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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/gi-2020-13
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2020-13
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 02 Jun 2020

Submitted as: research article | 02 Jun 2020

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This preprint is currently under review for the journal GI.

Muography as a new tool to study the historic earthquakes recorded in ancient burial mounds

Hiroyuki K. M. Tanaka1,2, Kenji Sumiya3, and László Oláh1,2 Hiroyuki K. M. Tanaka et al.
  • 1Earthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-0032, Japan
  • 2International Muography Research Organization (MUOGRAPHIX), The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-0032, Japan
  • 3Graduate School of Informatics, Kansai University, 2-1-1 Ryozenji-cho, Takatsuki-shi, Osaka 569-1095, Japan

Abstract. Bidirectional muographic measurements were conducted at the Imashirozuka burial mound, Japan. The mound was built in the beginning of the 6th century as a megalithic tomb and was later collapsed after a landslide caused by the 1596 Fushimi Earthquake, one of the largest earthquakes that have occurred in Japan over last few centuries. The measurements were conducted in order to find evidence of this past disaster recorded in this historical heritage sites. As a result, the vertical low-density regions were found at the top of the mound. These regions were interpreted as large-scale vertical cracks that caused the translational collapse process behind the rotational landslide that was already found in the prior trench-survey-based works. These results indicate that there was an intrinsic problem with the stability of the basic foundation of the Imashirozuka mound before the 1596 Fushimi Earthquake.

Hiroyuki K. M. Tanaka et al.

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Short summary
Bidirectinal muographic measurements were conducted at the ancient burial mound built in the beginning of the 6th century and later collapsed after a landslide caused by the 1596 Fushimi Earthquake, one of the largest earthquakes over last few centuries in Japan. The result indicated large-scale vertical cracks at the top of the mound, which caused its collapse and thus, an intrinsic problem was suggested with the stability of the basic foundation of the mound before this earthquake.
Bidirectinal muographic measurements were conducted at the ancient burial mound built in the...
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