About a natural disaster-thunderstorm

3 ~ 5 pieces of lightning discharge at close range at the same time, which is called thunderstorm. Thunderstorms sometimes produce fireballs, ranging in diameter from 15 cm to 2 m, some as large as 5 m or more, but usually occur in minefields. After a thunderstorm produces a fireball, it often attacks life and releases powerful energy. The fireball produced by a thunderstorm travels at an ultra-high speed ranging from several meters to dozens of meters per second. It depends on the size of the fireball. The fireball formed by thunderstorm in minefield is much faster than the speed of human running, regardless of its size. Therefore, the way to avoid a thunderstorm in a minefield is to stay still and make no sound. The moving time is longer than that in places that are not minefields, usually about 2 ~ 6 hours, and of course the running time is longer. More importantly, some fireballs will open doors to attack humans, while others will attack houses. This is different.

The cause of Lei Yun, or the energy contained in it, mainly comes from the movement of the atmosphere. The movement of airflow, friction and the action of wind on clouds make them cut the magnetic lines of the earth's magnetic field, further separating and polarizing different charges and charged particles, and finally forming a Lei Yun with a large amount of charges. When the electric field intensity in thunderclouds is large enough, it will cause internal discharge in Lei Yun, or strong discharge between Lei Yun, or discharge between the earth and other objects in Lei Yun, that is, lightning stays indoors. People who work outdoors should hide in buildings.

Do not swim or do other water sports. Get out of the water and find a place to hide.

Avoid using phones with plugs or other electrical appliances, including computers.

Do not touch antennas, faucets, water pipes, barbed wire or other similar metal equipment.

Avoid taking a shower with a shower.

Do not handle flammable items in open containers.

Don't stand on the top of the mountain or near objects with high conductivity. Trees or masts are easily struck by lightning and should be kept as far away as possible. After lightning strikes an object, the current will spread through the ground, so don't lie on the ground. Wet ground is especially dangerous. You should squat down to minimize the contact area with the ground.

Hikers and other outdoor activities should carry radios with them and pay attention to the latest weather news of the Observatory.

Always pay attention to the possibility of heavy rain, and don't stay in rivers, streams or low-lying places.

Motorists should be careful of strong winds when driving on expressways or overpasses.

Small boats at sea should be careful of strong winds or waterspouts.

If you encounter a tornado, you should immediately hide in a solid building. Stay away from the window, squat on the ground, and protect your head with your hands or thick pads. If you are outdoors, stay away from trees, cars or other objects that may be blown up by tornadoes.