Japan has informed the data of the M8.5 earthquake to the Indian Ocean coastal nations, the Japan Meteorological Agency said Tuesday.

The agency also warned of tsunami risks after the earthquake which hit at 23:20 Monday near the Sumatra Island.

The Japanese agency said it relayed quake data to Indonesia, Thailand, Sri Lanka, the Maldives, India and Malaysia, which suffered tremendous casualties inflicted by a gigantic tsunami after the Dec. 26 M9.0 quake.