Comment on "The Great Sumatra-Andaman Earthquake of 26 December 2004"

Lay et al . (Research Articles, 20 May 2005, p. 1127) estimated a 600-km length for the tsunami source region. Adding tide-gauge data from Paradip, the northernmost of the Indian east-coast stations and therefore the most critical constraint on the northern extent of the source, we estimate that its length was greater by ∼30%.