Nankai earthquakes

Class of earthquakes in Japan

This article is about megathrust earthquakes that affect the Nankai region specifically. For earthquakes along the Nankai megathrust fault generally, see Nankai megathrust earthquakes.

This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.
Find sources: "Nankai earthquakes" – news · newspapers · books · scholar · JSTOR (April 2024)

|

Nankai earthquakes are caused by ruptures in the west zone (A and/or B segments) of the Nankai megathrust

The Nankai earthquakes (南海地震, Nankai jishin) are major megathrust earthquakes that affect the Nankaidō (Southern Sea Circuit) region of Japan, west of the Tōnankai region (Southeastern Sea) and Tōkai region (Eastern Sea), and are caused by ruptures in the Nankai zone of the Nankai megathrust, specifically segments A and/or B. They occur with a return period of 100 to 200 years, and there is a high probability of one in the 21st century,[1] as the most recent was the 1946 Nankaidō earthquake. These have high destructive potential, and thus are a focus of earthquake preparation.These are a class of Nankai megathrust earthquakes, frequently occurring in combination with, or following, a rupture of segments C and/or D (Tōnankai zone, yielding Tōnankai earthquakes) and sometimes segment E (Tōkai zone, yielding Tōkai earthquakes). They are also known as Nankaidō earthquakes (南海道地震, Nankaidō jishin).

## History

[edit]

Historical Nankai earthquakes are as follows; some of these coincided with or followed earthquakes in the Tōnankai or Tōkai zones, and the 1498 Meiō Nankaidō earthquake may or may not have involved the Nankai zone:

* 684 Hakuho Nankai earthquake
* 887 Ninna Nankai earthquake
* 1099 Kōwa Nankaido earthquake
* 1361 Shōhei Nankaido earthquake
* 1605 Keichō Nankaido earthquake (also Tōnankai: A+B+C+D)
* 1707 Hōei earthquake (also Tōnankai and Tōkai: A+B+C+D+E)
* 1854 Ansei-Nankai earthquake (following 1854 Ansei-Tōkai earthquake the previous day)
* 1946 Nankaidō earthquake (following 1944 Tōnankai earthquake)

## Future risks

[edit]

The Japanese government has estimated as of 2012 that the death toll from a future major earthquake along the Nankai zone could reach 323,000 people. As of January 2024, the Japanese Earthquake Research Committee said that there was a 70 to 80 percent likelihood that a quake with a magnitude of 8.0 to 9.0 would occur near the Nankai Trough within the next 30 years.[2] Following the 2024 Hyūga-nada earthquake on August 8, the Japan Meteorological Agency said that the probability of a "mega earthquake" along the Nankai Trough was now "relatively higher" and raised its first advisory over the matter, but clarified that it was not imminent.[3][4]

## References

[edit]

1. ^ Fukushima, Yo; Nishikawa, Tomoaki; Kano, Yasuyuki (2023-01-10). "High probability of successive occurrence of Nankai megathrust earthquakes". Scientific Reports. 13 (1): 63. doi:10.1038/s41598-022-26455-w. hdl:2433/278851. ISSN 2045-2322.
2. ^ "M7.1 quake hits southwestern Japan, megaquake fear grows". Kyodo News. 8 August 2024. Retrieved 8 August 2024.
3. ^ Osaki, Tomohiro (8 August 2024). "7.1-magnitude Earthquake Hits Off Japan". Barron's. Retrieved 8 August 2024.
4. ^ "Japan sees higher-than-usual risk of megaquake off Pacific Coast". Kyodo News. 8 August 2024. Retrieved 8 August 2024.

This article about an earthquake in Asia is a stub. You can help Wikipedia by expanding it.

|

* v
* t
* e

* v
* t
* e

Earthquakes in Japan

Historical|

* 679 Tsukushi
* 684 Hakuho
* 869 Jōgan
* 1293 Kamakura
* 1361 Shōhei
* 1498 Meiō
* 1586 Tenshō
* 1596 Fushimi
* 1605 Keichō
* 1611 Aizu
* 1611 Sanriku
* 1662 Kanbun
* 1662 Hyūga-nada
* 1677 Bōsō
* 1703 Genroku
* 1707 Hōei
* 1741 Kampo
* 1751 Takada
* 1771 Great Yaeyama
* 1792 Unzen
* 1804 Kisakata
* 1828 Sanjō
* 1833 Shōnai
* 1847 Zenkoji
* 1854 Iga–Ueno
* 1854 Nankai
* 1854 Tōkai
* 1855 Edo
* 1858 Hietsu
* 1872 Hamada
* 1889 Kumamoto
* 1891 Mino–Owari
* 1894 Tokyo
* 1894 Shōnai
* 1896 Sanriku
* 1896 Rikuu

20th century|

* 1909 Anegawa
* 1911 Kikai Island
* 1914 Senboku
* 1922 Shimabara
* 1923 Great Kantō
* 1925 North Tajima
* 1927 North Tango
* 1930 North Izu
* 1933 Sanriku
* 1936 Miyagi
* 1939 Oga
* 1940 Shakotan
* 1941 Hyūga-nada
* 1943 Tottori
* 1944 Tōnankai
* 1945 Mikawa
* 1946 Nankai
* 1948 Fukui
* 1952 Tokachi
* 1961 North Mino
* 1963 Kuril Islands
* 1964 Niigata
* 1968 Ebino
* 1968 Hyūga-nada
* 1968 Tokachi
* 1973 Nemuro Peninsula
* 1974 Izu Peninsula
* 1978 Izu Ōshima
* 1978 Miyagi
* 1982 Urakawa
* 1983 Sea of Japan
* 1984 Nagano
* 1993 Kushiro
* 1993 Okushiri
* 1994 offshore Sanriku
* 1995 Hanshin
* 2000 Izu Islands
* 2000 Tottori

21st century|

* 2001 Geiyo
* 2003 Miyagi
* 2003 Tokachi
* 2004 Chūetsu
* 2005 Fukuoka
* 2005 Miyagi
* 2006 Kuril Islands
* 2007 Chūetsu
* 2007 Kuril Islands
* 2007 Noto
* 2008 Iwate–Miyagi
* 2008 Iwate
* 2009 Shizuoka
* 2011 Tōhoku
* 2011 Nagano
* 2011 Shizuoka
* 2011 Miyagi
* 2011 Fukushima
* 2012 Chiba
* 2012 Sanriku
* 2014 Nagano
* 2015 Ogasawara
* 2016 Kumamoto
* 2016 Tottori
* 2016 Fukushima
* 2018 Osaka
* 2018 Hokkaido Eastern Iburi
* 2019 Yamagata
* 2021 Fukushima
* 2021 Miyagi
* 2021 Chiba
* 2022 Fukushima
* 2023 Noto
* 2024 Noto
* 2024 Hyūga-nada

Related articles|

* Nankai megathrust earthquakes
* Tōkai earthquakes
* Tōnankai earthquakes
* Nankai earthquakes
* South Kantō earthquakes
* Matsushiro earthquake swarm

*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template