The flight data recorder from Lion Air flight JT610, which crashed on Monday with 189 people aboard, could provide insight into the cause of the disaster.
Remains of dozens of people have been recovered in the aftermath of the crash of the plane with 189 aboard. Searchers have located a large object underwater that could be the plane's fuselage.
Rescue teams are searching for Lion Air Flight 610's black box and trying to recover bodies and wreckage. Finding survivors "would be a miracle," a search and rescue spokesman said.
The Lion Air Boeing 737-800 crashed into the sea shortly after leaving Jakarta's international airport. Indonesian television showed video of an oil slick and debris field.
The official death toll for the disasters stands at 2,073. But the number of those still missing could be as high as 5,000, after the quake caused the ground to liquefy.
Prisoners at the Donggala District Prison rioted as the earthquake and tsunami hit last month. The warden opened the doors — but now, after checking on their families, many inmates have come back.
Nearly a week since a huge earthquake and tsunami, rescuer and relief workers are fighting to overcome delays and despair in Indonesia. Meanwhile, the death toll has grown to more than 1,500 people.
The disasters crippled communications and damaged roads — problems that are also complicating efforts to bring aid to the city of Palu and other affected areas.
Communications are still down to some of the hardest-hit regions on the island of Sulawesi. "This is already a tragedy, but it could get much worse," says one aid official.