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Twin quakes rattle Indonesia's Sumatra: United States Geological Service

The Straits Times 09 November 2015 Indonesia Sumatra

PADANG (AFP) - Two powerful quakes struck Indonesia's Sumatra on Sunday, US seismologists said, but no tsunami warning was issued and there were no immediate reports of damage or casualties.
An initial 6.1-magnitude undersea tremor struck at a depth of 75 kilometres in the afternoon, the US Geological Survey (USGS) said.
It was followed around seven hours later by a strong 6.4-magnitude quake, also at sea, at a depth of 7.7 kilometres , USGS reported.