Strong earthquake shakes western Indonesia

A strong undersea earthquake has shaken western Indonesia but there are no immediate reports of serious damage or casualties.

The magnitude 6.0 quake on Monday morning was centred 48 kilometres southeast of Singkil, a coastal district in Aceh province, at a depth of 48km, the US Geological Survey said.

No tsunami alert was issued by Indonesia's Meteorology, Climatology and Geophysics Agency.

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 November 21 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 4340 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.