Sichuan Jiuzhaigou earthquake latest news summary: at present, the earthquake has killed 19 people and injured 217 people. More than 30000 people have been evacuated, and more than 20000 people are expected to be evacuated. By 18 o'clock tonight, most of the tourists will be evacuated out of Jiuzhaigou.
The earthquake anomalies that human senses can directly perceive are called the macroscopic anomalies of earthquakes. There are various and complex forms of MACROSEISMIC anomalies, as many as hundreds of kinds of anomalies and thousands of abnormal phenomena, which can be roughly divided into: groundwater anomaly, biological anomaly, geoacoustic anomaly, geooptic anomaly, electromagnetic anomaly, Meteorological Anomaly, etc. This article from the four seas network small edition network arrangement synthesis income, the related content is only for the reference, if has the objection please contact to delete at the first time!
1. Groundwater anomaly
Groundwater includes well water, spring water, etc. The main anomalies are muddy, bubbling, flower turning, temperature rising, color changing, flavor changing, rising, falling, hole deformation, spring source drying up or gushing out. People summed up the proverb of well water change before the earthquake:
Well water is a treasure. There are omens for an earthquake.
There is no rain, the spring is muddy, and the dry well is full of water.
The water level rises and falls greatly, turning flowers and bubbling.
Some change color, some change taste. This article from the four seas network small edition network arrangement synthesis income, the related content is only for the reference, if has the objection please contact to delete at the first time!
2. Biological abnormality
Some organs of many animals are particularly sensitive. They can know the occurrence of some disasters ahead of human beings. For example, jellyfish in the ocean can predict storms, rats can avoid mine collapse or harmful gases in advance, and so on. As for the organs of vision, hearing, touch, vibration and balance sense, which play the main role and which play the auxiliary judgment role, it may be different for different animals. With the physical and chemical changes (vibration, electricity, magnetism, meteorology, radon content in water and so on) caused by earthquakes, some sense organs of some animals are often stimulated to have abnormal reactions. For example, if the gravity of an area changes, some animals may be able to sense it through its balance organ; a vibration abnormality, some animals' hearing organs may be able to detect it. Before the earthquake, the underground rock strata had been moving slowly day by day, showing a creeping state, and there was a strong friction between the fault planes, so some people think that there would be a low-frequency sound wave on the friction fault plane, which is only a few to more than ten times per second, lower than the human hearing can feel. It takes more than 20 sound waves per second for people to feel them, but not for animals. Those sensitive animals, when they feel this sound wave, will be terrified, resulting in abnormal phenomena such as winter snake going out of the hole, fish jumping on the water, pigs and cattle jumping in circles, dogs crying and wolves roaring. There are many kinds of abnormal animals, such as large livestock, poultry, cave animals, hibernating animals, fish and so on. The abnormal situation of animals has been summed up in a few words
Before the earthquake, animals have omens, so it is very important to measure and prevent the group.
Cattle, sheep, mules and horses will not enter the stable, and pigs will not eat and dogs will bite.
When the ducks don't come down the water and the banks are noisy, the chickens fly up the trees and shout loudly.
The ice and snow snake came out of the hole, and the rat ran with the mouse in its mouth.
The rabbit's ears were up and down, and the fish leaped on the water in panic.
The bees swarmed and roared, and the pigeons did not return to their nests.
Every household observed and found abnormal quick report.
In addition, some plants also have abnormal responses before the earthquake, such as germination, flowering, fruiting or large area wilting and abnormal exuberance in unsuitable seasons. This article from the four seas network small edition network arrangement synthesis income, the related content is only for the reference, if has the objection please contact to delete at the first time!
3. Meteorological abnormality
It is often described that the scientific and technological personnel of earthquake prediction are in charge of the sky, the earth and the air, which makes sense. Before the earthquake, the weather is often abnormal. There are mainly sultry before the earthquake, people are anxious and fidgety, there is no rain or drizzle for a long time, yellow fog is everywhere, the sun is dark, the wind is crazy, hail in June and so on. This article from the four seas network small edition network arrangement synthesis income, the related content is only for the reference, if has the objection please contact to delete at the first time!
4. Abnormal ground sound
Geoacoustic anomaly refers to the sound coming from underground before the earthquake. Its sound is like the sound of guns and thunder, as well as the driving of heavy vehicles, strong winds and other kinds of blows. When an earthquake occurs, there is a longitudinal wave radiated from the source and propagated along the ground, making the air vibrate and make sound. Because the velocity of the longitudinal wave is large but the potential is weak, people only hear its sound and don't feel the ground moving. Only when the transverse wave arrives, can they feel the moving. Therefore, in the epicenter area, there are often records of the sound inside the earth, like the earth's air blowing, like the boiling water swelling inside the tripod, before each earthquake. If it is in the epicenter area, the earth sound can often be heard in a magnitude 3 earthquake. The ground sound is the result of the structure and structure of the underground rock and the movement and change of the liquid and gas contained in it. It is possible to have a better prediction and prevention effect on earthquakes by mastering the knowledge of GEOSOUND.
