JAKARTA: A strong undersea earthquake shook western Indonesia on Monday (Jan 16) morning. But there were no immediate reports of serious damage or casualties.
The magnitude 6.2 earthquake was centred 48km south-east of Singkil, a coastal district in Aceh province at a depth of 37km, the United States Geological Survey (USGS) said.
It occurred at around 6.30am local time (10.30pm GMT on Sunday), and USGS revised it up from its initial measurement at 6.0 magnitude with a 48km depth.
Indonesia's Meteorology, Climatology and Geophysics Agency (BMKG) also put it at 6.2 and said that there was no threat of a tsunami, while the country's disaster agency said there were no immediate reports of casualties or major damage.
"The earthquake caused people to panic. It was felt between three to 10 seconds in four districts in Aceh and North Sumatra province," Abdul Muhari, a spokesman for the BNPB disaster mitigation agency, said in a statement.
Indonesia, a vast archipelago of more than 270 million people, is frequently hit by earthquakes and volcanic eruptions because of its location on the "Ring of Fire", an arc of volcanoes and fault lines in the Pacific Basin.
A magnitude 5.6 earthquake on Nov 21 last year killed at least 331 people and injured nearly 600 in West Java's Cianjur city. It was the deadliest in Indonesia since a 2018 quake and tsunami in Sulawesi killed about 4,340 people.
In 2004, an extremely powerful Indian Ocean quake set off a tsunami that killed more than 230,000 people in a dozen countries, most of them in Indonesia's Aceh province.