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Immediately after the earthquake, rescue teams enter the isolated village.
Shindo 7 earthquake, first recorded in Hokkaido.
39 people died and one is missing.
NHK investigated the cause of the damage and found that new risks are spreading all over Japan.
In addition, due to the Great East Japan Earthquake, which did not occur, so-called "blackout" occurred.
It's almost dark. It's creepy.
The impact spread not only in Hokkaido but all over Japan at once.
A typhoon and heavy rain hit Japan.
What is this earthquake, which was about to hit Japan, hitting?
An emergency report from the site.
An earthquake in Atsuma, Hokkaido
Four hours after the earthquake occurred,
the NHK investigation team entered Atsuma Town, which recorded a depth of seven meters.
The up and down roads are completely blocked.
The back hills of the village are also flooded with sewage.
The collapsed hills swallowed up houses and turned a small town of 4,000 people into one.
There's a snake in here, right?
In the intense shaking, there was a woman who held her life.
She is Emiko Nakajima, 85 years old.
Oh, I was surprised when I saw what was inside the house.
Did it all fall at once?
That's right.
When the earthquake occurred, Nakajima-san was sleeping in her bedroom.
It was under this.
The bedside table has collapsed.
It hit this masked man, didn't it?
Where is it?
Here.
It's swollen.
She immediately put out her arm and covered her head.
It was amazing. At first, it was pretty big when I turned it over.
I couldn't walk anymore.
I've never had anything like this with myself.
The day after the earthquake.
Self-defense forces, police, and fire department continued their search with more than 2,000 people.
This is an evacuation center provided by a local elementary school.
Residents prayed for the safety of their families and friends.
"Are your parents waiting for you?" "Yes, we are waiting for help."
"Can you stay at home?" "As soon as possible."
When the earthquake struck, Mr. Nakata and his sister Ms. Kaori were sleeping on the second floor of their house.
It is said that a torrent of sewage flowed into the first floor where their parents were staying.
This was their house.
This is the room I was staying in.
The second floor was like the first floor.
I kicked the window frame and removed the window and came out.
They desperately tried to get out of the house.
What they saw at that moment was...
"The roof is broken." "I don't know what its original shape was like."
The house is certainly 10 meters apart, but I don't know if it's really 10 meters apart or if it's 20 meters apart from the roof.
I don't know where the first floor is and I don't know where to call out.
I don't know where to call out.
Parents who don't know where to call out.
Every time news of the rescue site flows out, we look at the TV.
All we could do was pray for safety.
From a distance, there was a man staring at the disaster site.
42-year-old Shingo Nakamura. His parents were found dead.
He doesn't know about his grandmother's secret weapon, which was lying on the first floor of the same house.
I can't believe it. I really can't believe it.
I told my father and mother, "I hope dreams come true."
I want to believe that this earthquake itself is a dream.
I told them, "I hope dreams come true."
I hope this situation comes to an end.
That's all.
The road is flooded.
The roadside car has escaped and turned brown.
50 kilometers from Atsuma.
In Sapporo city of Kiyotaku, where we observed our hometown,
we were facing a different situation.
People and cars are buried in the mud and can't move anymore.
The road is flooded and houses are tilted.
The complete residential area is attacked by muddy water and underground water.
- How far was it? - Up to here.
- Up to here? - Of course.
- It's flooded? - That's right. Everything is tilted.
- Look at the current flow. - Yes.
- It's terrible. - It's a river now.
- It's terrible. - This is a normal road.
As soon as the earthquake occurred, this man, who felt the danger of his life, tried to get out of the car to evacuate.
- What happened to your car? - I got out of the car just before the road fell or not.
- When I looked back, there was no road. - What?
- I got out of the car in 15 or 20 minutes. - What?
- Really? - There was no road.
Some people have their houses exposed to the danger of collapse due to liquidation.
This is Mr. Ishida.
Mr. Ishida's house has a loose ground and is tilted diagonally.
When I approached the house, it was covered with blown out soil.
