気象庁による火山観測の沿革と現状

概要

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The volcanological work of the Japan Meteorological Agency (JMA) has been expanding rapidly after the 2nd World War. Especially, since 1962, the JMA has been making every effort to establish systematic observation of all the active volcanoes in our country. The JMA divides them into three classes (A, B and C), depending upon the natural and social conditions of the respective volcano. At present, the observations of the activities are performed permanently by the JMA at 17 volcanoes. The observatories at 4 A-class and 11 B-class active volcanoes are equipped with up-to-date instruments. The wire or wire-less tele-recording system is adopted to the seismometrical observations with succss at those active volcanoes. Besides, the JMA has 3 teams of volcanologists (emergency missions) at the headquarters in Tokyo, and they carry out periodical precise spot survey of the designated B- and C-class active volcanoes, too. Such being the case, the volcano observatories under the JMA are obliged to issue "Kazan Joho" (Volcano Informations) on the actual state of the volcanic activities whenever they detect any extra-ordinary volcanic phenomena at their own volcanoes. Moreover, A-class volcano observatories are bound to give out regular "Kazan Joho", monthly. The results of the volcanological observations made by the JMA are published as the Volcanological Bulletin of the JMA (quarterly) in English.
特定非営利活動法人日本火山学会の論文
1965-12-20