Singapore broadcaster Channel NewsAsia said it received calls from residents in the city state who felt tremors.
Sri Lanka's Disaster Management Center (DMC) said on Sunday there was no tsunami threat to the island country following a 6.5 magnitude quake which struck off Indonesia's Sumatra.
He said officials were checking if there were any casualties or damage.
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An quake measuring 6.6 richter scale struck off Bengkulu province, western Indonesia on August 13, the local meteorology and geophysics agency said. It forced her to flee her house along with her family members.
Singaporeans living in Toa Payoh and Farrer Road said that they also felt tremors.
The world's largest archipelago, Indonesia is prone to earthquakes because of to its location on the Pacific " Ring of Fire", an arc of volcanoes and fault lines in the Pacific Basin. An quake struck Indonesia's western Aceh province in December 2016, killing more than 100 people, injuring many more and leaving tens of thousands homeless.