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powerful earthquake struck on Wednesday evening off the west coast of Sumatra Island, no fatalities were reported.

The Meteorology, Climatology and Geophysics Agency (BMKG) initially said the quake measured 8.3 on the Richter scale before revising it downward to 7.8.

The US Geological Survey (USGS) said earlier that the magnitude measured 8.2 on the Richter scale, then 8.1, before lowering it to 7.9.

The epicenter of the quake was located 808 kilometers southwest of Padang and was 10 km deep, the USGS said.

Mentawai, the regency closest to the epicenter and left devastated by the 2004 Indian Ocean quake, was reported to have no damage.

Head of BMKG Padang Panjang Rahmat Triyono said that hundreds of people in the Mentawai Islands and western coast of Sumatra rushed to find higher ground after it issued a tsunami warning. The warning was then lifted.

Bambang Sagurung, a resident of Siberut Island in Mentawai, said the quake was strong, but did not cause damage to his home.

'€œI was having dinner with my family, the water dispenser was shaking and then we got out the house. I felt another quake after the first one, and then we rushed toward the hill,'€ he told The Jakarta Post over the phone.

Another resident of Siberut, Mariai, said a warning was placed for one-and-a-half hours after the 7.8-magnitude quake rocked the island.  

National Disaster Mitigation Agency (BNPB) spokesperson Sutopo Purwo Nugroho said there had not been any reports of injuries or damage following the quake.

'€œWe haven'€™t received any reports of injuries or damage. Based on the information that we have gathered, the tsunami warnings were issued in Aceh, Bengkulu and Lampung,'€ he said in a statement.