Luzhou City issued a blue rainstorm warning after an earthquake of magnitude 6 occurred in Lu Xian County, Sichuan Province. Why is it easy to rain after an earthquake?
The rainstorm after the earthquake is not an accidental phenomenon, but because the earthquake leads to the release of surface energy, which raises the surface temperature and causes a large amount of water on the ground to evaporate. At the same time, it is pushed to the sky by the energy generated by the earthquake, and then combined with the dust that also rose to the sky because of the earthquake to form a rainstorm after reaching saturation. ?
Earthquake is one of the most terrible disasters in nature, and its secondary disasters are far more than rainstorm. Aftershocks, mudslides, landslides and surface cracks are all follow-up disasters.
It often rains after earthquakes. In fact, this is a phenomenon that people summarized a long time ago. It is said that the word "earthquake" with the prefix "rain" reflects this relationship. Let's look at the cause of the earthquake first. Large-scale earthquakes are usually tectonic earthquakes, which are the result of the violent collision of the earth's plates. In the process of plate collision, a lot of energy is bound to be released, and some of the heat generated will be released into the atmosphere.
But another equally important condition is that the ground vibration caused by the earthquake will inevitably be accompanied by a large increase in the amount of dust in the air, because the vibration of the earth itself will make the dust and dust on the ground float into the air, coupled with landslides and the collapse of houses, so there will be a lot of dust floating into the air, so that there will be enough condensation nuclei in the air. These condensation nuclei and water vapor will rise when heated, and water vapor will adhere to the condensation nuclei when cold, forming small water droplets. As we all know, clouds are all formed by small water droplets. Cumulonimbus clouds formed in the troposphere are a large number of small water droplets, which may be what many people often call earthquake clouds. When there are enough water droplets and they become large enough due to collision and merger, they will become raindrops and fall down to form rainfall. ? We all know that weather changes are mainly related to the weather system, but in fact, special weather phenomena are often caused by local environmental factors, such as rainfall after earthquakes. This is a regional weather phenomenon, such as some large-scale forest fires, which are often submerged by a heavy rain. This is also because the dust and heat formed by forest fires are cold after entering the sky. As long as they encounter enough water vapor, they will condense into water droplets, form large cumulonimbus clouds, and finally form rainfall. ?
In addition, in ancient China, drums were often used to beg for rain. Although it was a superstitious activity, it was not unreasonable, because if the air vibration caused by drums kept beating on cloudy days, water vapor molecules could fully collide and combine to increase, thus forming precipitation. However, this method has little effect on rainfall, but it will still increase the probability of rainfall. ? The current artificial rainfall is actually to use the existing conditions to trigger rainfall or increase rainfall. Aircraft that artificially rain, or artillery shells and missiles launched from the ground, usually contribute to rainfall by increasing condensation nuclei in the air under sufficient water vapor environment. In short, as long as some natural and man-made phenomena contribute to the conditions for the formation of rainfall, it will certainly rain.