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Residents along Christchurch’s coastline will hear a tsunami sirens test coinciding with the end of daylight saving.

Forty-five sirens between Brooklands and Taylors Mistake will sound for up to three minutes at 11am on Sunday 6 April as part of their regular testing.

The tsunami warning sirens are part of a network designed to provide an early warning for distant-source tsunamis, which could take over three hours to reach Christchurch’s coastline.

Tests are conducted twice a year –at the start and the end of daylight saving. Residents will hear a tone followed by the message: “This is a test of the tsunami warning sirens. Do not be alarmed. This is only a test.”

"The sirens are just being tested, and there is no need for anyone to evacuate. This is simply a routine check to ensure the system is functioning properly," Christchurch City Council Civil Defence and Emergency Management Manager Brenden Winder said.

While this is just a standard test, Mr Winder said it’s a great time for coastal residents to ensure they’re prepared in case of a real emergency. 

"We encourage everyone to review their evacuation plans and make sure they have all the necessary supplies ready, just in case.” 

In the event of an immediate tsunami threat, Civil Defence and New Zealand Police would use the cellphone based Emergency Mobile Alert system, radio, television, social media, sirens and local community networks to alert residents.

To find out whether you live or work in a tsunami evacuation zone, visit Christchurch City Council’s interactive online map.

Evacuation tips and more information can also be found on the Council’s website.