When a tsunami comes, is it safe on land or in the water?

This depends on the distance between the land and the tsunami, and if the distance is long, of course, the land is safer. If it's closer, it's safer in the water.

It is relatively safe in the water, because the impact of the tsunami is very large, and it is easy to cause greater damage to the land.

It is not very safe on land or in the water, and when a tsunami hits, objects on land will be shattered by the impact of the tsunami crest many times. The situation in the water is also very bad, and the silt and bacteria that have been deposited in the water will burst out with the tsunami, which is also very threatening to human life.

It is not safe to hide in the sea, because the situation in the sea is also dangerous when a tsunami occurs.

There is certainly no guarantee of safety, because the tsunami is actually caused by an undersea storm, and if you take shelter in the sea, you will be hurt by the storm.

I don't think it's safe, because the sea has a lot of buoyancy in it, and it can even kill a person, so it's better to run in the event of a tsunami.

The seabed can cause a tsunami, but not every time the seabed can cause a tsunami. Tsunamis are typically triggered by storm surges, volcanic eruptions, underwater landslides, and the ocean floor**. Among them, the seabed** is the main cause of tsunamis, and historical records show that the extremely large tsunamis are basically caused by the seabed**.

Most of the ocean floor** occurs in the marginal zone of the Pacific Ocean, known as the "Ayan Zone". After the occurrence of seabed **, cracks appear in the marginal zone. At this time, part of the seabed rises or falls suddenly, and the sea water will be severely turbulent, creating "circular ripples" like throwing a stone into the water, thus causing a tsunami.

In addition, the generation of tsunami will also be affected by the seabed source fault, the water depth conditions of the epicenter area, the magnitude, the depth of the source and other conditions. For example, tsunamis are more likely to occur if the epicenter is located in deep water than in shallow water. A tsunami is not produced when the source fault behaves as a dislocation, whereas a tsunami can occur if the source fault behaves as a dip.

However, the bottom of the sea** does not necessarily cause a tsunami. Statistics provided by the China ** Bureau show that only about 100 of the 10,000 seabed tectonics** caused tsunamis. Some experts believe that the magnitude of the tsunami is generally above the Richter scale, and the depth of the epicenter is less than 25 kilometers.

But even a strong ** does not necessarily lead to a tsunami. For example, in 2005, a strong ** event occurred in the waters near the Indonesian island of Sumatra, which did not cause a tsunami. Experts explained that this is because the epicenter of the ** is relatively deep, so although the magnitude of the earthquake is very strong, the amplitude of the dislocation up and down the seabed surface may also be relatively small, so no tsunami was formed.

In addition to the magnitude of the earthquake, some experts also said that the occurrence of the tsunami is also related to global climate change.

It doesn't have to be a tsunami.

How to crack the hazards caused by the tsunami:

1. Establish an early warning system.

This system uses a network to determine where it occurs, and then combines it with a deep-sea submersible to determine whether a tsunami has been generated. Once identified, use the timing of tsunami transmission to sound the alarm and prepare areas that may be affected.

2. Tree planting. Vegetation in coastal areas, such as mangroves, can also mitigate tsunami hazards.

Therefore, the protection of the ecological environment in coastal areas, in addition to the ecological benefits, is also very helpful for disaster reduction. Some countries and regions also use the method of building high walls to resist tsunamis, but because of the cost, this wall cannot be built too high, and can only block small tsunamis.

Three: Avoid in time.

Tsunamis are waves, and sometimes, troughs are transmitted to the shore first.

At this time, the sea water suddenly retreats rapidly. If you suddenly find this at the beach, be sure to take shelter immediately on higher ground with a solid foundation. Of course, if the crest of the wave is passed to the shore first, there is no time to escape.

Tsunamis are huge waves caused by geological changes such as the seabed**, volcanic eruptions, large landslides, and large collapses. Due to the small compressibility of seawater, when subjected to the action of ** energy, the water body can only transfer the energy in the form of fluctuations of the same scale. When a tsunami wave enters the shallow sea of the continental shelf, the wave height increases suddenly due to the sharp change in depth, and a tsunami with a wave height of more than 10-20 meters may occur.

In coastal areas, tsunami waves can instantaneously intrude into farmland villages and then quickly recede. Repeating this many times will cause huge losses to life and property.

The bottom of the sea** does not necessarily cause a tsunami. **Tsunami disaster must meet three conditions: (1) the water depth at the epicenter reaches several kilometers, (2) or more**, and (3) the gentle coastal terrain.

Able to accurately ** tsunamis. Because the propagation speed of the tsunami is about 800 kilometers per hour, it often takes several hours, or even longer, from the occurrence of the tsunami to the arrival of the tsunami on the coast, while it generally only takes half an hour to measure the formation of the tsunami by using advanced ocean-going instruments or using the first network. In other words, the early warning of a tsunami is a clever use of the time difference between the propagation speed of electromagnetic waves and mechanical waves, so as to achieve early warning.

When ** occurs on the seabed, the power of the seismic wave causes the sea water to rise and fall violently, forming a strong force.

