The "Tsunami Warning" emergency email is a service that simultaneously notifies areas including coastal regions of tsunami warnings issued by the Japan Meteorological Agency. When a tsunami disaster is expected to occur, the Japan Meteorological Agency will issue a major tsunami warning, tsunami warning, or tsunami advisory approximately three minutes after an earthquake occurs.
| kinds | Publication criteria | Announced tsunami height | Expected damage and actions to be taken | Emergency alert email delivery | |
|---|---|---|---|---|---|
| Announcement in numbers (Classification of predicted tsunami height) |
Announcement in case of a major earthquake | ||||
| Large tsunami warning | When the predicted tsunami height exceeds 3m at its highest point. | Over 10m (10m < expected height) |
Huge | Wooden houses were completely destroyed or washed away, and people were swept away by the tsunami. Immediately move away from coasts and rivers and evacuate to a safe place such as high ground or an evacuation building. |
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| 10m (5m < predicted height ≦ 10m) |
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| 5m (3m < predicted height ≦ 5m) |
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| Tsunami Warning | The predicted height of the tsunami is greater than 1m at its highest point, but is less than 3m. | 3m (1m < predicted height ≤ 3m) |
expensive | Tsunamis hit areas with low elevations, causing flooding and people being swept away by the current. Immediately move away from coasts and rivers and evacuate to a safe place such as high ground or an evacuation building. |
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| Tsunami Warning | When the expected tsunami height is between 0.2m and 1m at its highest and there is a risk of disaster caused by a tsunami. | 1m (0.2m≦anticipated height≦1m) |
(Not indicated) | In the ocean, people can get caught in fast currents, aquaculture rafts can be washed away, and small boats can capsize. Get out of the water immediately and away from the coast. |
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The emergency alert email "Tsunami Warning" does not distinguish between a tsunami warning (large tsunami) and a tsunami warning (tsunami).
In addition, we will not provide information regarding the expected arrival time of a tsunami, the expected height of a tsunami, updates or cancellations of tsunami warnings (large tsunami, tsunami), or tsunami advisories. For more detailed information, please check the disaster prevention radio, radio, television, etc.
When a tsunami warning or advisory is issued, it is important for each individual to remain calm and make appropriate decisions and take appropriate action to protect themselves from disasters. It is important to acquire correct knowledge about tsunamis, check evacuation methods and evacuation shelters on a daily basis, and prepare disaster prevention supplies so that you can act calmly in an emergency.
For more information, please visit the Japan Meteorological Agency's Earthquake Early Warning page.