The omen before the disaster, the wise move forward.

Earthquake is the rapid vibration of the earth's surface, which was also called earthquake in ancient times. Just like wind, rain, lightning, landslides and volcanic eruptions, they are natural phenomena that often occur on the earth. According to the causes of earthquakes, they can be divided into five categories: tectonic earthquakes, volcanic earthquakes, collapse earthquakes, induced earthquakes and artificial earthquakes. For human beings, the most destructive is the tectonic earthquake ~ the earthquake caused by the dislocation and fracture of rock strata in the deep underground is called the tectonic earthquake. This kind of earthquake has the highest frequency, accounting for more than 90% of the global earthquakes. Volcanic earthquake ~ earthquakes caused by volcanism, such as magmatism and gas explosion, are called volcanic earthquakes.

Volcanic earthquakes can only occur in volcanic active areas, and earthquakes in volcanic active areas only account for about 7% of global earthquakes. Collapse earthquake ~ the earthquake caused by the collapse of underground caves or the top of mines is called collapse earthquake. Such earthquakes are relatively small in scale and few in frequency. Even if it exists, it often occurs in limestone areas with dense caves or large underground mining areas. Induced earthquakes ~ Earthquakes caused by reservoir impoundment, oil field water injection and other activities are called induced earthquakes. This kind of earthquake only occurs in some specific reservoir areas or oil fields. Artificial earthquake ~ underground nuclear explosion, explosive blasting and other man-made ground vibrations are called artificial earthquakes. 1976 Tangshan earthquake is a tectonic earthquake.

In fact, it is easy for people to observe some omens before the earthquake comes. The omen mentioned here mainly refers to those unusual and strange phenomena.

I have heard that before the Tangshan earthquake, a large group of green dragonflies were seen moving in a square about 30 meters wide and about 100 meters long, and some Nocturnal Animals came out to move in broad daylight, such as flying around in the daytime. Nothing strange. I've heard of it. Before the Tangshan earthquake, a solitary lamp was seen flashing there. I think this may be due to the movement of the earth's crust, which makes the earth's magnetic field unstable, and the lamp is just placed in the unstable magnetic field, which produces the movement of cutting the magnetic field lines (the lamp is stationary and the magnetic field lines are moving), thus generating the induced current and making the lamp shine. There are many strange phenomena like this, which seem to be beyond people's knowledge and experience. These phenomena are all signs before a major earthquake.

The omen of earthquake prevention and disaster reduction knowledge learning (key) Designer's blog: Xiao Hao-hits: 84 1

I also want to register a designer blog!

Tobacco Bureau Dormitory ... Signs before the earthquake:

Before the Tangshan earthquake (at 3: 42: 53: 8 on July 28th, 1976):

Animals:

On July 24th, in Zhaogezhuang Coal Mine, Tangshan City, two goldfish in the fish tank scrambled to jump out of the water and out of the tank.

On July 25th, there was an uproar in the fish pond of Baigezhuang Fish Farm in Tangshan. Grass carp jumped in droves, and some jumped more than a foot above the water. What's even more surprising is that some fish will turn upside down and stand upside down on the water, but they will circle as fast as possible.

On July 25th, the air around the oil tanker creaked in Dagukou, Tianjin, south of Tangshan. A large group of dragonflies with dark green wings flew in, perched motionless on the window, mast and ship's side, and were caught and driven away, but none of them took off. Soon, the commotion on the ship was even greater. A large group of colorful butterflies, native locusts, black cicadas, and many sparrows and unknown birds also flew in, as if it were an unexpected party. Finally, a colorful budgerigar flew in and stood motionless at the stern.

On July 25th, a member of Xitangtuo Brigade of panzhuang Commune in Ninghai County, southern Tangshan, the old Yan under the beam, like a madman, threw Xiaoyan out of the nest every day. The owner picked Xiaoyan up and was thrown out by the old Yan. On July 27th, Lao Yan flew away with the remaining two Xiaoyan.

On the morning of July 25th, in Funing County, some people saw more than 100 weasels, the big ones with their backs on their backs and the small ones in their mouths, crawling out of the holes in the ancient walls and moving towards the village. When it was dark, a dozen of them wandered under a walnut tree, and five of them were killed on the spot. Others kept wailing and felt afraid of death. On 26th and 27th, this group of weasels continued their activities outside the village, and there was a panic atmosphere.

On July 27th, the jellyfish around the oil tanker suddenly increased. Groups of small fish swam around in a hurry, put down their hooks, and soon caught more than 100 fish.

Members of Qian 'an Township saw dragonflies flying like locusts. The flight team is 100 meters wide and lasts from east to west 15 minutes or so. Dragonflies buzzed when they flew by, and the momentum was so great that people were dumbfounded. People in Wanggaishan, Luannan County, Tangshan saw swarms of mice running in panic. The big mouse ran after the little mouse, and the little mouse bit its tail into a string. Some people were curious and ran after it, but the good-hearted people dissuaded them and said, "Stop fighting, I'm afraid it will send water."

Other phenomena:

Since the end of July, the fishermen in Beidaihe have been puzzled: how the rocks that have been exposed to the sea have been swallowed up by the sea. In the waters from Caijiabao to Dashentang near Tangshan, fishermen don't seem to believe their eyes: the clear sea has always been, why has it turned into turbid yellow? In the restless depths of the sea, it is like the legendary dragon tail swinging in the depths of the seabed and stirring the soil.

According to a diver who was working in the sea near Qinhuangdao at that time, he saw a colorful light band, like a golden dragon, which was fleeting.

On July 27th, the water level of a well in Gaokan Commune, Luanxian County, Tangshan area was abnormal.

On 26th and 27th, a rain radar on the top of Fodie Mountain in Yanqing County, which is more than 200 kilometers away from Tangshan and at an altitude of 1350 meters, and an air force early warning radar nearby continuously received strange fan-shaped finger echoes from Beijing, Tianjin and Tangshan.

On July 27th, several soldiers exclaimed in a military camp in northern Tangshan. They found a pile of steel bars underground, which were somehow generating electricity and glowing, as if an invisible man was burning and welding there.

Late at night before destruction:

Cats scratch people through curtains;

As soon as the ducks saw their master, they cried in unison, craned their necks, spread their wings and staggered. When Wang Cai went there, they chased him and tried to twist his trouser legs with their mouths.

Dogs, don't let the owner sleep, take the owner to a safe place;

The mink jumps around in the cage;

Chickens strung around and cackling on the windowsill;

The horse trotted in the street.