The Ministry of Civil Defence and Emergency Management has advised that the tsunami, beach and marine threat has now passed.
The largest wave amplitude of 35-40cm was recorded at the Chatham Islands. Other sites in New Zealand have shown wave amplitudes of 15-25cm.
We don't expect significantly larger waves to occur. However, coastal areas will likely experience unusual, strong currents and surges lasting for several more hours.
A tsunami warning was issued for coastal parts of New Zealand after a powerful earthquake shook Mexico.
The Ministry for Civil Defence & Emergency management had issued a tsunami warning for Chatham islands, Pegasus Bay, Northern Coast of Hawke's bay and East Cape.
The earthquake in Mexico is one of the biggest felt there in years, measuring 8.1 on the Richter scale.