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The institute said the quake, which occurred at 11.35am local time, hit at a depth of 10 kilometres, about 22 kilometres northeast of Dalupiri, an island village in Calayan town, reported Xinhua.
The institute said the tectonic quake will trigger aftershocks but will not cause damage.
The archipelagic Philippines has frequent seismic activities due to its location along the Pacific "Ring of Fire". - BERNAMA