digplanet beta 1: Athena
Share digplanet:


Applied sciences






















1771 Great Yaeyama Tsunami
1771 Great Yaeyama Tsunami is located in Ryukyu
1771 Great Yaeyama Tsunami
Date April 24, 1771 (1771-04-24)
Magnitude 7.2 Ms[1]
Epicenter 24°00′N 124°18′E / 24.0°N 124.3°E / 24.0; 124.3Coordinates: 24°00′N 124°18′E / 24.0°N 124.3°E / 24.0; 124.3
Areas affected Ryūkyū Kingdom: Ryukyu Islands
Tsunami yes
Casualties 13,486 deaths

The 1771 Great Yaeyama Tsunami (also called 明和の大津波, the Great Tsunami of Meiwa) was caused by the Yaeyama Great Earthquake at about 8 A.M. on April 24, 1771, south-southeast of Ishigaki Island, part of the former Ryūkyū Kingdom and now forming part of present day Okinawa, Japan. According to records, 8,439 persons were killed on Ishigaki Island and 2,548 on Miyako Island.

Obi Rock on Shimoji island, Miyakojima. The rock is said to have been left by the tsunami.
Sawada beach on Shimoji island. The rocks are believed to be remnants of the tsunami

Earthquake analysis[edit]

According to the Japanese government publication Rika-Nenpyō (理科年表) or Chronological Scientific Tables,[2] the epicenter was 40 km south-southeast of Ishigaki Island with a magnitude of 7.4. According to the Mamoru Nakamura Laboratory, University of the Ryukyus, the earthquake was due to the activity of the fault east of Ishigaki and it is estimated that the magnitude was 7.5. [3] Further simulation led to the activity of faults in the Ryukyu oceanic trench and the magnitude was 8.0. The depth was 6 kilometres (3.7 mi). [4] This trench lies between the Philippine Sea Plate and the Eurasian Plate.


The dead and missing amounted to 12,000 people, and more than 2,000 houses were destroyed on Ishigaki and Miyakojima. Agriculture was severely damaged because of sea water invasion and the population decreased to about one third of what it was before the earthquake. On Ishigaki island, the wave was 40 to 80 meters high. There are many huge rocks believed to have been left by the earthquake. There was a legend that an islet disappeared, but this has never been verified.

See also[edit]


  1. ^ National Geophysical Data Center. "Comments for the Significant Earthquake". Retrieved 22 July 2011. 
  2. ^ http://www.rikanenpyo.jp/
  3. ^ [1]
  4. ^ http://seis.sci.u-ryukyu.ac.jp/hazard/EQ/1771yaeyama2/1771tsunami_2.html Meiwa earthquake was magnitude 8

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/1771_Great_Yaeyama_Tsunami — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
6 videos found

Worst Tsunamis in History - Best to Worst

1792 Mount Unzen 2010 Sumatra Earthquake/Tsunami 2010 Chile Earthquake/Tsunami 2011 Tohoku Earthquake/Tsunami 1883 Eruption of Krakatoa 1707 Hoei Earthquake ...

Worst Tsunamis in History

1771 Great Yaeyama Tsunami 2010 Sumatra Earthquake/Tsunami 1707 Hoei Earthquake 1896 Meiji-Sanriku Earthquake 1755 Lisbon Earthquake/Tsunami/Fire 1868 Arica ...

Worst Tsunamis in History

1771 Great Yaeyama Tsunami 1896 Meiji-Sanriku Earthquake 2010 Chile Earthquake/Tsunami 1792 Mount Unzen 2011 Tohoku Earthquake/Tsunami 1755 Lisbon Earthquake...

Worst Tsunamis in History

1868 Arica Earthquake/Tsunami 1896 Meiji-Sanriku Earthquake 1707 Hoei Earthquake 1792 Mount Unzen 1883 Eruption of Krakatoa 2011 Tohoku Earthquake/Tsunami 17...

Best List - Worst Tsunamis in History

1707 Hoei Earthquake 2010 Sumatra Earthquake/Tsunami 2011 Tohoku Earthquake/Tsunami 1792 Mount Unzen 1755 Lisbon Earthquake/Tsunami/Fire 1868 Arica Earthquak...

Ishigaki island in Japan is amazing

eleven ishigaki,a&w ishigaki,b&b ishigaki,boeuf d ishigaki,come arrivare a ishigaki,comment aller a ishigaki,como llegar a ishigaki,emix ishigaki,entourage i...

6 videos found

We're sorry, but there's no news about "1771 Great Yaeyama Tsunami" right now.


Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight