Earthquake cloud (earthquake cloud) is a kind of cloud that represents earthquake in non-meteorological cloud classification. The international research on it is still superficial, and no one agrees with it so far. Now there are many favorite researchers in Japan and China. It is precisely because of the lack of in-depth research that seismologists and meteorologists unilaterally deny or explain all the problems involving seismic clouds with meteorological theory. We have reason to believe that seismic clouds will make great contributions to earthquake prediction through continuous data collection and analysis in the future.
catalogue
Thermal theory of seismic cloud formation
Electromagnetic theory
Nuclear radiation theory
debate
General characteristics of seismic clouds
Seismic clouds form a single seismic cloud.
Multiple seismic clouds
Circadian rhythm cloud
Fish scale shock cloud
Mass shock wave cloud
Sky split cloud
Classification of seismic clouds
Simple morphological analysis
history
Newer observation record
Study history
Shape feature
phenomenon
Study and explore the relationship between earthquake clouds and earthquakes
Earthquake clouds predict earthquakes.
The difference between seismic clouds
Theory of folk observation reporting the formation heat of seismic clouds
Electromagnetic theory
Nuclear radiation theory
debate
General characteristics of seismic clouds
Seismic clouds form a single seismic cloud.
Multiple seismic clouds
Circadian rhythm cloud
Fish scale shock cloud
Mass shock wave cloud
Sky split cloud
Classification of seismic clouds
Simple morphological analysis
history
Newer observation record
Study history
Symptom research and exploration of shape feature phenomenon
Correlation between seismic clouds and earthquakes, difference between seismic clouds and earthquake prediction, and formation of seismic clouds in this section.
Heat theory
When an earthquake is about to happen, a lot of heat is generated because geothermal energy is concentrated on the earthquake zone, or because the rocks on the earthquake zone are violently rubbed under the strong gravity. This heat overflows from the surface of the earth, warming the air, producing an updraft, and forming an "earthquake cloud" at high altitude. The tail end of the cloud points to the place where the earthquake occurred.
Electromagnetic theory
Before the earthquake, the rock appeared "piezomagnetic effect" under the action of geostress, which caused local changes of geomagnetic field; In-situ stress makes rocks compressed or stretched, causing changes in resistivity and local changes in electromagnetic field. Due to the influence of electromagnetic waves on the upper ionosphere, the plasma concentration in the ionosphere drops sharply, which makes the water vapor and dust arrange in an orderly and non-free manner, forming an earthquake cloud.
Nuclear radiation theory
As we know, early nuclear physicists used cloud chamber to detect nuclear radiation, adiabatic expansion with pure steam, and the temperature dropped to supersaturated state. At this time, charged particles are injected, and ions are generated on the passing path. The supersaturated gas condenses into small droplets with ions as the core, which shows the particle trajectory and can be photographed. In fact, the earth's atmosphere can be regarded as a simple cloud chamber. When radiation is generated inside the earth, a large number of penetrating ions enter the atmosphere through the crust. Under suitable conditions, water droplets condense into clouds along the radiation trajectory, which is the so-called "earthquake cloud". This hypothesis is called "the nuclear explosion hypothesis of earthquake".
debate
Earthquake is a movement process caused by continental plate movement. The plates are squeezed and separated from each other. Causing a large number of energy particles to release each other. A large number of energy particles gather between plates. A large number of energy particles will pass through the rock and reach above the ground. So the air above will absorb a lot of energy particles, which will enter the atom under the action of nuclear gravity, and the volume of the atom will begin to increase. Because the value of gravity is inversely proportional to the square of the distance, the overall attraction of the nucleus to the atom will decrease, and because the volume of the atom becomes larger, the atom as a whole is in an unstable state. When the surrounding air flow is large or the temperature difference changes greatly, water molecules collide with each other, breaking the instability of the whole atom, the atom deforms, the nucleus contracts gravitationally, and a large number of energy particles are compressed and released. A large number of energy particles are released, that is, they emit different colors. There are different opinions on the causes of earthquake clouds. The earlier theory was put forward by Professor Kunoku Dajue in Japan: Before the earthquake, huge energy was accumulated in the earth, which made the ground temperature rise, heated the air, became updraft, and spread to the stratosphere in the form of concentric circles. Make the rain cloud at an altitude of 10000 meters form a slender straw rope-like seismic cloud. The viewpoint put forward by Lu Dajiong makes up for many shortcomings in this theory. Lu pointed out that seismic clouds can be generated not only in the middle of an earthquake, but also in a fault zone far from the epicenter and with concentrated stress. When the stress is transferred to the area far away from the epicenter due to the increase of the volume before the earthquake, during the stress concentration process, the strong stress on the fault zone makes the rock squeeze and rub, which increases the heat, and the underground heat flow continuously escapes from the ground through the fault zone and rises to the high altitude, forming a banded earthquake cloud. For the mechanism of earthquake clouds, Shou Zhonghao also put forward his own model. When a huge rock is subjected to external force, the most vulnerable part breaks first, causing a small earthquake. On the one hand, these cracks reduce the binding force of rocks; On the other hand, groundwater enters through cracks, and the expansion, contraction and chemical reaction of water further reduce the binding force of rocks. With the intensification of tectonic activity in the earthquake-prone area, a lot of heat is generated due to friction and other factors, and the water in the rock becomes steam at high temperature and high pressure, and the steam reaches the surface through cracks; The water vapor reaching the surface is rising, and when the condensation conditions are met, clouds are formed. At present, there are different opinions about the cause of earthquake clouds. Although each has its own reasons, it cannot fully explain this phenomenon before the earthquake, so it is still a mystery. The earthquake itself is a very complicated process. Therefore, it is best to use comprehensive methods to predict earthquakes. Seismologists believe that when an earthquake is about to occur, a lot of heat will be generated because geothermal energy is concentrated in the earthquake zone, or because the rocks in the earthquake zone are subjected to strong stress and strong friction. This heat will escape from the surface of the earth, warming the air, generating an updraft and forming an "earthquake cloud" at high altitude. The tail end of the cloud points to the place where the earthquake occurred. Some people think that the inevitability of "earthquake cloud" is still a lack of experimental data, or it may be a coincidence. How to be specific needs further study.
Edit the general characteristics of seismic clouds in this section.
Cloud body elevation: 6000 Mi Yun body color: white, gray, orange, orange * * * Features: strong wind is not easy to change its shape, and the boundary between the sky and the cloud body is obvious, mostly wavy. Time of appearance: morning and evening
Edit the seismic cloud shape in this section.
earthquake cloud
Single seismic cloud
It is a horizontal stripe cloud, which usually appears as a single stripe with obvious depth. The existing view is that the shallow end is the epicenter. This cloud is very similar to the traces left by airplanes, so some people call it aircraft cloud. This usually indicates that there will be an earthquake in two weeks.
Multiple seismic clouds
Parallel clouds or radial clouds are parallel clouds, also known as "ribbed clouds" (whiteyp note), and most of the observations are local earthquakes; However, the existing view is that the epicenter of radial cloud is the center of its arc. These two kinds of clouds generally indicate an earthquake 2-6 days later.
Circadian rhythm cloud
A vertical cloud like a tornado or a vertical column of smoke when there is no wind. At present, there is no statement about its epicenter judgment, which indicates an earthquake three days later;
Fish scale shock cloud
The loose fish-scale cloud formed by the big cloud in a few hours often appears at the same time as the "multi-earthquake cloud", and the depth of the cloud is distinct. The existing view is that the shallow end is the epicenter, which indicates that an earthquake will occur 2~6 days later.
Mass shock wave cloud
It is a solid large or massive cloud that appears in the epicenter of an earthquake. The existing observation records are few, and it is considered that the definition of seismic cloud is far-fetched.
Sky split cloud
One-day split cloud characteristics: a long crack divides the whole cloud into two large pieces. The formation of its cracks: a sudden energy acts on the cloud, splitting the whole cloud in two. This sudden energy comes directly or indirectly from the future epicenter corresponding to the split cloud. Strong split sky clouds correspond to large-scale or large-scale earthquakes, and are seismic clouds with high credibility. Second, the "sky crack" has long been recorded in ancient books: the existing ancient manuscripts "Tianyuan Yulixiang Different Fu" and "Tianyuan Yulixiang Different Fu" also recorded the correlation between "sky crack" and "ground crack". —— Excerpted from Lu Dajiong's Earthquake Signs and Clouds 13. "Ground fissure" may refer to a long seismic cloud, which seems to split the sky in two. "Ground fissure" (a book called "Ground fissure") may refer to the ground fissure produced during the earthquake. If this is the case, then the ancients have long linked the rift between heaven and earth. —— Excerpted from Lu Dajiong's Earthquake Signs and Clouds 14. Strength identification of three-day split cloud 1 The strongest feature of split cloud is obvious cracks and thick cloud structure on both sides of cracks. Most of these clouds appear in the upcoming earthquake or shortly after the earthquake. When we see a strong split sky cloud, we should pay special attention to whether there has just been a big earthquake before. If there has just been a big earthquake before, even the strongly split sky clouds are likely to be post-earthquake clouds. 2. The weakest split sky cloud is the post-earthquake cloud. Its characteristics are: the crack is not obvious, the cloud-like structure on both sides of the crack is loose, and the whole is tangible and unreal, just like a "paper tiger". The fluffy low-altitude seismic clouds are mostly post-earthquake clouds. Medium-intensity split sky clouds mostly appear in a short period of time, which is characterized by: the structure of the clouds is thick, but the cracks are not obvious. This cloud will change: cracks will gradually become obvious and become the strongest imminent earthquake cloud. The future epicenter corresponding to the four-day split cloud is based on the existing earthquake cases and several cases of directional split clouds. The direction of the future epicenter of the upcoming fissure cloud is roughly the direction that the fissure points to the ground, and the epicentral distance is usually above 1 thousand kilometers. Combined with plate comparison, previous earthquake cases, foreshock data and other indicators, the approximate scope of the epicenter can be inferred.
Edit the classification of seismic clouds in this section.
In order to accurately interpret the earthquake clouds, we need to make a detailed classification of the usual earthquake clouds: 1 can be divided into pre-earthquake clouds and post-earthquake clouds, which can be subdivided into pregnancy period, impending period, early post-earthquake period and post-earthquake period according to the corresponding epicentral distance, and can also be divided into long distance, medium distance and short distance. Theoretically, 1 and 2 can be obtained. When they appear in a single form, there are 12 different types of seismic clouds. If the number of classifications is reduced, at least four types should be included, namely, pre-earthquake clouds of near earthquakes, post-earthquake clouds of near earthquakes, pre-earthquake clouds of far earthquakes and post-earthquake clouds of far earthquakes. The above-mentioned 12 single seismic clouds sometimes interfere with each other, and the result of interference is that two or more different types of seismic clouds appear over an area at the same time, which is called "seismic cloud superposition phenomenon". A cloud picture, if it contains two or more different types of seismic clouds, is a "seismic cloud superposition" cloud picture, which is much more complicated than a single type of cloud picture, but it reflects more information than a single type of cloud picture, and it needs careful analysis to know the information contained in it. In the past, most people did not classify earthquake clouds in detail, but simply judged them according to their shapes. The result obtained in this way is unscientific and will inevitably lead to a large number of misjudgments. In the long run, it will lead to distrust of earthquake clouds, and even think that earthquake clouds are pseudoscience. According to the previous earthquake cloud theory, there are a lot of misjudgments, and I am afraid even earthquake cloud lovers will be confused. After decades, the theory of seismic cloud has made slow progress, and there must be some bottleneck restricting its development. As long as you have the above detailed classification concepts and do a lot of detailed analysis and summary of seismic cloud images, you will have a deeper understanding and recognition ability of seismic clouds. Please remember: "Cloud is honest and won't lie". -"Earthquake Clouds" Page 2 Clouds reflect the real information of nature. At present, although we don't fully understand the mystery of seismic clouds, with the gradual deepening of human understanding of seismic clouds, seismic clouds will eventually become a recognized discipline in the scientific community.
Simple analysis of editing the shape of this paragraph
The longer the seismic cloud is, the closer it is to the time when the earthquake occurs. The darker the color of the earthquake cloud looks, the deeper the corresponding earthquake. The longer the earthquake cloud lasts, the closer the corresponding epicenter is. If the earthquake cloud is gray, it means that the earthquake is very heavy.
