In the early morning of January 16, 2022, presumably the news of the tsunami warning occupied most of the circle of friends! Due to the chain effect caused by the eruption of the undersea volcano in Tonga, the Japan Meteorological Agency issued a continuous tsunami warning in the early morning of the 16th, which is also the first time in 5 years that Japan has issued a tsunami warning.
What is a tsunami?
When an earthquake occurs, the ground near the epicenter is raised or pressed down, which is what we usually call an earthquake. And when the earthquake does not occur on the mainland but in the sea, when the source is in the shallow layer below the seabed, the upper and lower amplitude of the surface will also occur, and at this time it will not only move the surface, but also the sea level will produce a huge float, and this floating accumulation is the "tsunami" we hear.
Friends who can swim will know that as long as the fluctuations in the water are relatively large, they will set off gentle waves, and it will expand more than ten times or even hundreds of times, which is a tsunami.
What are the risks of a tsunami?
In the simplest terms, wherever the great tsunami passes, the possibility of being directly razed to the ground is very high. A tsunami of 3 meters can destroy wooden houses, more than 8 meters is enough to destroy ordinary stone houses, and a huge tsunami of 16 meters can easily tear down reinforced concrete houses. Even for a tsunami of "only" thirty centimeters, the flow of water is fast enough to roll an adult down or even directly into the seawater.
(*Great tsunami hypothetical image)
The tsunami caused by the Great East Japan Earthquake that shocked the world in 2011 was 40 meters high, equivalent to the height of the 13-15 floors of a general building, so you must be cautious when encountering a tsunami warning.
What is a tsunami alarm?
A tsunami warning (Japanese: Tsuba Warning) is a tsunami warning or warning issued by the Japan Meteorological Agency when it predicts that a large tsunami will be triggered by an earthquake. Basically, near-Earth tsunamis that originate up to 600 kilometers off the coast of Japan will issue warnings, warning reports, and forecasts.
The Japan Meteorological Agency is working to issue forecasts of when and at the altitude of the tsunami to reach coastal areas within 3 minutes of the earthquake (when the earthquake occurred off the coast of Japan). As a person who was expected to be affected by the disaster, this is the golden life-saving time.
Great tsunami warning
• Immediate tsunami warning
It is expected that a tsunami with a height of more than 3 meters will occur, and at this time, no matter what floor you live on, quickly evacuate to the far coast area, or the locally identified tsunami evacuation site (at an altitude), at this time, if you think that you live on the high floor of the マンション high floor, so do not worry about the big problem, the probability of direct destruction from the bottom is still very large.
Tsunami warning
• Immediate tsunami warning
It is estimated that the height of the tsunami is between 1 and 3 meters, and the coastal area and the coastal area should quickly move away from the low-lying, near-horizon area, to the nearby hill or high-rise buildings. Like this volcanic eruption in Tonga, Japan issued this tsunami warning!
Tsunami forecasting
• Immediate tsunami warning
If you are under 1 meter away from the coastline, do not stay at the seaside and quickly evacuate the danger zone. The western part of the Tokyo area is adjacent to the mountains, and the altitude is higher, but the coastal areas along the river are relatively low, especially the minato area Rinkai, Shinagawa Ward Rinkai, Ota Ward, Koto Ward, Edogawa District and other eastern areas are low altitude, which is the expected place of disaster, so do not think that there will be no tsunami threat in Tokyo.
How to deal with the tsunami?
To be honest, there is nothing special to prepare, but the thing that must be done is to remember the tsunami shelter near your residence, especially the buildings that are earthquake-resistant and anti-disaster walls will be posted with the sign of "Tsuba Evacuation", once the high warning occurs, the first time is to run to these places, do not go to the beach to see the liveliness!
Finally, I would like to remind everyone that disaster reminders on various mobile phones in Japan are turned on by default, although the alarm is annoying, but do not turn off the mobile phone alarm, increase vigilance and be prepared for everything is what we need to do! Remember to transfer it to your friends in Japan
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