The original earthquake struck Indonesia at 2.08 pm, and first reports said it measured 8.9 on the Richter scale. It spurred warnings of a possible tsunami. The quake was later downgraded to 8.6 magnitude. A second round of tremors was felt in India in Andhra Pradesh, Tamilnadu, Karnataka, WestBengal at 4.25 pm, but there was no tsunami threat from these aftershocks. India's Nicobar Islands, closest to the epicentre of the quake, is still on alert.
The quake was also felt in Singapore, Thailand and India. High-rise apartments and offices on Malaysia's west coast shook for at least a minute. In India, tremors were reported in Mumbai, Kolkata, Bangalore and the southern part of Chennai. The tremors lasted for a few seconds. In Bhubaneshwar, people were seen running out of their homes and offices. No damage has been reported so far.