What is the difference between earth light and lightning, earth sound and thunder?

First of all, distinguish the difference between ground light and lightning:

1, and their causes are different:

(1) Causes of terrestrial light: Generally speaking, small earthquakes are not easy to cause terrestrial light, and only those relatively large earthquakes will cause terrestrial light. Because the area affected by the earthquake is very large, people can see it when there is ground light, even if it is far away from the place where it happened.

(2) Causes of lightning: Storm clouds (cumulonimbus clouds) usually generate charges, with negative charges at the bottom and positive charges at the top, and also generate positive charges on the ground, which follow the clouds. Positive and negative charges attract each other, but air is not a good conductor. Positive charges rush to tree tops, hills, tall buildings and even human bodies in an attempt to meet negatively charged clouds;

The negatively charged dendritic antenna extends downward, and the farther it extends, the closer it is to the ground. Finally, the positive and negative charges finally overcome the air barrier and connect. A huge current rushed from the ground to the clouds along the conductive path, producing a bright flash.

2, the overview of the two is different:

(1) Overview of terrestrial light: Terrestrial light is the light that appears over the earthquake-affected area.

(2) Overview of lightning: Lightning is a strong discharge phenomenon between clouds, between clouds and the ground, or between different parts of clouds (generally occurring in cumulonimbus clouds).

3, the characteristics of the two are different:

(1) Features of ground light: it is colorful and visible to the naked eye.

(2) Characteristics of lightning: The length of lightning may be only a few hundred meters (the shortest is 100 meters), but the longest can reach several kilometers. The temperature of lightning varies from 17000 degrees Celsius to 28000 degrees Celsius, which is 3~5 times the surface temperature of the sun. The extreme heat of lightning caused the air along the way to expand violently. Air moves very fast, so waves are formed and sounds are made.

Second, distinguish the difference between earth sound and thunder:

1 for different reasons:

(1) Causes of earthquakes: An earthquake is an impending earthquake precursor, which often occurs in seconds, minutes, hours or days before an earthquake occurs. Earthquakes can be widely heard in or near the epicenter.

(2) Causes of thunder: The air in the lightning passage suddenly rises sharply, making its temperature as high as 15000-20000℃, which makes the air expand rapidly, and the air pressure near the passage can be increased to more than 100 atmospheric pressure. Then, it cools rapidly, the air shrinks rapidly and the pressure drops. This sudden expansion and contraction occur in a short time of a few thousandths of a second, so at the moment of lightning explosion, a shock wave will be generated.

2, the overview of the two is different:

1. Overview of geosound: When a geosound earthquake occurs, a small amount of seismic wave energy is introduced into the air and becomes sound waves. It is easy to hear the sound of the earth in the backer area where the bedrock is exposed and the topsoil is very thin. The time to hear the ground sound is usually before you feel the ground vibration, and some are after you feel the ground vibration.

2. Overview of thunder: With lightning, it is rumbling thunder. Sounds like thunder. It can be divided into three types. One is thunder as clear and loud as an explosion, which is generally called "thunderbolt"; The other is muffled thunder, which some people call "muffled thunder". There is also a low and persistent rumble, which is a bit like the sound made when grinding. People usually call it "La Morey", which is actually a form of muffled thunder.

3, the phenomenon of the two is different:

(1) earthquake: some are similar to muffled thunder; Some are similar to distant thunder, that is, the "click" sound when rocks break, while others are very weak. Near the epicenter, before the earthquake, you can hear strong winds, thunder, the sound of tanks coming, and the dull explosion of blasting rocks.

(2) Thundering phenomenon: the observer hears the thunder almost immediately after seeing the lightning; Sometimes even thunder is heard at the same time as lightning. Because lightning is near the observer, the explosion wave it produces has not evolved into ordinary sound waves, so it sounds like an explosion.

Because the ground light is very similar to lightning, some people will regard it as lightning; Similarly, because the earth sound is very similar to thunder, some people regard it as thunder.

Baidu encyclopedia-terrestrial light (physics concept)

Baidu Encyclopedia-Lightning (self-admission phenomenon)

Baidu Encyclopedia-Sheng Di

Baidu Encyclopedia-Thunder (a natural phenomenon accompanied by lightning)