6.1-magnitude quake strikes off Indonesia's Sumatra island

School students and staff gather in an open area after a magnitude 6.4 earthquake struck near Mentawai Islands, in South Nias, North Sumatra, Indonesia August 29, 2022 in this screen grab obtained from a social media video. Facebook/Doniman Aro Harefa/via REUTERS

A 6.1-magnitude earthquake struck off the coast of Indonesia's Sumatra island, the third tremor to rattle the area since early Monday, according to the country's geophysics agency.

Indonesia's meteorology and geophysics agency (BMKG) recorded the shallow quake off the Mentawai islands, off Sumatra's west coast just before 10.30 a.m. and said it did not trigger a tsunami warning.