First White Island rumbles, now Mt Ruapehu is making volcanologists sit up

First it was White Island's crater lake that was making scientists sit up - and now it is the one atop Mt Ruapehu.

But the timing of White Island's latest bout of unrest, which culminated in an overnight eruption this week, and a volcanic earthquake swarm 241km away beneath Mt Ruapehu's crater lake should be seen only as a coincidence, a volcanologist says.

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