The size of the 1700 Cascadia earthquake predicted by Kenji Satake was 8.7.
 Along with Brian Atwater and David Yamaguchi, Satake assembled disparate pieces of information regarding a Japanese tsunami that had no known origin. 
The 1700 Cascadia earthquake occurred along the Cascadia subduction zone on January 26 with an estimated moment magnitude of 8.79.2. 
