09-Feb-2008 Rissaga at Akaroa 

Data kindly supplied by Christchurch City Council.


The rissaga was not strongly felt at Akaroa, possibly because of its sheltered aspect to waves from the east.

Figure 1. Long waves at Akaroa, showing: A. long wave record; B. individual wave heights (red dots) and high tide times (green diamonds); C. individual wave periods; and D. distribution of significant wave height with time and period. Times are in NZST (UTC + 12).

How were these calculated?
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