1June 1 1 Huanggang, Hubei, earthquake with magnitude 3.2. Are there any signs when the earthquake comes?

According to the official measurement by China Seismological Network, an earthquake of magnitude 3.2 occurred in Huangmei County, Huanggang City, Hubei Province at 8: 27 on June 65438+1 October/October, with a focal depth of 8 kilometers and the epicenter at 29.79 degrees north latitude and 5.84 degrees east longitude. ?

Are there really signs before the earthquake?

1 well water inflow

Groundwater includes well water, spring water, etc. The main anomalies are turbidity, bubbling, flowering, temperature rise, discoloration, off-flavor, sudden rise, sudden drop, sudden exhaustion or gushing.

2 Animal abnormality

Animals are too excited, afraid or slow to move. For example, cattle and horses panic and scream; Fish float in groups, jump out of the water, etc.

3 fog appears

Fog appeared underground before the earthquake. This fog has many colors, such as white, black and yellow, and sometimes it is colorless. It often appears within a few days to a few minutes before an earthquake, accompanied by strange smell, noise or high temperature.

4. Abnormal ground sound

When an earthquake occurs, longitudinal waves radiate from the source, making the air vibrate and sound, just like guns and thunder, or heavy vehicles driving and strong winds.

5. Geophysical anomalies

Before the earthquake, the light emitted underground was mainly red and white. Different shapes, such as ribbon, sphere, column, etc. It usually appears within hours to minutes before an earthquake and lasts for a few seconds.

6 electromagnetic anomaly

Radio, TV, fluorescent lamp and other household appliances are abnormal.

Radio failure, self-evident fluorescent lamp, electronic alarm clock failure, etc. It also includes abnormal operation of motor equipment, such as abnormal microwave station and interference from wireless power plant.

However, experts also reminded that earthquakes are not the only cause of these anomalies, and specific problems should be analyzed.

What are the difficulties in earthquake prediction?

Plateau believes that the difficulty of earthquake prediction mainly lies in the complexity of the causes of earthquakes, and it is difficult to distinguish which factor is the last straw that causes earthquakes.

He said:? It is figuratively said that an earthquake is a cancer of the earth, and earthquake prediction is a plan to diagnose and treat this cancer of the earth. To paraphrase an old saying, accurate earthquake prediction is difficult? Earthquake prediction is a worldwide problem? . ?

Seismologists in China have a certain scientific understanding in predicting the annual earthquake risk analysis, but predicting? When, where and how old? The possibility of an earthquake is too great and the accuracy is not high.

Wang Genhou believes that the difficulty of earthquake prediction is related to the following three factors.

First of all, the complexity of the earthquake itself

The seismogenic process is nonlinear, its evolution path and result are not unique, and there are many possibilities. It's like cheering up a basketball. If the gas exceeds its strength, it will explode, but it is difficult to determine where it will rupture.

Second, the impenetrability of the deep crust.

The earthquake occurred at a depth of ten or twenty kilometers underground. Up to now, we can only obtain focal information through surface observation, and it is very difficult to invert the dynamic process of underground with these insufficient data.

Third, a major earthquake is a rare event.

Generally speaking, the recurrence period of major earthquakes is hundreds or even thousands of years, which limits our accumulation of seismic observation data.

How to improve earthquake prediction ability

How to improve earthquake prediction ability? Plateau admits that scientists and technicians around the world are still exploring.

In short, as long as we are based on solid basic research, have a diligent and realistic research team, have an open and relaxed research environment, and have the support and understanding of the country and people for earthquake prediction research, earthquake prediction will eventually be solved.

In addition, paying attention to earthquake early warning (after an earthquake, warning will be given to the fortified area a few seconds to dozens of seconds in advance before the seismic wave propagates to the fortified area) is also the key to reducing earthquake disasters, and China, a country with early earthquake warning in Japan, is also making efforts to carry out this work.

This time, Chengdu received the earthquake warning information 7 1 second in advance.

Xinjiang earthquake has nothing to do with Sichuan earthquake in theory.

Wang Genhou said that Sichuan is located at the junction of the Indus River and the Eurasian plate, which was originally the active zone of the plate. Jiuzhaigou is located in Longmenshan structural belt, around Sichuan Basin, which is extremely unstable and has frequent earthquakes.

From a small tectonic belt, Jinghe and Jiuzhaigou county in Xinjiang are in an unused tectonic belt, which may not be causal in theory.

What will happen to the environment after the earthquake?

Debris flow is closely related to rock damage and rainfall. Earthquakes make rocks easier to break and loosen, which will increase the probability of debris flow. After the earthquake, we should pay more attention to secondary disasters such as aftershocks, landslides, building collapses and mudslides.