5. Ground light abnormality
The ground light anomaly refers to the light coming from the underground before the earthquake. It has a variety of colors. It can see rare mixed colors in daily life, such as silver blue, white purple, etc., but mainly red and white. Its shapes are also different, including ribbon, ball, column, diffuse, etc. Generally, the occurrence range of ground light is relatively large, most of which occur within hours to minutes before the earthquake and last for several seconds. During and before the Haicheng, Longling, Tangshan, Songpan and other earthquakes in China, there are many colorful luminous phenomena. Most of the ground light is accompanied by earthquakes, landslides, collapses, sand gushing, water jetting and other natural phenomena at the same time. It often migrates regularly along the fault zone or a region, and is synchronous with other macro and micro anomalies. Its genesis is always closely related to the crustal movement. Controlled by the geological conditions and the state of the earth's surface and atmosphere, it can cause different degrees of harm to people, animals and plants.
At present, all the reports we have about one minute or two before the earthquake. For example, Haicheng earthquake, Lancang and Gengma earthquake have collected similar reports.
6. Earth gas anomaly
Ground gas anomaly refers to the fog coming from the underground before the earthquake, also known as ground gas fog or ground fog. This kind of fog, with white, black, yellow and other colors, sometimes colorless, often appears in the days to minutes before the earthquake, often accompanied by strange smell, sometimes accompanied by sound or with high temperature. This article from the four seas network small edition network arrangement synthesis income, the related content is only for the reference, if has the objection please contact to delete at the first time!
7. Abnormal ground motion
Ground motion anomaly refers to the shaking of the ground before the earthquake. It is a well-known phenomenon that the ground vibrates violently during an earthquake. But before the earthquake, sometimes the ground shakes. This kind of shaking is different from that of the earthquake. The shaking is very slow. The seismograph can't record it, but many people can feel it. The most significant anomaly occurred before the Haicheng earthquake with M 7.3 on February 4, 1975. From the late December 1974 to the end of January 1975, 17 earthquakes occurred in Dandong, Kuandian, Fengcheng, Shenyang, Xiuyan and other places.
8. Abnormal ground drum
The earth bulge anomaly refers to the occurrence of bulges on the ground before an earthquake. About half a year before the Luhuo M7.9 earthquake in Sichuan Province on February 6, 1973, there was a drum on a lawn in the Tuoba District of Ganzi County, which was like an upside down iron pot with a height of about 20cm. There were intermittent cracks around it. The drum disappeared several days later, repeatedly until the earthquake happened. There are also ground fissures, subsidence and so on. This article from the four seas network small edition network arrangement synthesis income, the related content is only for the reference, if has the objection please contact to delete at the first time!
9. Electromagnetic abnormality
Electromagnetic abnormality refers to the abnormality of household appliances such as radio, television, fluorescent lamp, etc. before the earthquake. The most common electromagnetic anomaly is the radio failure, and the self illumination of fluorescent lamp before the earthquake is also common in the northern region. A few days before the Tangshan M7.8 earthquake on July 28, 1976, many radios in Tangshan and its adjacent areas failed. The sound was loud and small, sometimes there was no frequency modulation, sometimes there was continuous noise. Before the Tangshan earthquake, some people in the city saw the fluorescent lights turned off at night and then turned on. Some people in Beijing turned off the fluorescent lights before going to bed, but the lights were still on. Electromagnetic abnormality also includes abnormal operation of some motor equipment, such as abnormal microwave station, interference of wireless power plant, failure of electronic alarm clock, etc.
Macroanomalies of earthquakes play an important role in earthquake prediction, especially in short-term and imminent prediction. Before the 1975 Haicheng 7.3 earthquake and 1976 Songpan and Pingwu 7.2 earthquakes, seismologists and the masses observed a large number of macroanomalies, which provided important data for the successful prediction of these two earthquakes. However, it should also be noted that the various macro phenomena listed above may be caused by a variety of reasons and are not necessarily omens of earthquakes. For example, the rise and fall of well water and spring water may be related to the amount of rainfall, or may be affected by nearby pumping, drainage and construction. The discoloration and taste of well water may be caused by pollution. The abnormal performance of animals may be related to weather change, disease, estrus, external stimulation, etc., and attention shall be paid to not mistaking electric arc, lightning, etc. for ground light, thunder, or fire Set off fireworks and flares as underground fireballs. Once an abnormal natural phenomenon is found, it is not easy to make a conclusion that an earthquake will occur immediately, let alone panic. Instead, it is necessary to make clear the time, place and relevant conditions of the occurrence of the abnormal phenomenon, protect the site, report to the government or the seismological department, and let the professionals of the seismological Department investigate and verify it to find out the truth.