There is a way to avoid lightning… “When thunder strikes, remember the ’30/30 rule’”
As a result of casualties caused by lightning strikes on the beach in Yangyang-gun, Gangwon-do, interest in lightning strikes is high. Lightning is observed tens of thousands of times a year, but since it usually appears along with heavy rain, there is less vigilance against the lightning itself. ‘Lightning in the dry sky’ is also a very rare phenomenon.
Lightning accidents lead to fatal accidents mainly in summer in mountainous regions and flatlands without high structures around them. The beach or sea level is also a ‘wet plain’ and belongs to the danger zone. According to the Korea Meteorological Administration, 71.5% of lightning strikes that occur in Korea each year are concentrated between June and August.
Indoor ‘safety’ during thunder and lightning
Lightning is a phenomenon in which electrically charged particles fall to the ground from a thunderstorm cloud and release electricity. This is called a discharge, and at that time, the explosion sound caused by the rapid expansion of the surrounding atmosphere is thunder, and the strong light is lightning. About 25% of lightning becomes lightning.
Lightning is most likely to occur when it rains heavily or when the lower atmosphere is humid. This is because moisture in the air plays a role in delivering electrical particles in clouds to the ground. When the air is dry, electricity does not go down.
There is no way to counter the lightning suddenly falling to the ground. should be avoided unconditionally. The voltage at the place where lightning passes is about 100 million volts or more, and the temperature is 27,000 degrees, four times hotter than the surface of the sun, so if a person gets hit, 80% will die instantly.
If the Korea Meteorological Administration has predicted ‘rain with thunder and lightning’ or ‘rain due to atmospheric instability’, you should refrain from outdoor activities. When lightning is predicted, refrain from hiking, golfing, and fishing activities as much as possible, and prepare a raincoat rather than an umbrella when going out inevitably. According to the ‘Lightning Risk Prevention Action Tips’ published by the Korea Electric Research Institute (KERI) last year, to avoid lightning, avoid high and pointed places such as trees, streetlights, and telephone poles during thunderstorms and stay inside
The recommendation to stay as far away from sharp structures as possible during thunderstorms is because charged particles tend to reach sharp objects first in order to move quickly. In the same principle, long objects such as umbrellas, hiking sticks, and golf clubs should be dropped from the body and refrain from lifting them above the head.
In fact, the Electric Research Institute revealed that mannequins that were higher than the ground or holding umbrellas above their heads were hit by lightning more in an experiment assuming a day when a lightning strike occurred.
When escaping into a nearby building, it is best to lower your body as much as possible, touch only one foot on the ground, or run with a short stride. If the stride length is long, a potential difference may occur between the two feet, causing damage to the body. When lightning strikes a pasture, cows with a large distance between the front and hind feet are killed in droves, for the same reason.
If you are driving, park your car in a safe place and do not get out of the car. This is because the lightning striking the car is absorbed into the ground through the tires through the outside of the car body, which is made of metal that conducts electricity in an instant, without passing through the interior, which is an insulator.
Do not use open-top cars, motorcycles, bicycles, tractors, golf carts, or combines. This is because lightning may fall directly on a person, and plastic or wooden materials may explode when they are heated from the inside without passing through. Trees and pavilions do not block lightning, but rather are easily struck by lightning, so do not avoid under them.
Partially open shelters such as unprotected sheds and wooden or stone huts or bus stops should be avoided by crouching in the center, as far away from the walls as possible. In an open space, it’s best to crouch down with your legs together, your hands over your ears, and your head close to the ground. At home, electronics must be unplugged.
There is a ’30-30 rule’ to avoid thunderbolts. If thunder roars within 30 seconds of lightning strikes, evacuate immediately to a safe place and move after 30 minutes after the last thunder roar. The speed of light is 300,000 km /s and the speed of sound is 330 m/s. If lightning flashes and thunder is heard 6 to 7 seconds later, it means that lightning strikes at a distance스포츠토토 of about 2 km.
Lightning patient, immediate artificial respiration and cardiopulmonary resuscitation… Burn patients must be moved quickly
If you get electrocuted by lightning, call 119 as soon as possible and get first aid. First, move the lightning victim to a safe place from lightning together with the people around them and check if they are conscious.
If unconscious, check for breathing and pulse, and if breathing has stopped, artificial respiration should be performed.
It is good to take first aid measures and maintain the body temperature of the victim together with the people around them until 119 rescuers arrive. If the victim has a pulse and is breathing, work with others to locate the victim’s other wounds as quickly as possible.
While checking the degree of burns in the area where lightning entered and exited the body, damage to the nervous system, fractures, and hearing and vision damage were checked. If the victim is conscious, help the victim to stabilize himself in the most comfortable position together with those around him.
Experts advise that even if the patient is conscious and healthy, an electric shock can cause burns deep inside the body, so it is necessary to seek emergency medical attention at a hospital as soon as possible.
Lightning is largely divided into direct lightning strike, contact lightning strike, side flashover, and stride voltage. A direct strike is when lightning strikes a person directly and falls to the ground. In both cases, most die from organ damage, including heart attacks.
A lateral flashover is when lightning strikes an object and is transmitted to a person through the air. If current flows through the heart or head, death occurs. Stride voltage is when a lightning bolt that has fallen to the ground flows into the foot of a nearby person while it is still on the ground. If the voltage difference between both feet exceeds a certain value, it can be dangerous.
For instructions on how to act when lightning is predicted, check the National Disaster Safety Portal of the Ministry of Public Administration and Security, or refer to the ‘Lightning Safety Guidebook’ and ‘How to Avoid Lightning’ on the website of the Electric Research Institute ( www.keri.re.kr ) and YouTube channel.