Geophysicist. Born in Chiba Prefecture. Graduated from the Department of Physics, Faculty of Science, Tokyo Imperial University in 1901 (Meiji 34). After serving as a professor at Hiroshima Higher Normal School and First Higher School, he became an assistant professor at the Faculty of Science and Technology, Kyoto Imperial University, which was founded in 1909, and conducted research on earth tides and earthquakes at the attached Kamigamo Seismological Observatory. He noticed the regularity in the distribution of initial motions of seismic waves early on, but it was not until 1917 (Taisho 6) that he was made a professor the following year, in 1918. He also noticed the existence of deep earthquakes early on, but it was not until 1926 that he made an announcement. He also made pioneering achievements in volcano research, opening a geophysical research institute in Beppu in 1924 and the Aso Volcano Observatory in 1928 (Showa 3). In 1929, he was awarded the Imperial Academy Prize for his research on "the rigidity of the earth and crust, and seismic motion." [Yoichiro Fujii] [Reference items] | | | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
地球物理学者。千葉県出身。1901年(明治34)東京帝国大学理科大学物理学科卒業。広島高等師範学校教授、第一高等学校教授を経て、1909年創立まもない京都帝国大学理工学部助教授となり、付設の上賀茂(かみがも)地震観測所で地球潮汐(ちょうせき)および地震の研究を行った。地震波の初動分布の規則性に早くから気づいていたが、ようやく1917年(大正6)に発表された。翌1918年教授。また深発地震の存在にも早くから注目していたが、1926年になって発表された。1924年別府に地球物理学研究所を開き、1928年(昭和3)には阿蘇(あそ)火山観測所を開設するなど、火山研究のうえでも開拓的な業績がある。1929年「地球及び地殻の剛性ならびに地震動に関する研究」で学士院恩賜賞受賞。 [藤井陽一郎] [参照項目] | | | |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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