<p>A 5.6-magnitude earthquake struck off Indonesia's Sumatra island today, seismologists said, but there were no immediate reports of damage or casualties.<br /><br /></p>.<p>The quake struck 75 kilometres west of Banda Aceh just after 1630 IST at a depth of more than 35 kilometres, the US Geological Survey said.<br /><br />An AFP correspondent in Banda Aceh said people ran from their homes as the ground shook for about 30 seconds.<br /><br />Indonesia sits on the Pacific "Ring of Fire" where continental plates collide, causing frequent seismic and volcanic activity.<br /><br />The Indian Ocean tsunami of 2004 devastated Indonesia, where 170,000 people were killed, mostly in Aceh province. </p>
<p>A 5.6-magnitude earthquake struck off Indonesia's Sumatra island today, seismologists said, but there were no immediate reports of damage or casualties.<br /><br /></p>.<p>The quake struck 75 kilometres west of Banda Aceh just after 1630 IST at a depth of more than 35 kilometres, the US Geological Survey said.<br /><br />An AFP correspondent in Banda Aceh said people ran from their homes as the ground shook for about 30 seconds.<br /><br />Indonesia sits on the Pacific "Ring of Fire" where continental plates collide, causing frequent seismic and volcanic activity.<br /><br />The Indian Ocean tsunami of 2004 devastated Indonesia, where 170,000 people were killed, mostly in Aceh province. </p>