How is an avalanche formed? Causes of avalanche formation

Generally speaking, places with high mountains and valleys, steep slopes, strong winds, and abundant precipitation are prone to avalanches, such as the Himalayas, as the world's longest and most steep mountain range, including many peaks such as Mount Everest, Shisha Bangma Peak, Zhuo Oyu Peak, Nanga Parbat Peak at the west end, Nanga Bhava Peak at the east end, etc., all of which belong to the steep terrain, rich snow, and glacier development zone. In particular, the south side is frequently adjacent to the Indian Ocean, affected by the oceanic monsoon climate, the accumulation of ice and snow is abundant, and frequent avalanches are the main supply mode for the development of glaciers, and they are also the main mountain disasters, which pose the greatest danger to mountaineering activities. Broadly speaking, avalanches can be classified into two types: natural and man-made.

Natural avalanches are mainly caused by high winds, blizzards or storms, heavy rain, heavy snow, exposure to the sun, severe cold, frost, **, etc. Sudden avalanches can occur due to the lack of experience of climbers who strayed into avalanche areas, or even sudden avalanches due to loud vibrations such as people shouting loudly on the mountains that disrupt the balance of the snowy environment. Climbers build roads and cross-cut snow profiles are more likely to cause unstable ...... of snow aboveWait a minute. According to the way of avalanche movement, it is divided into point avalanche and surface avalanche.

From the type of avalanche itself, it can be divided into dry snow avalanche and wet snow avalanche. As a rule of thumb, avalanches generally occur on slopes with slopes above 25 degrees; Mostly in the afternoon and evening, rain and snowfall, especially foggy, windy, stormy and other bad weather are most likely to occur avalanches.

It is formed by rapid accumulation, lack of support, and by the action of gravity.

When the cohesive force of the snow on a hillside cannot resist the gravitational pull it is subjected to, it slides downward, causing a large amount of snow to collapse, known as avalanches. In some places, it is called "snow landslide", "snow quicksand" or "pushing mountain snow". At the same time, it can cause terrible natural phenomena such as landslides, landslides and mudslides.

As a result, avalanches are classified as a serious natural disaster in snow-covered mountainous areas. Avalanches are formed because of the evaporation of snow particles, which are much softer than snowpack, creating a weak zone between the ground or lower layer of snow and the upper layer of snow, which acts as a lubricator when the upper snow begins to slide down the hillside. There are many triggers caused by avalanches.

Once an avalanche occurs, it is unstoppable. Thousands of tons of snow, mixed with rock fragments, roar down at great speeds from the heights and then slide down the slopes to form a sea of snow. Everything was swept clean.

Some avalanches carry a lot of air with them, making them more fluid, sometimes even rushing through the canyon to the opposite slope. Avalanches are a great danger for mountaineers, skiers, tourists and local residents because they happen very suddenly and for a very short period of time. After summing up a lot of experience and lessons, people have some ways to prevent avalanches.

For example, firing artillery shells in some dangerous areas can cause avalanches with little snow in advance, and set up special personnel to monitor and forecast avalanches. However, as a phenomenon of starvation, avalanches can cause damage and damage to the human body from time to time. Therefore, if people travel to places where there will be avalanches, they must comply with the requirements of the local organizers and do not run around alone.

An avalanche is a natural disaster that occurs when a large amount of snow and ice suddenly loosens from a mountain slope and slides downward in a fluid state. The causes of avalanches mainly include the following aspects:

1.Topographic factors: The steepness and structure of the terrain can affect the stability of the snow. On steep slopes, the natural stability of snow is poor due to gravity, and once it is subjected to external forces, such as vibration, wind, temperature ridge and slippery, it will loosen and slide.

2.Weather factors: Changes in the weather can also affect the stability of the snow. During snowfall, the snow cover increases constantly, and if the amount of snow exceeds a certain limit, it causes the natural stability of the snow to decrease, increasing the risk of avalanches occurring.

3.Human factors: Human activities are also one of the important causes of avalanches. Sports such as skiing, skateboarding, climbing, as well as human activities such as construction and mining, can affect the structure and stability of snow, increasing the risk of avalanches.

4.Dynamic factors: Dynamic factors include volcanic eruptions, etc., which will have an impact on the stability of the mountain structure and snow, increasing the risk of avalanches.

In summary, the causes of avalanches are multifaceted, and a variety of factors need to be considered. In order to reduce the occurrence of avalanches, it is necessary to take measures to monitor and manage factors such as terrain, weather, and human activities, as well as strengthen the early warning and emergency response capabilities for avalanches.

Avalanches are a risk. Avalanches are a serious threat to climbers, local residents and tourists. Among the dangers encountered by alpine expeditions, avalanches are the most often delayed and tragic, often causing "total annihilation".

Avalanches accounted for 1 2 1 3 of all mountain deaths.

The main cause of avalanches is that the snow on the slopes is too thick. After the snow is exposed to sunlight, the surface snow melts, and the snow water seeps into the snow and the mountain slope, so that the friction between the snow and the ground is reduced. At the same time, the snow layer begins to slide downward under the force of gravity. A large amount of snow slides and causes avalanches.

In addition, running on cracked snow surfaces can also cause snow to slide and cause avalanches. There is a pattern to the occurrence of avalanches. Most avalanches occur in winter or spring when the snow is very heavy.

Especially before and after the outbreak of a blizzard. At this time, the snow is very soft and the adhesive force is relatively small, and once a small piece is destroyed, the remaining part will be like a plate of loose sand or dominoes, creating a chain reaction and falling rapidly. Yard Brigade.