Hundreds of residents fled an Indonesian port town for higher ground today when an earthquake struck south of Java with a magnitude estimated by US seismologists at 6.7.

The epicentre in the Indian Ocean was 24 km miles deep, the US Geological Survey said, after initially estimating it at 10 km underground and 277 km south of the Javanese coast.

Indonesian seismologists put the magnitude at 7.1 and issued a tsunami warning, saying the tremor had the potential to cause a killer wave and asking the recipients of its public alert SMS to warn others of the danger. The warning was later cancelled.

Mr Suharjono, technical head of Indonesia’s Meteorology and Geophysics Agency, who like many Indonesians uses only one name, said shaking from the tremor had been felt in Pangandaran and Cilacap districts in Java.

“This quake roused people from their sleep,” he said. “We have not received any reports of damage or casualties so far.”

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