Why can many animals foresee the coming earthquake and tsunami?

1, listening. People's hearing range is 20-20000 Hz, but many animals can hear lower frequency sounds, and earthquakes are more infrasound.

2. touch. Compared with human bipedal walking, most animals touch the ground more often. In addition, some animals have a very sensitive sense of touch, such as snakes. They get the position and distance of their prey by sensing the vibration of the ground.

3. Some organs of many animals are particularly sensitive, and they can know some disasters before humans. For example, jellyfish in the ocean can predict storms, and rats can avoid mine collapse or harmful gases in advance. As for the organs of vision, hearing, touch, vibration and balance, which plays the main role and which plays the role of assisting judgment may be different for different animals. Physical and chemical changes (vibration, electricity, magnetism, meteorology, abnormal radon content in water, etc.). ) The accompanying earthquake can often stimulate some sensory organs of some animals and cause abnormal reactions. If the gravity of an area changes, some animals may be able to feel it through its balance organs; Some animals' hearing organs may be able to detect abnormal vibrations. Before the earthquake, the underground strata have been moving slowly day by day, showing a creeping state, and there is strong friction between fault planes, so some people think that there will be low-frequency sound waves on the friction fault planes, only a few to ten times per second, which is lower than human hearing. People need more than 20 sound waves per second to feel it, but animals don't. Very sensitive animals will be frightened when they feel this sound wave, resulting in abnormal phenomena such as winter snakes coming out of holes, fish jumping out of the water, pigs and cows jumping in circles, dogs barking and wolves growling. There are many kinds of animal anomalies, including large livestock, poultry, cave animals, hibernating animals, fish and so on. The abnormal situation of animals, people also have a few words to sum up well:

Animals have signs before earthquakes, so it is very important to prevent and treat them by groups.

Cattle, sheep, mules and horses don't enter the stables, and pigs don't eat dogs and bite people.

Ducks don't go into the water and make noise on the shore, but chickens fly up the tree and scream loudly.

The snake came out of the hole in the ice and snow, and the mouse ran with the mouse in its mouth.

The rabbit jumped and bumped, and the fish jumped into the water.

Bees are moving noisily, but pigeons are too scared to fly back to their nests.

Every household observes and reports any abnormality.

In addition, some plants also had abnormal reactions before the earthquake, such as germination, flowering, fruiting or large-scale withering, abnormal exuberance and so on. Because many animals' organs are particularly sensitive to natural disasters, they can know the coming of disasters ahead of people. For example,1February 4, 975, a hibernating snake came out of the hole one and a half months before the Haicheng and Yingkou earthquakes of magnitude 7.3; Many geese panicked, screamed and couldn't get into the nest, and some even flew. One or two days before the earthquake, the pigs didn't eat and climbed the wall to arch the ground. Two days before the earthquake, little hunters bit each other, and the tails of a dozen pigs were bitten off. A black hen flew up a tree in the earthquake on February 4th. A female mackerel suddenly churned, jumped out of the water and screamed 20 minutes before the trap. Yingkou No.1 production team has six cows. The day before the earthquake, four cows were fighting for a corner, and two cows were desperately digging the ground with their hooves. A group of sika deer in the deer farm suddenly ran around, and some front legs were crushed.

China Academy of Sciences made an experimental observation on the relationship between pigeons and earthquakes. It is found that there is an ellipsoidal corpuscle near the periosteum between the tibia and fibula of pigeons, which is smaller than millet, and there are about 100, which are connected by nerves and shaped like a bunch of grapes. They are very sensitive to vibration, and the stimulation amplitude reaches several tenths of microns, which will cause nerve discharge. 100 pigeons were used in the biophysics experiment. Small particles were removed from the legs of 50 pigeons, and the other 50 pigeons remained motionless. Before the earthquake of magnitude 4, the latter was frightened out of my wits, while the former was calm as usual. It shows that the contact with the central nervous system is lost after removing the leg particles.