More than 13,000 people were displaced after a strong earthquake shook Sumatra island, killing at least 10 people and wounding nearly 400.
The 6.2 earthquake hit the island’s northern side at a depth of 12 kilometres, leaving at least seven people dead and dozens more injured.
The two-stage drills off the coast of Indonesia's Sumatra island involved eight warships and four aircraft from Russia, Indonesia, Malaysia, Thailand, Vietnam, Singapore and Brunei.
Some 230,000 people were killed in the Indian Ocean tsunami set off by a magnitude 9.1 earthquake on December 26, 2004. A dozen countries were hit, from Indonesia, to India and Africa's east coast.
Blazes have been raging on Sumatra and Borneo islands with Indonesia deploying water-bombing helicopters and thousands of security forces to tackle them. In recent days, fires sent toxic smog floating over Malaysia triggering a diplomatic row.
Landslides and floods have killed at least 29 people in Indonesia while some 12,000 people have been evacuated.
Indonesian authorities warned of "extreme weather and high waves" around the erupting Krakatau volcano, urging people to stay away from the coast already devastated by a tsunami that killed at least 430 people and left around 21,000 people homeless.
The US Geological Survey said the magnitude 7.0 quake struck at a depth of 10.5 kilometres about two kilometres east-southeast of Loloan.
An Indonesian police spokesman says 77 of the inmates, of approximately 200 who had escaped, had been recaptured. The prisoners escaped after tearing down a gate near a mosque in the prison complex after being allowed out of their cells to pray.
Mount Sinabung which is one of the most active volcanoes in Indonesia erupts and kills more than seven as two are also under critical condition.
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