<p>The quake struck at 9:05 pm (1735 IST) at a depth of 32 kilometres, in the Molucca Sea. The epicentre was 176 kilometres south of Manado, in Sulawesi, the US Geological Survey said.<br /><br />Indonesia sits on the Pacific "Ring of Fire", where the meeting of continental plates causes high volcanic and seismic activity, and the archipelago is frequently struck by powerful earthquakes.</p>
<p>The quake struck at 9:05 pm (1735 IST) at a depth of 32 kilometres, in the Molucca Sea. The epicentre was 176 kilometres south of Manado, in Sulawesi, the US Geological Survey said.<br /><br />Indonesia sits on the Pacific "Ring of Fire", where the meeting of continental plates causes high volcanic and seismic activity, and the archipelago is frequently struck by powerful earthquakes.</p>