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A Recent Japanese Earthquakes


AN unusually great earthquake was felt in and about Tokio on October 15, 1884. The annexed autographic record of it comes, with the following particulars, from my former assistant, Mr. K. Sekiya, who is now in charge of the seismological observatory of the University of Tokio. It was given by a horizontal pendulum seismograph of the kind recently described in NATURE (vol. xxx. p. 150), and it has many features in common with the examples of records shown on pp. 174 and 176 of the same volume, But in the present case the amplitude of the earth's horizontal movement far exceeds anything that has been recorded since observations of this kind were instituted in 1880.

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  1. See "Measuring Earthquakes" (NATURE, vol. xxx. p. 150), or a "Memoir on Earthquake Measurement" (Tokio, 1883, p. 22).

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EWING, J. A Recent Japanese Earthquakes . Nature 31, 581–582 (1885).

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