First of all, the magnitude of the earthquake is large. If the magnitude of the earthquake is small, it is not enough to stimulate the fluctuation of the entire water body from the sea surface to the bottom of the sea; Secondly, the mechanism. When the seabed ** mechanism is dip-slip **, that is, the fault is dislocated up and down, which is easy to trigger the tsunami; Thirdly, the ** source of the seabed is shallow, which is easy to excite the tsunami and the source rupture process.

When ** occurs in the deep part of the seabed, the tsunami only propagates on the open sea, and the wave fluctuations are not large, and it is generally not lethal, but when it is forced into the coast, the wave rises suddenly, forming a huge destructive force.

The movement of the earth's crust and the vibration of the earth are the most intuitive and common manifestations. Tsunamis occurred due to (1) vertical displacement of the seabed during **, and (2) collapse of the trench slope.

No, the underwater tremor is also very strong, and it is difficult for the human body to bear.

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.

Tsunamis can be divided into three categories according to their causes: tsunamis, volcanic tsunamis, and landslide tsunamis. A tsunami is a strong disturbance of seawater caused by a sharp rise and fall in the topography of the seabed. There are two forms of mechanism: "descending" tsunamis and "uplifting" tsunamis.

Descending type "tsunami": some tectonic ** causes a large area of sharp decline in the submarine crust, the sea water first swells to the space of sudden staggered subsidence, and there is a large-scale accumulation of seawater above it, when the inrushing seawater encounters resistance on the seabed, it turns back to the sea surface to produce compression waves, forming long waves and large waves, and propagating and spreading around, this descending type of tsunami formed by the movement of the submarine crust is the first to show abnormal low tide phenomenon on the coast. The 1960 Chile** tsunami was of this type.

Uplift "Tsunami": Some tectonic structures ** cause a large-scale sharp rise of the seafloor crust, and the seawater also rises with the uplift area, and there is a large-scale accumulation of seawater above the uplift area, under the action of gravity, the seawater must maintain an equipotential surface to achieve relative equilibrium, so the seawater spreads from the wave source area to the surroundings, forming a turbulent wave. The tsunami waves formed by the movement of the seafloor crust in this uplifted type first appear as an abnormal high tide phenomenon on the coast.

On May 26, 1983, the tsunami caused by the Sea of Central Japan 7 7** was of this type.

Tsunamis are also unsafe underwater when they come, because tsunamis are not a little bit of water activity on the surface, but a certain depth of water that can be involved below the surface. The ocean has a wave datum, and there is no wave activity below the datum, but the seawater activity will also drive the seawater in this part to the sea, and the current below the wave base is also strong during a tsunami. Besides, staying underwater all the time is not an option.

Safe, but the premise is that you have to be prepared to accept a pair of swimming shoes, 2 bottles of oxygen tanks 20 minutes before the tsunami comes, prepare a full stomach in advance, and it is best to leave 12 minutes to go to the bottom of the sea for 180 meters to find the edge, do not move around at will, and wait for the tsunami to pass before coming out.

It is not safe, the tsunami will cause high-intensity fluctuations in the entire sea area, and the underwater dark tide will directly squeeze people.

Tsunamis are caused by the bottom of the sea**, and if you stay underwater, be careful to be sucked into the whirlpool.

Who can stay underwater for half a day or even a few days.

The cushioning effect of the water is strong, and even if something is smashed into the water, it will not have such a big impact to injure people.

Because the tsunami is caused by seawater, it will not affect us in any way if we enter the water.

Tsunamis are ultra-long waves, with waves of hundreds of kilometers long, and the amplitude is relatively small at the deep sea, at most a few meters. This amplitude is so small in proportion to the wavelength band, so the tilt at sea level is so small that it is not felt by ships at sea.

The low tide before the tsunami is like rotten, in fact, the tsunami (trough) has arrived, at this time about 1 2 hours from the arrival of the crest, sail out to sea, at the speed of 20 knots per hour of the average ship, the crest of the wave should be about 20 nautical miles away from the coast, it should be relatively safe. Diving is useless, in the nearshore zone, the tsunami energy will be converted into currents, after going ashore, the flow speed is very large, the scum leaks, and it is very dangerous to be dragged inside, it is better to climb on the roof safely.

Tsunami-prone places include the junction of tectonic plates, as well as coastal areas. Japan, for example, is at the junction of tectonic plates, and it is an island country surrounded by the sea, so there are frequent tsunamis. There are also areas with narrow coastlines that are prone to tsunamis in curved areas.

There are also few islands, and the lagoon area is also prone to tsunami.

Tsunamis are prone to occur in places like Japan because it is an island country and is close to the sea, and as the sea level rises, the waves can easily cause tsunamis and endanger the lives of people.

Tsunami prone areas include areas close to the sea, islands, and lagoon areas. Where the continental horizon is narrow and twisted, where the coastal plates meet, and where the coastal areas are relatively low, flat.

Coastal areas at the junction of plates have frequent geological activities and are prone to tsunami; **Volcanic eruptions are likely to occur in areas prone to volcanic eruptions, which indirectly affect the crust of the seabed and cause tsunamis, such as Japan.