- The house is... - The house is...
- Over there... - The house?
Yes, in the back.
What can I say? It's so damaged that I can't stay in it.
It is said that there is no way of looking back at life.
From now on, I can't think about what happened earlier for the time being.
For now, it's a little impossible for me to live in a house.
I don't know what to do.
Unknown people are brought in one after another.
This is Shingo Nakamura, who lost his parents and didn't know about his grandmother's secret.
In the afternoon, Kimiko's grandmother was found dead.
All three of them died, but we all found them. Thank you very much.
In the evacuation center, Takumi Nakata, who continued to wait for his parents' rescue who were buried on the first floor of his house.
Prayers did not reach.
Nakata's parents, Mamoru and Yasuko, were confirmed dead.
- END-
A violent earthquake struck Hokkaido. Four days later, it was nightfall.
The familiar nature and familiar residential areas have changed completely.
The shock is indescribable.
- I am also from Hokkaido, but I was really surprised and terrified. - Yes, I was surprised and worried.
- And in July, in western Japan, there were 230 dead and missing people.
- And just the other day, in Taifu 21, Kansai Airport collapsed yesterday.
- Now, an unexpected disaster continues.
- In such a situation, an earthquake observing the shaking of 7 degrees Celsius occurred for the first time in Hokkaido.
- This time too, high-range landslides and large power cuts have caused damage.
- Why do such disasters occur frequently?
- Has the disaster that attacks us entered a new stage?
- As we continue our coverage, new risks have been revealed, such as heavy rain and earthquakes that fall due to abnormal weather conditions.
Yesterday, this is a video of a new landslide site that was filmed.
Only the mountains remain and collapse in all directions.
What caused such a large-scale landslide?
Mr. Takashi Furumura of Tokyo University.
This time, he found out that there are major characteristics in the shaking caused by the landslide.
The waveform of the earthquake observed in the area near the mountain.
It is a characteristic shaking called "very short cycle" in which a violent vibration attacks more than twice in one second.
Moreover, the shaking continued for nearly 20 seconds in a row.
You can see that a very short cycle of very hard, fine- cut shaking lasted for 10 seconds, 20 seconds, and longer.
It is likely that people could not stand up to such strong shaking as in the last century.
Moreover, if it continues for a long time, it can cause natural disasters, such as a cliff collapse.
The thick pine tree area where the damage was serious was affected by a fine-cut and violent shaking that moved the entire mountain slope.
In addition, we have seen another factor that has expanded the damage from the geological survey carried out in the area.
Mr. Satoshi Ishimaru, who specializes in soil and car accidents in Hokkaido.
Yesterday, for the first time, I entered an area that had not been investigated before.
If you look closely at the slope, you will see different colors of soil in the collapsed areas.
The orange-colored ones are called "four-colored volcanoes", but since there is a lot of iron in them, they have a red color.
These are quite characteristic volcanoes.
There are multiple volcanoes around here, such as Mr. Tarumae.
They have been erupting repeatedly for a long time and have caused a large number of volcanoes to collapse one after another.
This time, it was a layer of volcanoes like this that was covering the collapsed mountain slopes.
Mr. Ishimaru noticed another factor that would expand the volcanic eruption.
It was found in the volcanic ash.
Volcanic ash erupts and becomes clay, and clay particles are formed.
Among them, there is something called "haroi ash," and it is classified as a boundary between that and volcanic ash.
"Haroi ash" is a clay particle with volcanic ash covering the surface.
When water is added, it becomes slimy.
In Yamahada, where Mr. Ishimaru investigated, volcanic ash was placed on top of this "haroi ash" layer.
When it rains and water seeps into "haroi ash," the surface becomes slippery.
Mr. Ishimaru thinks that there was an earthquake there and volcanic ash fell at once.
In the past month, it has rained more than usual in Hokkaido alone, and the precipitation around Atsuma-cho has increased by 35%.
Ishimaru thinks that the rain before the earthquake may have expanded the volcanic ash disaster.
