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Conference Paper

Seismic activity in southern Miyagi Prefecture in the 18th century revealed from "Takano Family Record”

Authors

Urushibara,  Sunao
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kano,  Yasuyuki
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ohmura,  Junzo
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Urushibara, S., Kano, Y., Ohmura, J. (2023): Seismic activity in southern Miyagi Prefecture in the 18th century revealed from "Takano Family Record”, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4735


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021143
Abstract
"Takano Family Record” is investigated to reveal seismic activity in southern Miyagi Prefecture in the 18th century. "Takano Family Record" is a diary recorded by the successive heads of the Takano family between 1696 and 1782 and is included in a published collection of historical documents on earthquakes in Japan. About 150 days of felt records are newly found from our investigation of microfilmed original records kept in the library of the Graduate School of Arts and Letters, Tohoku University. Comparison between the number of felt earthquakes recorded in the "Takano Family Records" that observed by modern observations shows that the author of the "Takano Family Records" recorded earthquakes of JMA seismic intensity 2 or higher, as well as some earthquakes of intensity 1. "Takano Family Records" also contains descriptions of earthquake damage. Location and magnitude of the May 4, 1767 and October 22, 1767 earthquakes are reexamined from distribution of damage and felt records as well as the number of aftershocks.