What are the abnormal signs before an earthquake?

Abnormal signs before earthquakes include: meteorological anomalies, well water gushing out, animal anomalies, fog appearance, ground sound anomalies, ground light anomalies, electromagnetic anomalies, seismic anomalies, etc.

Weather anomalies

Strong winds rose and fell, black and red clouds were in the sky, and heavy rain poured down. Before the earthquake, the weather was sultry and hot, and the walls of the houses were as hot as charcoal fire.

Well water gushing out

Groundwater includes well water, spring water, etc. The main abnormalities include muddying, bubbling, turning flowers, rising temperature, changing color, changing taste, sudden rise and fall, sudden drying up or gushing of springs, etc.

Animal abnormalities

Animals are overly excited, frightened, or slow to move. For example, cows and horses are panicking and barking; fish are floating in groups and jumping out of the water.

Mist appears

Mist appeared from underground before the earthquake. This kind of fog comes in a variety of colors, including white, black, yellow, and sometimes colorless. It often appears a few days to a few minutes before an earthquake, accompanied by strange smells, sounds, or high temperatures.

Abnormal ground sounds

When an earthquake occurs, longitudinal waves radiate from the source, causing the air to vibrate and make sounds, like cannons and thunder, or heavy vehicles driving, strong winds, etc.

Abnormal ground light

The light coming from the underground before the earthquake was mainly red and white. There are different shapes, including ribbon, spherical, columnar, etc. They usually appear a few hours to a few minutes before the earthquake and last for a few seconds.

Electromagnetic anomalies

Household appliances such as radios, televisions, fluorescent lamps, etc. have abnormalities. The radio fails, the fluorescent lamp self-illuminates, the electronic alarm clock fails, etc. It also includes abnormal operation of electrical equipment, such as abnormalities in microwave stations and interference in radio plants.

Seismic anomalies

refers to the shaking of the ground before an earthquake. It is a well-known phenomenon that the ground vibrates violently during earthquakes. But before an earthquake occurs, sometimes the ground is shaken. This shaking is different from that during an earthquake. It swings very slowly and is often not recorded by seismometers, but many people can feel it. Abnormal floor drum refers to a bulge appearing on the ground before an earthquake.

Although macroscopic abnormalities are easy to observe, due to the influence and interference of human activities, meteorological climate, environmental factors, physiological factors of animals and plants, etc., they have shortcomings such as difficulty in identification and quantification, and it is currently difficult to detect To separate from microscopic anomalies and apply it independently to earthquake prediction, specific problems must be analyzed in detail.