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Table 6 Estimated ages of tsunami deposits and their correlation with historical tsunami events

From: Historical and paleo-tsunami deposits during the last 4000 years and their correlations with historical tsunami events in Koyadori on the Sanriku Coast, northeastern Japan

  Age [BP] Most probable historical event Tephra
E1   2011 Tohoku-oki Earthquake Tsunami  
E2 Modern–290 1896 Meiji Sanriku Tsunami  
E3 0–620 1611 Keicho Sanriku Tsunami  
E3/E4    To-a (AD 915)
E4 1000–1350 869 Jogan Tsunami?
(no historical document around Koyadori)
 
E5 1000–1700   
E6 1000–1700   
E7 1520–1700   
E8 2180–2490   
E9 2340–2750   
E10 2840–3860   
E11 2880-3860