<p> An earthquake of magnitude 5.1 struck the US state of Oklahoma on Saturday, the European-Mediterranean Seismological Centre (EMSC) said.</p><p>The quake, revised from 5.5 magnitude initially, was at a depth of 6 km (3.73 miles) EMSC said. </p>
<p> An earthquake of magnitude 5.1 struck the US state of Oklahoma on Saturday, the European-Mediterranean Seismological Centre (EMSC) said.</p><p>The quake, revised from 5.5 magnitude initially, was at a depth of 6 km (3.73 miles) EMSC said. </p>