Ishimaru thinks that there wasn't much water in the high water level area, but water was still kept in the soil.
Volcanic ash itself seems to have been shaken by an earthquake and broken, but water was still born in it, so those who ride on it are very fast.
If there is a house or road just below the cliff, it is very difficult to escape from there because it is very fast.
HALLOWEEN SITE, which has the fear of expanding the volcanic ash disaster caused by a major earthquake.
In Japan, volcanic ash is hotly deposited in areas other than Hokkaido.
In such places, there may be a HALLOWEEN SITE underground.
Takehiko Suzuki of Shuto University Tokyo has been paying attention to dangerous geological layers, including HALLOWEEN SITES.
Takehiko Suzuki of Shuto University Tokyo
This is where volcanic ash is deposited, which is widely distributed in the southern kanto area.
It is very similar to the site where the volcano fell this time in Hokkaido.
Takehiko Suzuki of Shuto University Tokyo
This is where volcanic ash from Mt. Fuji and Hakone's mountains is densely deposited.
There was a geological layer including HALLOWEEN SITES.
Takehiko Suzuki of Shuto University Tokyo
A new risk of rain and earthquake combined disasters lurking all over Japan.
Experts who simulate global warming say that we need to be even more cautious in the future.
A severe weather or heavy rain in a short period of time can cause global warming.
Before an earthquake occurs, it may rain, the ground may be wet, and it may be easy for a disaster to occur.
I think we should assume that it will be higher than before.
Breaking news about bad weather. Mother Nature Angry Caught on Camera top 5 and top 10.
First of all, I would like to ask reporter Fujishima, who is in charge of disaster management at the Social Department.
This time, such a tremor occurred in the inland part of Ibris region.
I think that at least the locals were surprised, but it is not always unexpected.
That's right. First of all, I will summarize the damage caused by the earthquake this time. Please take a look at this.
Large-scale landslides in places close to the source of earthquake, liquidation in distant places, and blackouts in Hokkaido also occurred.
Next, please take a look at this map. This red part is the plate boundary. The white line is the main rubble layer. The yellow triangle also shows rubble.
Such places have been warned because of their high risk of large earthquakes.
And here is the source of earthquake this time. This is where the X mark is.
Certainly, it is away from the plate boundary and also away from the main rubble layer, so some people may have felt that an earthquake occurred in an unexpected place,
but in fact, it is not uncommon for a large earthquake to occur in such a place.
In all countries, there have been at least five or more earthquakes this year, but none of them have occurred in the plate boundary or in the main rubble layer.
In other words, I think it is important to recognize once again that it is not strange for an earthquake to occur anywhere in Japan.
In addition, if you turn around the fact that you do not have such a large earthquake in the area you live in, there is a risk of a major earthquake to occur in the future.
And we have an earthquake disaster expert with us. We will have Ikeha-san talk about this as well.
Ikeha-san, how did you see the characteristics of this earthquake disaster?
As a characteristic of this earthquake disaster, I would like to give you a pattern of landslide collapse.
One of them is this layer of ice.
Yes, this is a picture of Atsuma-cho.
As the landslide collapses, along with the landslide,
you can see the pattern of landslides on the leftmost slope of the slope.
Yes, it is here on the screen.
Yes, it accumulates at the foot of the slope. This is one of the patterns.
Another one is often seen on the slope of the V-shaped valley terrain.
This is the slope on the right side of the picture.
Yes, it is on the right side.
As you can see now, the collapsed landslide has become one with the landslide and has flowed down a little more.
It has crossed the road and has come quite a distance.
It is thought that it has flowed down due to the influence of the terrain and the water that existed underground.
The landslide has not only hit the houses along the mountainside, but also quite a distance away.
Therefore, it is thought that the large damage caused by the landslide had an impact.
As it has become a valley, it was easier for water to accumulate.
Yes, it is easier for water to accumulate.
This time, it was pointed out that there is a risk of a combined disaster due to the landslide and rain.
What do you think about this point?