Edit this history
As early as the17th century, there was a record in China ancient books that "the sky is clear at noon or after sunset, but there are fine clouds like lines, which are very long and have warning signs". 1935 "Rebuilding the Records of Longde County, Gansu Province, China" records that "the sky is crisp, the sun is warm, the blue sky is clean, and suddenly dark clouds are like wisps, and Wan Ru snake is lying in the sky, which is bound to be an earthquake". Wang Shizhen, a writer in the Qing Dynasty, wrote in the "Earthquake" section, when talking about the Tancheng M8.5 earthquake on July 25th, 668, "Muyang people in Huaibei saw Yi Long soaring into the sky during the day, and the golden scales were bright, but there were no clouds in Wan Li." The dragon mentioned here seems to be a long snake-like banded cloud with "dark clouds like wisps, like long snakes". When the sun shines, it looks golden. This is one of the earthquake clouds. In addition, many county records and historical books in ancient China have such records. 1935 "Rebuilding the Records of Longde County, Gansu Province, China" records that "the sky is crisp, the sun is warm, the blue sky is clean, and suddenly dark clouds are like wisps, and Wan Ru snake is lying in the sky, which is bound to be an earthquake". 1On June 27th, 948, an abnormal banded cloud suddenly appeared in the sky of Naraichi, which seemed to split the sky in half. This strange cloud was seen by the mayor of Naraichi at that time. On the third day, a magnitude 7.3 earthquake really happened in Fukui, Japan. The mayor called this strange cloud "ribbon", "rope" or "earthquake cloud like a long snake", and thought that an earthquake would occur within a few days after the sudden appearance of "earthquake cloud" in the sky. The mayor's assertion was supported by meteorologists from the Engineering Department of Kyushu University in Japan. 1978 65438+1October 12 At about 5 pm, the mayor's speech team in the auditorium on the fifth floor of Nara Chamber of Commerce and Industry suddenly saw a slender red cloud fluttering from southwest to northeast in the sky outside the window. He immediately stopped speaking and announced to about 300 participants that this was an "earthquake cloud"! Clouds have a strong floating force and are about to break through other clouds. The "earthquake cloud" is sometimes white and sometimes black. This time it is red, because it happened at dusk. He estimated that there would be a big earthquake in two or three days. Results On the third day (noon on June 65438 +654381October+April 4), an earthquake of magnitude 7 occurred off the coast of Oshima, Izu Islands, south of Tokyo, Japan.
Edit this relatively new observation record.
1July 27, 976, Japanese real pots were extremely long and colorful; On July 28th, 2008, Tangshan earthquake with magnitude 7.8 (untested), and on May 9th, 2008, an earthquake cloud was widely radiated in Hefei. May 12 Wenchuan M8.0 earthquake (actually measured) On May 9, 2008, Tianshui, Gansu Province experienced extraordinary earthquake clouds; May 12 Wenchuan M8.0 earthquake (untested) On May 9, 2008, Linyi, Shandong Province, an unidentified earthquake cloud; May 12 Wenchuan M8.0 earthquake (confirmed) May 3, 20081,a large-scale fish scale earthquake cloud in Hefei; June 0 1 bashi channel M6.3 earthquake (actually measured) June 0 12, Qiqihar radiated earthquake cloud; On June 29th, 2008, a single white seismic cloud was observed in Miyagi, Japan. 16 July, the offshore earthquake in Kyoto, Japan, with a magnitude of 6.6 (unverified), and on August 0 1 day, 2008, a striped seismic cloud appeared in Singapore, and on August 8, 2008, an earthquake with a magnitude of 5.3 occurred in Indonesia (unverified). On August 4th, 2008, a single stripe earthquake cloud appeared in Juno, USA, and on August 7th, an earthquake of magnitude 5.2 and magnitude 5 occurred in Aleutian Islands respectively. Single stripe and fish-scale seismic clouds appear in Anchorage, USA. On August 9, an earthquake of magnitude 5.5 occurred in the Aleutian Islands, and an earthquake of magnitude 5.2 occurred on June 1 1. (Untested) On August 9, 2008, a large-scale earthquake cloud occurred in Panama, and an earthquake of magnitude 5. 