8 years ago, Great subduction zone Tohoku-oki Mw = 9.1

On March 11, 2011, at 2:46 p.m., a magnitude-9.1Mw earthquake shook the Tohoku region in Japan, causing a tsunami and killing 29.000 people.

Century-Old 'Tsunami Stones' Saved Lives In the Tōhoku Earthquake

A tsunami stone. Photo by T. Kishimoto, CC BY-SA 4.0T.KISHIMOTO

Poster by USGS:

Sources:

https://www.forbes.com/sites/davidbressan/2018/03/11/how-century-old-tsunami-stones-saved-lives-in-the-tohoku-earthquake-of-2011/#1b976f3e44fd

http://earthjay.com/?page_id=982

https://www.usgs.gov/