‘Possible early warning signal’: Volcanic activity rises beneath Mt Ruapehu

RNZ3 Aug, 2026 07:26 AMQuick ReadThere has been a gradual increase in a volcanic tremor at Mt Ruapehu since July 22. Photo / RNZ, Alison BallanceThere has been a gradual increase in a volcanic tremor at Mt Ruapehu since July 22. Photo / RNZ, Alison BallanceBy RNZScientists are monitoring Mt Ruapehu after an increase in volcanic activity has been detected.It is in a state of minor unrest, with the constant tremor beneath the volcano having increased from a weak to moderate level.

Geologist Michael Rosenberg said it could be an early warning sign