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Sekiya Seikei (関谷 清景, 28 January 1855 – 8 January 1896), alternatively Sekiya Kiyokage, was a Japanese geologist, one of the first seismologists, influential in establishing the study of seismology in Japan and known for his model showing the motion of an earth-particle during an earthquake.

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  • Seikei Sekiya (it)
  • 関谷清景 (ja)
  • Sekiya Seikei (en)
  • 關谷清景 (zh)
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  • 関谷 清景（せきや きよかげ（後に せいけい）、安政元年12月11日（1855年1月28日） - 明治29年（1896年）1月8日）は、日本人初の地震学者。世界初の地震学教授。 (ja)
  • Seikei Sekiya (28 gennaio 1855 – Tokyo, 8 gennaio 1896) è stato un geologo e sismologo giapponese. Docente all'università di Tokyo dal 1886, a lui si deve l'organizzazione dell'intero sistema sismologico giapponese. (it)
  • 關谷清景（日语：関谷 清景，1854年－1896年）是日本第一位地震学家。出生於美濃國（岐阜縣）。東京大學教師。從五位受位者。 (zh)
  • Sekiya Seikei (関谷 清景, 28 January 1855 – 8 January 1896), alternatively Sekiya Kiyokage, was a Japanese geologist, one of the first seismologists, influential in establishing the study of seismology in Japan and known for his model showing the motion of an earth-particle during an earthquake. (en)
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  • Sekiya Seikei (en)
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  • Sekiya Seikei (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Sekiya_Seikei.jpg
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  • Japan (en)
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  • Japan (en)
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  • Geology and Seismology (en)
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  • Japanese (en)
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  • Sekiya Seikei (関谷 清景, 28 January 1855 – 8 January 1896), alternatively Sekiya Kiyokage, was a Japanese geologist, one of the first seismologists, influential in establishing the study of seismology in Japan and known for his model showing the motion of an earth-particle during an earthquake. Sekiya took up the study of the earthquakes in 1880. In 1886, he was appointed as the first professor of seismology at what was to be the University of Tokyo, the first such full-time university appointment in the world. In this position, he helped in the extension of the seismic survey in Japan and in the erection of seismographs throughout the country. In 1886, the number of observing stations was over 600. In 1896, at the time of his death it had risen to 968. Outside the scientific community, Sekiya is best known for the model representing the motion of the ground during an earthquake, inspired by the Tokyo earthquake of 1887. His earthquake model consists of three twisted copper wires that are mounted side by side on a lacquered wooden stand. The wire diagram gives an illustration of the complicated movements of the ground during an earthquake, conveying the complexity of ground motion, both in terms of the vagaries of its geometric path and in its erratic accelerations. Sekiya's original copper-wire model now resides in the Whipple Museum of the History of Science at Cambridge University. According to Hudson (1992 p. 6), "His measurements and calculations of ground displacement and acceleration of the 1887 Japanese earthquake were the first estimates of ground motion based on reasonably accurate data." After spending several months studying the new crater and the devastated areas subsequent to 1888 eruption of Mount Bandai, he published together with Y. Kikuchi a report in English (“The eruption of Bandai-san” Tokyo Imperial University College of Sciences Journal 3 (1890), pp 91–171), which is considered a classic in volcanology. (en)
  • 関谷 清景（せきや きよかげ（後に せいけい）、安政元年12月11日（1855年1月28日） - 明治29年（1896年）1月8日）は、日本人初の地震学者。世界初の地震学教授。 (ja)
  • Seikei Sekiya (28 gennaio 1855 – Tokyo, 8 gennaio 1896) è stato un geologo e sismologo giapponese. Docente all'università di Tokyo dal 1886, a lui si deve l'organizzazione dell'intero sistema sismologico giapponese. (it)
  • 關谷清景（日语：関谷 清景，1854年－1896年）是日本第一位地震学家。出生於美濃國（岐阜縣）。東京大學教師。從五位受位者。 (zh)
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