A magnitude 6.1 quake struck off Indonesia in the Moluccas on Monday, the U.S. Geological Survey said, Reuters reported.
The quake was centered 51 miles (83 km) northwest of Ternate at a shallow depth of 9.4 miles (15 km) below the seabed, which would have amplified its effect.
Indonesia is in the so-called Ring of Fire and is earthquake-prone.