In that sense, first of all, it was in an area where the earth's temperature was fragile and there was rain in advance.
Then a large landslide occurred there.
This is what happened as a result of the landslide.
However, when you think about it, it is quite common in Japan to have landslides and landslides in various areas.
Rain falls all over Japan and landslides occur everywhere in Japan, as we mentioned earlier.
If you think about it, this is a phenomenon that occurs everywhere in Japan.
In that sense, I think that rain and earthquakes combined disasters should be taken enough care of as risks in the future.
And the impact of this earthquake has also greatly reduced important infrastructure and electricity.
A large-scale blackout far beyond our imagination, blackout.
Just before the earthquake occurred, these four red-lit power plants supplied electricity all over Hokkaido.
But this time, with the earthquake occurring, more than half of the power plants that were generating electricity automatically stopped.
And as a result of this delay, the other three power plants also stopped one after another.
As a result, a blackout occurred all over Hokkaido.
Two hours before the earthquake occurred, it is one o'clock in the morning in Hokkaido, which was filmed from a satellite.
At three thirty, when the earthquake occurred...
A large-scale blackout occurred in Hokkaido, where all power plants in Hokkaido lost electricity.
Even in Hakodate City, 140 km away from the source of the earthquake...
In the city's disaster-hit hospitals, chaos continued due to blackouts.
Using self-generated electricity, minimal medical care was able to continue,
but new foreign reception was stopped.
Buildings are built, and only electricity is used.
It's a special kind of special.
That's not all of it.
Seventeen hours after the blackout,
electricity was back on, but faced with new challenges.
A request for patients to be admitted from nearby hospitals that were still out of service.
Emergency use is especially important for patients who need electricity.
In a hurry, they prepared beds for 35 people and decided to respond.
There are a lot of clinics that can't be admitted,
and if all of them shut down,
it's really hard to decide where to spread out.
I thought I'd go all over the country,
but when I heard about it, I didn't like it.
If you're a healthy person,
it's okay to stay away,
but if you're too far away, you'll wake up one day,
and that makes you feel uneasy.
After the earthquake, in Sapporo city, people were surrounded by candles and waiting for the fire to go out.
While there is no electricity, some people are worried about their lives at home.
"Yes, excuse me." "Yes, thank you." "Hello, excuse me, thank you very much."
Those who are handing out self-generated electricity are organizations that support children's home medical care.
The device connected to it is a medical device that measures myocarditis and blood oxygen levels.
Tami Miyamoto is taking care of her eight-year-old son, Yui, who has chronic constipation, at home.
A short rest every few hours. An artificial respirator is a must at night.
I don't know if he's breathing or crying. I can't tell because I can't speak.
I judge by looking at the numbers.
Right after the power goes out, she can't charge her cell phone and feels anxious every day.
I thought it would be hard to live without electricity, but I didn't know it would be this hard without it.
A large-scale power outage across Hokkaido also caused serious damage to logistics.
In the same large-scale transportation company, they had to stop almost all of their 600 trucks immediately after the quake.
In addition to the power outage, they couldn't charge their voice recorders because of the power outage.
The shipment resumed yesterday, but there were mountains of luggage that couldn't be carried all the way, and they couldn't accept new shipments.
If we don't stop shipping, more and more products will overlap and we won't be able to get public transport.
This is the biggest apology we can make to our customers.
The strike caused by the stoppage of logistics is also for the producers.
In this farm, yesterday, three days after the quake, shipping companies were also refused to ship goods.
Corn, which has reached its harvest season, cannot be shipped and is starting to hurt.
It's empty. We raised it up to this point, and we have no choice but to fix it.
It's a problem that can't be helped, so it's the first time I've felt that it's affected this much.
The impact is also on the largest Sapporo central wholesale market in Japan.
Most of the goods were shipped before the quake struck.
The impact of the quake also hit the city of Sapporo.
Even after power has been restored, many stores are unable to operate normally.
Foreign tourists flocked to ramen shops that reopened their business only with the ingredients in the store.
