GeoNet is reminding Kiwis to "always be prepared" for a major disaster after heightened earthquake activity in the Kermadec region just north of New Zealand.
The active plate boundary in the region has the potential to cause an earthquake "large enough to produce a tsunami", duty seismologist Chris Van Houtte warns.
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GeoNet measured 10 earthquakes of more than magnitude-4.9 in the Kermadec region in the last 24 hours - the strongest of which was magnitude-6.4.
So far, the quakes have not posed a threat to New Zealand, and have largely gone unfelt here - but Mr Van Houtte warns that "in seismically active zones, large earthquakes can occur at any time".
He said that although the quakes are considered "heightened activity", but they are not uncommon - and it doesn't necessarily mean there will be a bigger quake coming.
But he says Kiwis should be prepared, as an emergency could strike at any time.
"Always be prepared for a large and/or damaging quake, know tsunami warning signs and the correct actions to take if a tsunami warning is issued."