Indonesia`s Geophysical Agency says a series of strong aftershocks measuring 8.2 and 8.3 magnitude have hit off the Sumatra province of Aceh. A new tsunami warning has been issued. The epicenter of the fresh tremors lies further offshore than Wednesday`s quake itself. One aftershock occurred 615 kilometers from the city of Banda Aceh in Northern Sumatra, and 1,061 kilometers from the Malaysian capital Kuala Lumpur.╜ Sea levels in Simeulue Island near the epicenter of the Aceh quake were registered as receding by about 10 meters, a witness informed Reuters. The initial 8.6 magnitude earthquake happened 500 kilometers off the coast of northern Sumatra. The closest city to the quake`s epicenter, which lies 33 km beneath the ocean floor, is Banda Aceh with a population of over 220,000.