us

• Introduction to the kakioka magnetic observatory
• Introduction History Organization Service International
• Memambetsu
• Kanoya
• Chichijima

Data

• Quick Plots
• Monthly Overview
• Digital Data Service
• Dynamic Spectra of Geomagnetic Pulsations
• Monthly Data Viewer (Summary Plots, Geomagnetic Event Lists)
• Tokyo Geomagnetic Data

more

Knowledge of geomagnetism

• Geomagnetic Field
• Geoelectric Field
• Magnetic Storms
• Atmospheric Electric Field
• Terms
• Criteria for Geomagnetic Phenomenon Classfication at Kakioka

Notification

• Change of geomagnetic observatory location
• Change in the Nuclear Gyromagnetic Ratio γ_p for Proton Magnetometers
• Announcement on the Geomagnetic 1-second values
• Important Notification on Geomagnetic and Geoelectric 0.1-second values
• Digital Object Identifier (DOI)
• "Magne-chan" the Kakioka Magnetic Observatory mascot

Publications

• Memoirs of the Kakioka Magnetic Observatory
• Technical Report of the Kakioka Magnetic Observatory
• Technical Report of the Kakioka Magnetic Observatory,
  Supplement — Selected Translations
• Literature retrieval for KMO publications
• Report of the Kakioka Magnetic Observatory

Links

• Japan Meteorological Agency
• Meteorological Research Institute
• World Data Center for Geomagnetism, Kyoto
• International Space Environment Service (ISES), Regional Warning Center Japan
• International Association of Geomagnetism and Aeronomy (IAGA)
• IAGA Working Group V-OBS: Geomagnetic Observation
• International Real-time Magnetic Observatory Network (INTERMAGNET)
• Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS)
• Ishioka City