Neodani Fault - Neodani Fault

Japanese: 根尾谷断層 - ねおだにだんそう
Neodani Fault - Neodani Fault

This is a 35 km long active left-lateral strike-slip fault that runs from near Nogo Hakusan in the west of Gifu Prefecture through Neo in Motosu City to the northwest of Gifu City. During the 1891 (Meiji 24) Nobi earthquake (magnitude 8.0), the largest inland direct-hit earthquake in Japan's history, the Neo Valley fault was active along with the neighboring Nukumi fault and Umehara fault, causing a maximum left-lateral strike-slip surface displacement of about 8 meters. In particular, the 6-meter high fault scarp that appeared near what is now Midori in Neo, Motosu City, is world-famous as a typical example of an earthquake fault, as a clear photograph of it was introduced in an English-language paper by Koto Bunjiro, who was a professor at Tokyo Imperial University at the time. The Neo Valley fault zone is sometimes called the Neo Valley fault zone, including other left-lateral strike-slip active faults that were active during the Nobi earthquake.

[Heitaro Kaneda]

[Reference] | Fault
Neodani Fault
The source fault of the Nobi earthquake that occurred on October 28, 1891 (Meiji 24) with its epicenter in Neo Village (present-day Neo, Motosu City). The photo shows the Neo Mizudori fault cliff inside the Neoya Earthquake Fault Observation Museum, which opened in 1992 (Heisei 4) for the purpose of preserving and exhibiting the fault. Nationally designated special natural monument Motosu City, Gifu Prefecture ©Motosu City ">

Neodani Fault


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

岐阜県西部の能郷白山(のうごうはくさん)付近から本巣市(もとすし)根尾を経て岐阜市北西部付近に至る、長さ約35キロメートルの左横ずれ活断層。国内史上最大級の内陸直下型地震である1891年(明治24)の濃尾(のうび)地震(マグニチュード8.0)の際には、隣接する温見(ぬくみ)断層、梅原断層などともに活動し、最大左横ずれ約8メートルにおよぶ地表変位が生じた。とくに、現在の本巣市根尾水鳥(みどり)付近に出現した高さ約6メートルの断層崖(がい)は、当時、東京帝国大学教授であった小藤文次郎(ことうぶんじろう)の英文論文でその鮮明な写真が紹介されたこともあり、地震断層の典型例として世界的に有名である。なお、濃尾地震時に活動した他の左横ずれ活断層も含めて根尾谷断層帯とよぶことがある。

[金田平太郎]

[参照項目] | 断層
根尾谷断層
1891年(明治24)10月28日に根尾村(現本巣市根尾)を震源として発生した濃尾地震の震源断層。写真は断層の保存・展示を目的として1992年(平成4)に開館した根尾谷地震断層観察館内部の根尾水鳥の断層崖。国指定特別天然記念物 岐阜県本巣市©本巣市">

根尾谷断層


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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