“This is why the alerts extend beyond the time of the first wave,” he said.
Supplied/Stuff
University of Auckland associate professor Kasper van Wijk says people should not relax just because first wave times have passed.
Make-up of shoreline affects wave size
Lane said the make-up of a shoreline can multiply or reduce the size of the waves.
“Often the places where there are larger tsunami responses are places where you get resonance in bays or harbours,” she said.
“Every bay and harbour have resonances to do with how long it takes waves to travel to the far end and back.