Two conditions of rainfall:
1. Water vapor in the air reaches supersaturation.
2. There are enough coagulative nodules.
The explanation is as follows:
1. After the earthquake, there are many cracks, and a large amount of heat inside the earth is released. At the same time, the ground temperature is increased, evaporation is strengthened, and some underground water vapor enters the air along the cracks, thus forming a strong updraft on the ground; After an earthquake, the dust in the air increases, that is, condensation nodules, so precipitation usually forms after an earthquake.
2. Since the earthquake is caused by a large amount of dust in the air, coupled with the heating effect of metal minerals in the geomagnetic crust, the ground water evaporates rapidly, which means that there should be a period of muggy weather before the earthquake. After the earthquake, the large area release of ground and underground energy accelerates the saturation of water and gas in the sky, At the same time, the huge energy makes the rising speed and height of this part of water vapor increase greatly and enter the high-altitude and low-temperature area. These water vapor and dust will condense into water or ice and fall down, which is the reason for rain after the earthquake.
In the same way, large forest fires will eventually end with heavy rain.