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Tsunami Height Classification - HTML
The Tsunami Height Classification is a five-tier system used by the Japan Meteorological Agency to categorize the estimated maximum tsunami wave heights in tsunami warnings and advisories. Revised on March 7, 2013, based on lessons from the Great East Japan Earthquake, it was simplified from the previous eight-tier system to five tiers (over 10m, 10m, 5m, 3m, 1m). This classification corresponds to three types of warnings: Major Tsunami Warning (over 3m), Tsunami Warning (1m to 3m), and Tsunami Advisory (0.2m to 1m), and is widely used as a guideline for disaster prevention and evacuation actions.
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<table>
<thead><tr><th>code</th><th>slug</th><th>name</th><th>description</th><th>heightRange_max</th><th>heightRange_min</th><th>heightRange_unit</th><th>qualitativeExpression</th><th>warningType</th></tr></thead>
<tbody><tr><td>10m-over</td><td>major-tsunami-warning-10m-over</td><td>Over 10m (Major Tsunami Warning)</td><td>Classification for Major Tsunami Warning where estimated maximum wave height exceeds 10 meters.</td><td></td><td>10</td><td>m</td><td>Huge</td><td>Major Tsunami Warning (Emergency Warning)</td></tr>
<tr><td>10m</td><td>major-tsunami-warning-10m</td><td>10m (Major Tsunami Warning)</td><td>Classification for Major Tsunami Warning where estimated maximum wave height is over 5m and up to 10m.</td><td>10</td><td>5</td><td>m</td><td>Huge</td><td>Major Tsunami Warning (Emergency Warning)</td></tr>
<tr><td>5m</td><td>major-tsunami-warning-5m</td><td>5m (Major Tsunami Warning)</td><td>Classification for Major Tsunami Warning where estimated maximum wave height is over 3m and up to 5m.</td><td>5</td><td>3</td><td>m</td><td>Huge</td><td>Major Tsunami Warning (Emergency Warning)</td></tr>
<tr><td>3m</td><td>tsunami-warning-3m</td><td>3m (Tsunami Warning)</td><td>Classification for Tsunami Warning where estimated maximum wave height is over 1m and up to 3m.</td><td>3</td><td>1</td><td>m</td><td>High</td><td>Tsunami Warning</td></tr>
<tr><td>1m</td><td>tsunami-advisory-1m</td><td>1m (Tsunami Advisory)</td><td>Classification for Tsunami Advisory where estimated maximum wave height is 0.2m to 1m.</td><td>1</td><td>0.2</td><td>m</td><td></td><td>Tsunami Advisory</td></tr></tbody>
</table>