Â鶹´«Ã½

From Linda McKee

With regard to the article “Rule book rewrite for megaquakes” (23 April, p 6), your diagrams seem to refer to the wrong plate. I thought Japan was part of the Eurasian plate, not the North American plate.

Edinburgh, UK

• The editor writes:

Views on which is the correct plate differ among geologists. Â鶹´«Ã½ went with the North American plate because that’s what the US Geological Survey indicates on its maps.

Edinburgh, UK