1945 65438+On February 5th, the US19 Flying Team mysteriously disappeared during training. At that time, the scheduled flight plan was a triangle, so people later extended the Atlantic Ocean on the southeast coast of the United States from Bermuda in the north to Miami in the south of Florida, then passed through the Bahamas, crossed Puerto Rico, reached San Juan near the 40 west longitude line, and then returned to Bermuda.
The area formed is called "Devil's Triangle" in Bermuda Triangle. Hundreds of ships and planes crashed in this area, and thousands of people died here. From 1880 to 1976, there were about 158 disappearances, most of which occurred in the 30 years since 1949. 97 people are missing, and at least 2000 people are killed or missing here.
It is mainly located in an area called "the sargasso sea" in the western Atlantic Ocean, which is a wide water area between 20-40 north latitude and 35-75 west longitude. There is a world-famous Mexican warm current, which flows through120-190km day and night, and there are many whirlpools, typhoons and tornadoes. Not only that, the water depth here is 4000-5000 meters, and there is the Puerto Rico Trench, which is more than 7000 meters deep and the deepest is 92 18 meters.
2. American Black Storm
On Sunday, April 1935, after a short period of sunny weather, at two or three o'clock in the afternoon, a dusty "dark cloud" appeared in the Great Plains of the southern United States and rolled rapidly. In an instant, it was dark, and all the cars on the great plains turned off. Cities swept by sandstorms can only rely on electric lighting, but they can't find their homes a few meters away from home. People look for hiding places in the dark, fearing that they will suffocate.
This storm was the most influential and violent storm in1930s, so April of 14 was also called "Black Sunday". Around "Black Sunday", thousands of sandstorms occurred in the great plains of the southern United States in the11930 s, which affected more than 27 States in the United States and became a huge ecological disaster.
3. "Fog Disaster" in London
1952 65438+On the morning of February 3, the London Meteorological Observatory reported that a cold front would pass by at night, with a noon temperature of 6 degrees Celsius and a relative humidity of about 70%. Under the sunshine, the British Isles are particularly warm and genial; The north wind blows under the Buddha, which makes people feel relaxed and happy. At this time, fluffy cumulus clouds appear from time to time in the sky, making the blue sky more spectacular and beautiful.
On this day, the wind from the North Sea blew all over England, blowing clouds of smoke from the chimneys of factories and urban residents in central England to the outside of the cloud, so the air became extraordinarily fresh and clean, giving people a comfortable feeling. At night, London is on the southeast edge of a huge high-pressure cyclone, and the strong north wind blows clockwise around this anticyclone.
The next day, on February 4, 65438, the cyclone center had moved to several hundred kilometers west of London and moved to the southeast along the conventional path. In the morning, the wind speed gradually decreases, and clouds almost cover the whole sky. At noon, dark clouds covered all the sun, and the sky over London was overcast. The thermometer at the Meteorological Observatory showed 3.3 degrees Celsius, and the relative humidity rose to 82%.
4. Tangshan earthquake
1the earthquake that occurred on July 28, 976, the death toll was second only to Haiyuan earthquake in the world in the 20th century. Although the earthquake lasted only 23 seconds, it caused more than 240,000 deaths and160,000 people were seriously injured. 1July 28th, 976, at 3: 42: 53.8, it was called the Tangshan earthquake that shocked the world.
An earthquake measuring 7.8 on the Richter scale (7.5) occurred in Fengnan area, Tangshan, Hebei Province, China (east longitude 1 1 2 km, north latitude 39.6). The epicenter intensity was11degree, the focal depth was 12 km, and the earthquake lasted about 23 seconds. The earthquake killed 242,769 people and seriously injured164,000 people, ranking second in the world earthquake history in the 20th century, second only to the Haiyuan earthquake.
5 19 Peruvian avalanche
Avalanches, caused by earthquakes, are by far the biggest and most tragic avalanche disasters in the world. According to the statistics of relevant departments, the death toll from the earthquake is about 6.5438+0.2 million, and more than 20,000 people died from avalanches. The earthquake triggered mudslides, causing about 20,000 deaths, with a total death toll of 52,000 and economic losses of more than 500 million US dollars.
Continuous earthquakes are followed by the continuous collapse of the snow and rock on the top of the mountain, so that avalanches come again and again, and the white ocean washes away the "snow basin" at the foot of the mountain, so the mushroom cloud composed of flying snow rises from the basin again and again and falls again and again.
With the continuous avalanche, the "snow basin" under the mountain can no longer hold such a huge amount of snow, and "Xue Hai" roared away not far away. People who survived the earthquake thought it was safe. Suddenly, a wave of thunder came from far and near, from the direction of Vaskalan Mountain. Before long, the wind blew head-on, followed by a Xue Hai.
6. Extraordinary floods in Bangladesh
1987 In July, Bangladesh experienced the biggest flood in history. More than 2000 people died and 20 million people were affected. According to CNN)9's report on September 1 Sunday, it is estimated by the International Red Cross and the International Federation of Red Cross and Red Crescent Societies (IFRC) that at least 1200 people have died in Bangladesh and its surrounding areas since June this year.
More than 4,654,380,000 people were affected by heavy rains and severe floods. Now the rainstorm is still moving to the northwest of Pakistan, which is expected to cause more damage.
7. Indian plague
1September 1994 and 10/October, India suffered a deadly plague. On the second day after Shen Quan Festival, surat Hospital accepted 30 patients with similar situation. At first, the doctor didn't know that the patient was suffering from plague. However, people died one after another, and when the news of the plague epidemic in Radul near Maharashtra came, they realized that disaster was coming.
For a time, railway stations and bus stations were crowded with thousands of refugees. 300,000 surat citizens fled in all directions in India, and at the same time brought the plague and this fear to all parts of the country.
8. Toxic gases at the bottom of Lake Cameroon
On the night of August 2 1986, Lake Nios was attacked by poisonous gas at the bottom of the lake, and all the people in the village died. On the night of August 2 1986, a large amount of toxic gas suddenly spewed out from the Nyos volcanic lake in the northwest of Cameroon, Africa, resulting in the death of 1740 people. The gas emitted is mainly carbon dioxide, and the stench comes from hydrogen sulfide.
9. The Tunguska Big Bang
1On June 30th, 908, a rare big explosion came to Siberia. Its destructive power is equivalent to 500 atomic bombs? The Tunguska Big Bang occurred at 19, at 7: 00 am (0: 00 UTC) on June 30, 2008, over the Ewenki Autonomous Region of Siberia, Russia.
The explosion occurred near the Tunguska River, 800 kilometers northwest of Lake Baikal, at 60.55 degrees north latitude and 0/0/0/0/0.57 degrees east longitude. At that time, it was estimated that the explosive power was equivalent to 20 million tons of TNT explosive, and 80 million trees of 2 150 square kilometers were burned down.
10, Indonesian tsunami
On February 26th, 2004, 65438+ Indonesia was hit by a tsunami, which affected many countries and caused more than 200,000 casualties. A strong earthquake occurred in Sulawesi, Indonesia, which triggered a tsunami: At 6: 02 pm on 20 18 Beijing time, a major earthquake occurred in Sulawesi, Indonesia.
China reported magnitude 7.4, and the United States reported magnitude 7.5. The focal depth is only 10km. A video broadcast by the local media showed that the tsunami "wave wall" suspected of the Indonesian earthquake took only 30 seconds to pounce on the town from the horizon, like an avalanche, at an extremely fast speed.
Baidu Encyclopedia-Ten Natural Disasters in the 20th Century