Meanwhile, many people on social networking site such as Facebook posted some messages regarding the possible timings when tsunami is likely to hit Indian coastal regions. [LATEST UPDATE: Indonesia reels under aftershocks of 8.2; India shakes too]
Tsunami is likely to hit Chennai at around 1657 hrs (4:57 PM), Mumbai - 2138 hrs (9:38 PM, Great Nicobar - 1507 hrs (3:07 PM) and Andamans- 1546 hrs (3:46 PM).
According to the tsunami centre's warning, quakes of such a magnitude "have the potential to generate a widespread destructive tsunami that can affect coastlines across the entire Indian Ocean basin". They also said that a wave of 0.2m height is expected.
[UPDATE AT 6:15PM - 3.9-metre high waves witnessed in Andaman Nicobar islands]