What is it?
The quake and tsunami that hit central and southern Thailand on Tuesday hit an area where there were a total of 6,000 deaths.
The disaster has killed more than 2,500 people.
What’s the cause?
The tremor, which came on the heels of a series of major earthquakes and tsunamis, was centred in the western part of the island of Koh Kong in the south-east of the country.
The quake was recorded at 6.52am local time (12:52 GMT) and was felt as far away as the southern province of Jambi.
It was followed by a tsunami, which hit at about 11:20am local times (2:20 GMT) in Koh Kong.
Both were felt as deep as 100km (62 miles), according to the US Geological Survey (USGS).
What are the latest developments?
The USGS has said that it has recorded more than 6,700 deaths and 8,300 injuries, while the official death toll has been raised to more than 4,000.
A total of 4,700 people have been killed in the region, according to local government figures.
What is the response?
The country’s government has ordered a nationwide curfew to prevent panic-buying and the reopening of schools and other public buildings, as well as for schools to reopen.
Many businesses have been closed, while hospitals are running without beds, the authorities have said.
Prime Minister Heng Swee Say has urged people to stay in their homes, as the authorities are working to find survivors and those still missing.
More than 500,000 have been ordered to leave their homes by the government, which said in a statement on Wednesday that the number of people who remain in the affected areas has been estimated at over 8,000 people.
The death toll from the tsunami has also risen to 6,100, with around 400,000 still unaccounted for.
The government has set up an emergency hotline for people affected by the disaster to report any new information.
The tsunami has caused damage in areas in western Thailand, including the capital Bangkok, the capital of neighboring Myanmar.
The earthquake struck at about 5:20pm local time, about 10 hours after a tsunami hit the area, with a depth of about 300m.
Some parts of the north-eastern province of Sittwe were hit by tsunami waves.