Saturday, March 12, 2011

Highlights from update 16

The arrival of waves has been measured by tidal gauges at the New Zealand coast. At Raoul Island first arrival was recorded at 0635 hours today and at North Cape at 0710 hours. Additional arrival times have been detected for the North Island and Chatham Islands. Initial wave amplitudes were in the order of 15cm but with measurements of up to 40cm over the last four hours with some harbours reporting amplitudes of up to 50cm and tidal surges. Modelling indicates that the highest wave amplitudes are expected to occur in the period from now until around 1300 hours today. The pattern of wave arrival closely matches that forecast by the modelling that has been undertaken for this event.

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