Jan 19 (Reuters) - BHP Group on Thursday reported a 1% rise in second-quarter iron ore production, boosted by a ramp-up at its South Flank operations and reduced labour constraints.

The world's largest listed miner said iron ore production from Western Australia on a 100% basis was 74.3 million tonnes (mt) for the three months ended December, up from 73.9 mt a year earlier.

That compares with a consensus of 71.9 mt, according to Goldman Sachs. (Reporting by Harish Sridharan and Himanshi Akhand in Bengaluru; Editing by Sriraj Kalluvila)