Samoa Tsunami at Chatham Islands
| Time of arrival of first wave* | 5.1 h |
| Height of the first wave | 0.028 m |
| Time of arrival of highest wave* | 5.7 h |
| Height of the highest wave | 0.414 m |
| Period of the highest wave | 12.6 min |
* hours after the earthquake.
Commentary
The Chatham Islands are directly in line with Samoa. The largest waves appear to have travelled directly to the Chatham Islands.
Figure 1. Samoa tsunami at Chatham Islands showing:
A. long wave record, denoised to remove spurious waves;
B. height of each wave; and
C. period of each wave.
EQ denotes the time of the earthquake (17:48 on 29 Sep 2009, UTC).
Figure 2. Samoa tsunami at Chatham Islands showing:
A. raw long wave record;
B. distribution of significant wave height with time and period.
EQ denotes the time of the earthquake (17:48 on 29 Sep 2009, UTC).
How were these calculated?
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