Inquiry into false tsunami alarm

An investigation is underway into why tsunami sirens were activated in the Eastern Bay of Plenty this morning.

An investigation is underway to find the cause of a false alarm which triggered tsunami sirens in the Eastern Bay of Plenty.

The siren system along with additional sirens which were recently installed at Coastlands, Waiotahe and Ohiwa, were accidentally activated just before 8am today, with the cause still unknown.

Eastern Bay of Plenty Civil Defence Emergency Management co-ordinator, Jim Tetlow said the false alarm was frustrating, particularly given the timing.

"We have asked Kordia, the contractors responsible for the siren network, to investigate if there was an issue with the pager network, and explain what has happened and how."

Mr Tetlow said the positive that can be taken from false alarm is that a number of people heard the sirens throughout the Eastern Bay, and tuned into, or phoned the local radio station to find out what was happening.

"This is still a man made system, so faults are possible, but it's reassuring to see that people have taken the correct action in response to the alert, and credit to the team at 1XX for reacting so quickly," Mr Tetlow said.

"At the same time, we can't afford to develop a sense of complacency and risk the 'boy who cried wolf' factor that false alarms could bring.

"This has happened the day after a national report has been made public regarding potential tsunami impacts on the country - and only a few hours after a minor quake near White Island - so the timing is less than ideal, to say the least."

Mr Tetlow said he shared the frustration of residents who wanted to be accurately alerted.

"We know from this morning's false alarm that there are a number of residents who are not able to hear the sirens," he said.

"We are currently in the process of identifying additional sites for siren placement."

Mr Tetlow confirmed that the sirens are not a signal to evacuate.

"The siren is the signal to turn on your radio to 1XX for more information.

"It is unlikely the sirens will sound in a local source event, due to the limited time before the arrival of the first wave, so people should take action upon feeling the natural warning signs," Mr Tetlow said.

"If you live near the coast and feel a strong earthquake that makes it hard to stand up, or an earthquake that lasts for a minute or more, you should immediately move inland or to higher ground."