Jackson Bay
Data kindly supplied by National Tidal Centre and NIWA
| Time of arrival of first wave* | 18.3 h |
| Time of arrival of highest wave* | 44.8 h |
| Height of the highest wave | 908 mm |
| Period of the highest wave | 26 min |
* hours after the earthquake.
Commentary
Some small long-period waves arrived early. These may have been tsunami waves, but are more likely meteorological-generated waves. The tsunami peaked, then died away quickly. A meteorologically-generated long-wave event occurred on 30 December.
Figure 1. Sumatra tsunami at Jackson Bay showing:
A. long wave record;
B. height of each wave; and
C. period of each wave.
EQ denotes the time of the earthquake (12:59 on 26 December 2004, NZST),
TOA denotes time of arrival of first waves.
Figure 2. Sumatra tsunami at Jackson Bay showing:
A. long wave record;
B. significant (red) and maximum (blue) wave heights;
C. period of significant waves; and
D. distribution of significant wave height with time and period.
EQ denotes the time of the earthquake (12:59 on 26 December 2004, NZST).
How were these calculated?
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