The Survey of India has noted that the tsunami hit Cuddalore at 08.00 a.m. (IST), Chennai at 08.40 a.m. (IST), and Paradip, Machillipatanam and Vishakhapatnam at 09.00 a.m. (IST).
Source: NIO
Red arrow: approximate time of
occurrence of the earthquake off
Sumatra
Blue arrow : time of arrival of the
      disturbance at the tide gauge
Department of Ocean Engineering, IIT Madras, Chennai , India – 600 036
TIDAL RECORDS ALONG
 INDIAN COAST