Since there is no food, there is no water either.
Is there a way of providing it by using ingredients that can be used as much as possible?
In as much as possible?
In as much as possible.
Is there no other material?
There is not.
In addition, it has been seen that there was a risk of a large-scale outage not only in Hokkaido but also nationwide.
This is the largest data center in Japan in Hokkaido.
Due to this outage, some of the data supply had temporarily stopped.
It shows how much electricity is coming in from Hokkaido Electric.
It is currently at 0 volts and 0 amperes.
Due to this outage, some of the data supply had temporarily stopped.
This data center handles huge amounts of data for 400,000 companies and tourists nationwide.
If all of the servers went down, the impact would spread to a wide range of places in Japan.
Originally, this company set up a huge server in Hokkaido for sale of things with few disasters.
Yesterday afternoon, we returned to normal power supply, but we are still cautious in case of a power outage again.
When a security check site or a government system is shut down,
it is no doubt that things that cannot be used suddenly in life will be exported.
I know.
Indeed, not only in life but also in various places, the situation of connection continued.
Now, I would like to ask Mr. Shigeta of the Science and Culture Department, who was interviewed.
Mr. Shigeta, this time, it was one power plant that stopped urgently due to an earthquake.
Why did it become a blackout?
First of all, there was a distorted state in the background that one power plant could not provide half of the power demand.
And the frequency was holding the key to the blackout.
If the frequency is distorted, the turbines of other power plants will break.
Therefore, it is extremely important to keep the frequency constant.
If the frequency is distorted even around us, washing machines, microwave ovens, motorized appliances and precision machines may break.
The balance of power generation and power consumption is essential to keep this frequency constant.
This is being paid attention to now.
That's right.
First of all, in eastern Japan, the frequency is based on 50 Hz.
If power generation and power consumption are not kept in the same way, the frequency will be distorted.
Normally, the frequency is 48.5 to 50.5.
The power plant is always monitoring the frequency so that it does not deviate from this interval.
Then, when the situation is the same as this time when power generation is halved, we tested what would happen.
This is the only laboratory in Japan that can simulate the power system using generators.
When power generation is suddenly halved, we tested what would happen to the frequency.
Four, three, two, one, zero.
That's it.
The estimated power supply in Hokkaido is up to 6 percent of the power supply.
At that time, the frequency drop is suppressed by about 49 hertz and power generation can continue.
However, if power is suddenly lost by half, power plant will be forced to stop in just one second.
I've never seen anything like this before.
I think we couldn't avoid it if we couldn't avoid it.
In a blink of an eye, the frequency of this limit has exceeded or deviated.
Yes, we found it from the experiment.
It is seen from this experiment that other generators were driven to automatic shutdown in order to avoid failure of equipment due to rapid decrease in frequency.
It can be said that there was not enough effect of devices that forcibly reduce consumption by power companies.
This distorted state of concentrating on one generator caused fatal situation.
It is required to verify it in the future.
Thank you for coming to Masakazu Kato of Tokyo Electric University, who is familiar with power systems.
Thank you for having me.
Mr. Kato, how did you feel about this blackout?
Mechanisms and scenarios for blackouts have been considered in the past.
As you know, power companies have taken various measures to avoid blackouts due to their significant impact.
In that sense, I am very surprised that a large- scale blackout occurred in reality.
Mr. Kato, you were surprised, too.
For example, during the Great East Japan Earthquake, how did you feel about that disaster?
During the Great East Japan Earthquake, a large number of power supplies were switched off for tsunami reasons.
At that time, a large number of power supplies were switched off to maintain frequency.
As a result of that, all power systems were able to avoid blackouts.
However, power supplies were forced to be switched off.
Such adjustments were made.
During the Great East Japan Earthquake, power supplies were barely switched off.
That's right.
As you mentioned earlier, there is a possibility of an earthquake anywhere in Japan.
Is there a risk of a blackout in other areas as well?
