<p>An earthquake of magnitude 6.4 struck south of Tonga, the European Mediterranean Seismological Centre (EMSC) reported on Sunday.</p>.<p>The quake was at a depth of 40 km (25 miles), EMSC said.</p>.<p>EMSC had first reported a magnitude of 6.1 for the earthquake. </p>
<p>An earthquake of magnitude 6.4 struck south of Tonga, the European Mediterranean Seismological Centre (EMSC) reported on Sunday.</p>.<p>The quake was at a depth of 40 km (25 miles), EMSC said.</p>.<p>EMSC had first reported a magnitude of 6.1 for the earthquake. </p>