Meanwhile, a tsunami warning has been issued to 28 countries including India. [UPDATE: Indonesia reels under aftershocks of 8.2; India shakes too]
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.
Tremors were felt across Chennai, Bangalore, Kolkata, Patna, Thiruvananthapuram, Kochi, Cuttack, Bhubaneshwar and several other cities situated on the eastern coast of India. [Read: Chennai gets holiday after tsunami fears on Wednesday]
Meanwhile, no casualties have been reported so far and people have been asked to move away from the coasts.
[UPDATE AT 6:14PM - 3.9-metre high waves witnessed in Andaman Nicobar islands]