People in Kawerau have been on edge over the weekend with a large swarm of earthquakes rattling the town.
Some businesses had to shut down with stock repeatedly thrown from shelves, and some people have decided to leave town for a few days until the shaking stops.
And now a crack may have formed in the side of nearby Mount Putauaki, a dormant volcano on the edge of the Taupo Volcanic Zone.
GNS Science Duty Seismologist John Ristau spoke to Kim Hill.