Yes. For example, if you think of Shito Prefecture,
there is a power outage in Chiba Prefecture, which is the world's largest power outage,
and when it is driving at full and maximum output, as in this case, it has stopped.
If you think about it like that, a small-scale blackout may occur, but it is likely that there will be no large-scale blackout.
However, if, for example, a large-scale earthquake occurs in Tokyo Bay and the power outage stops,
not only one place, but all power sources in Tokyo Bay may stop operating.
Even the surrounding power plants may stop operating.
If such a large-scale supply is lost, I don't think there is a possibility of a blackout.
In addition, recently, there has been a tropical tsunami earthquake, and when such an earthquake occurs,
most power plants are built near the coast,
but considering the possibility of those power sources stopping operating on a large scale due to the tsunami that occurred due to the earthquake,
I can't say for sure that there won't be a blackout.
In that sense, I used to think that there would never be a blackout until now,
but I think we have to be aware of such things to some extent due to large-scale disasters.
That's right. This time, we made a right decision.
Thank you very much.
Mr. Shigeta, there is information that electricity in Hokkaido is recovering, but it is still a situation that requires attention, isn't it?
That's right. As of now, recovery has progressed and power outages have almost been resolved.
However, since power generation is not enough now, it is extremely difficult if power cuts are not made.
In this situation, there is also the risk of falling back to large-scale power cuts when a large earthquake occurs.
The government is also calling for power cuts in order to avoid planned power cuts.
It is difficult for those who are being supported, but measures are needed to avoid falling back to the worst situation.
Although the situation is still improving, it cannot be said that it is the original state.
The impact continues.
In addition, there is a fear of landslides and other things, and even now, more than 2,500 people are living in evacuation.
We will broadcast the situation in the area from Atsuma Town.
Today in Atsuma Town, it rained harder than usual.
At this time of day, it is not raining.
However, the temperature has dropped. It is now about 14 degrees Celsius.
One of the evacuation centers is the General Welfare Center.
At this time of day, more than 600 people are evacuating.
A woman in her 60s has been spending her night here since the earthquake.
She was worried about a second wave due to today's rain.
Also, a 70-year-old man said, "I didn't know there would be such a big earthquake in Hokkaido while I was alive."
In Atsuma Town, electricity has been restored in most areas.
Some people have returned home.
On the other hand, waterways are not looking like they will be restored.
The desire to regain everyday life is growing stronger.
Yes. In Atsuma Town, it rained.
I'm sure you were worried about it.
Of course, where the landslide occurred, it didn't happen.
But after this, there is a risk of another disaster.
We can't tell you to be careful anymore.
Please be careful for a while and stay alert.
Today, from various angles, we have seen the new risk of the earthquake in Hokkaido.
Mr. Kamiya, unlike before, it is an era in which we need to think about the risks of various disasters coalescing.
What should we think about as we live our lives?
I think there are three lessons from this disaster in Hokkaido.
The first one is about fragile land quality.
It happens all over the country.
Whether it rains or not, it happens all over the country.
Recently, it has been raining a lot.
Earthquakes, especially direct hits, are happening all over the country.
If you think about it, these conditions apply everywhere in the country.
In other words, this disaster is not about others.
The first thing you need to know is that it happens everywhere in the country.
The second thing is that it happened in the middle of the night.
It happened at 3 a.m.
The third thing is that since it is a direct hit, the emergency earthquake alert does not come in time.
The second thing is that such an alarm was a disaster that was hard to come up with in advance.
When you think about it like that, you may think about what you should do.
But I think it was a disaster that you had to think about protecting your own life.
For example, you don't build a house in a dangerous place.
And if you do, you may already have one.
In such cases, you may sleep on the second floor or live outside.
Or you may live far away from the cliff or the slope.
Or you may look for a safe place near your house in advance.
And if necessary, you may evacuate there.
You should think about these things.
And you should think about it with your family.
I think this is a very important era.
That's right.
We should know about disasters and act on our own.
Thank you for your time today.
It's time for us and those around us to look back on how we can protect ourselves and those around us when the time comes.