What is the largest earthquake we shold prepare for?

Authors=MATSUZAWA Toru

Journal/Book_names=Report of the Coordinating Committee for Earthquake Prediction

number=89

pages=446-449

Publish_year=2013

Publish_Country=JPN

Publisher=Geospatial Information Authority of Japan

Language_of_Text=JA

ISSN=02888408

ID=201321802