Depending on how the earthquake occurs, a tsunami may occur suddenly or upstream. Even if you do not feel the shaking, a distant earthquake may bring a tsunami.

When a huge wave with submarine sediment – a very destructive tsunami – hits the coast – ships, houses, cars, etc. can be instantly swallowed up and even washed up to unexpected heights.

The speed of the tsunami is extremely fast, so if you see a tsunami on the coast, then it may already be too late because you can not run away from the speed of the tsunami.
Moreover, the tsunami will come again and again and the height of the first wave may not be as high as the second wave that follows because it cannot be predicted.

Therefore, whether it is only a slight shaking from a mild earthquake, you should be aware of the possibility of tsunami and evacuate in time.

---