Indonesia suffers frequent earthquakes, straddling the so-called 'Pacific Ring of Fire,' a seismically active zone where different plates of the earth's crust meet.

At least three people were killed and survivors were left huddled under makeshift shelters.

Many question if the decommissioning of the nuclear plant's melted reactors can ever be completed.

Tsunami warnings have also been also issued for other Pacific islands including Tonga, American Samoa, Fiji, Vanuatu, Hawaii and others.