A precursor to a tsunami? What are the signs before a tsunami?

Fish rush to the beach, the sea rolls,—— tsunami is foreshadowed.

Tsunamis are a very harmful disaster, and it is common for the tsunami to retreat or swell before landfall. Not far from the shore, the sea suddenly turned white, and in front of it a "wall of water" appeared, accompanied by a loud rumbling sound. And the ships in the shallow waters of the world suddenly appeared violently up and down, back and forth to amuse.

In addition, the presence of a large number of deep-sea fish along the coast and the sizzling sound of the sea are signs of a tsunami.

In tsunami-prone countries or regions, tsunami escape routes are set up along the beach. Therefore, when traveling by the sea, it is important to know the escape routes in this area in advance, so that you can evacuate quickly if you detect the signs of a tsunami or hear a tsunami warning.

A tsunami is a catastrophic wave that is usually caused by a seabed with an epicenter within 50 km below the seafloor and a magnitude of 6 5 or more on the Richter scale. Tsunamis can also be caused by landslides or volcanic eruptions underwater or along the coast. After a shock, the ** wave travels a long distance in an ever-expanding circle on the surface of the sea, just like the wave produced by a pebble falling into a shallow pool.

The tsunami wavelength is greater than the maximum depth of the ocean, and the orbital motion is not much hindered near the ocean floor, and the wave can propagate regardless of the depth of the ocean.

The earliest signal for a tsunami is a strong shaking of the ground, and there is a time lag between the arrival of the wave and the tsunami, which is just right for people to prevent. If you feel a strong vibration, do not go near the sea, the mouth of a river. If you hear a report about your neighborhood**, be prepared for a tsunami.

The pre-tsunami signs are as follows:

1. The abnormal retreat or surge of sea water is lacking.

2. In the shallow sea area not far from the coast, the sea surface suddenly turns white, and a long bright wall of water appears in front of it.

3. The ship located in the shallow sea area suddenly and violently tossed up and down.

4. Suddenly, there was a loud noise from the sea, which was particularly alarming at night, and a large number of other fish and shrimp and other marine creatures appeared in the shallows; The sea water bubbles and suddenly begins to pour quickly and other anomalous phenomena.

Tsunami

Tsunamis are destructive waves of up to 700-800 kilometers per hour caused by ocean floor **, volcanic eruptions, submarine landslides or meteorological changes. Tsunamis are mainly controlled by the topography of the seabed, the geometry of the coastline and the characteristics of the waves, and the roaring waves repeat every few minutes or tens of minutes when they hold the ice wall, destroying the embankment, flooding the land, and taking life and property, which is extremely destructive.

At present, human beings can only prevent or reduce the losses caused by sudden disasters such as volcanoes and tsunamis by observing and reducing them, but they cannot prevent them from happening.

A tsunami is a natural phenomenon caused by underwater **, volcanic eruptions, underwater subsidence and landslides, and is a natural phenomenon with loud noises, and is a powerful destructive wave, the most powerful natural force on the planet.

Some strange sea creatures from the deep sea appear on the beach or on the surface of the sea.

The water bubbles and the tide suddenly recess to reveal the seabed that is not usually easy to see.

The land animals living on the seashore migrate in groups to the highlands or open fields, and suddenly there is an unusually loud noise from the sea; , the ship located in the shallow sea suddenly and violently tossed up and down.

In the shallow area of the sea, not far from the shore, the surface of the sea suddenly turned white, and a long, bright wall of water appeared in front of it.

A tsunami precursor is a precursor to a tsunami that occurs or makes landfall. Before the tsunami landfalls, there will be some very obvious macro precursor phenomena, which can be discovered by people who live, work, and travel by the sea with a little attention.

There are four common macro-precursor phenomena of tsunami landfall:

1. It is the abnormal retreat or surge of seawater;

2. It is a shallow sea area not far from the coast, the sea surface suddenly turns white, and a long bright wall of water appears in front of it;

3. It is a ship located in a shallow sea area that suddenly and violently tows up and down;

4. It was a sudden unusually loud noise from the sea, which was especially alarming at night.

In addition, a large number of fish and shrimp and other marine organisms appear in the shallows; The sea bubbles and suddenly begins to recede rapidly.

The signs before the tsunami comes: first, the abnormal retreat or surge of the sea; the second is the shallow sea not far from the coast, where the surface of the sea suddenly turns white, and a long, bright wall of water appears in front of it; the third is that the ship located in the shallow sea area suddenly and violently tossed up and down; Fourth, suddenly there was an unusually loud noise from the sea.

Tsunamis are destructive waves with speeds of up to 700-800 kilometers per hour caused by ocean floor**, volcanic eruptions, submarine landslides or weather tremors. Tsunamis are mainly controlled by the topography of the seabed, the geometry of the coastline and the characteristics of the waves, and the roaring wave ice wall in the state repeats itself every few minutes or tens of minutes, destroying the embankment, flooding the land, and taking life and property, which is extremely destructive.

The tsunami is preceded by abnormal signs such as deep-sea fish floating on the beach.

Most of them live in the water below the sail of the cave at less than 2,000 meters, their bones and muscles are not developed, their abdomen is generally as thin as wax paper but elastic, and they generally have long tentacles or luminous organs after visual degradation.

Due to the huge difference between the deep-sea environment and the water surface, deep-sea fish will never swim to the surface on their own, and can only be swept up to the shallow sea by huge undercurrents of abnormal ocean activity such as tsunamis. Once suddenly in the shallow sea or beach, deep-sea fish will develop obvious features such as ruptured internal blood vessels, stomach upside out, and protruding eyes outside the orbit, and die quickly.

Therefore, the presence of deep-sea fish on the surface of the sea is a predictor of abnormal marine activity such as tsunamis, which can help people avoid disasters.