1 1 occurred in Sucre, Venezuela (untested). On August 9, 2008, an earthquake cloud with unknown shape was observed many times in Xi 'an, Shaanxi, and an earthquake of magnitude 4.2 occurred in the border of Xinjiang (untested). At the junction of Renhe District of Panzhihua City, Sichuan Province and Huili County of Liangshan Yi Autonomous Prefecture (26.2 degrees north latitude and10/0.9 degrees east longitude), the epicenter was located about 50 kilometers southeast of Panzhihua City. Focal depth 10 km. 6. An earthquake cloud appeared in Yibin one and a half hours before the1earthquake. Yibin City borders Liangshan Yi Autonomous Prefecture. (Confirmed) On June 3, 2008, there were three earthquakes with magnitude less than 4 in Guyuan, Ningxia, which belonged to the same source. On the afternoon of June 4, 65438, a striped seismic cloud appeared over Guyuan City, and an earthquake with a magnitude of 6.6 occurred in Dangxiong, Tibet. On June 24th, 2008,65438+February 24th, 2008, a single seismic cloud with a small radiation band appeared in Kunming. 12: 00 On February 26th, 2008, an earthquake of magnitude 4.3 occurred at the junction of Yiliang County, Guandu District and Chenggong County, Kunming City, Yunnan Province. (Untested) On February 25th, 2008, at 65438, a large-scale seismic cloud appeared over mangshi and Ruili in Dehong Prefecture, with no obvious radial shape. 65438+At 4: 20 on February 26th, an earthquake of magnitude 4.9 occurred in Mengxiu Township, Ruili City. (Measured) On February 26th, 2008 18, at 7: 25am, there were several suspected/scale-shaped seismic clouds in Suzhou. 21On the morning of June 28th, 2009 18 or so, "colorful auspicious clouds" appeared over Sixian County, Guangxi. At 5: 09 am on June 25th, an earthquake of magnitude 5.3 occurred in Hualien, Taiwan. On July 9, 2009 19: 13, an earthquake of magnitude 6.0 occurred in Yao 'an, Wei Chu, Yunnan, with a latitude of 25.6 north and a focal depth of10/0 km east. Half an hour after the earthquake, a strange phenomenon-earthquake cloud appeared in Yao 'an. On June 65438+February 65438+around 6 am in February 2009, a "fish scale" cloud appeared over Daqing. On the night of June 5438+February 65438+February 09, 2009, an earthquake of magnitude 6.7 occurred in the waters near Hualien, Taiwan. On the afternoon of June 5438+February 65438+February 09, 2009, the radioactive band spread from east to south over Ganzhou, Jiangxi Province for a long time, covering the whole sky. On the night of June 5438+February 19, 2009, an earthquake of magnitude 6.7 occurred in Hualien, Taiwan. 1October 23rd, 2006, 10,/kloc-0, 65438+ After 8: 30 in the morning, Xi 'an Gaoling. During 20 10 65438+24 10, there were earthquake clouds in Jiangsu, Anhui, Zhejiang, Shaanxi, Shanxi and other places, or animal anomalies such as practicing snakes in groups, chickens flying and dogs jumping, pigs jumping in circles, ants moving and mice moving. An earthquake of magnitude 1.2 occurred. 20 10 At 08: 00 on March 4 18: 50, an earthquake with a magnitude of 6.7 occurred in Taiwan Province Province, China, with a focal depth of 6 kilometers. The location is at the junction of Kaohsiung County and Pingtung County. Fish scale clouds appeared in Quanzhou and Xiamen in March 1. On March 5, 20 10/7, several parallel seismic clouds appeared near Chengjiao Street, Huai 'an Road, Shijiazhuang, Hebei Province, and near Xiwang TV Tower in Century Park. 2011on March 6, 2005, an earthquake of magnitude 4.2 occurred in Tangshan. 20 10 At 6: 29 on April 4th, Anhui Province, an earthquake-like cloud was recorded (see Baidu earthquake for details). On 2 1:46:43, an earthquake of magnitude 4.5 occurred in Datong, Shanxi. 20 18 April 2nd is 18. 2 1:46:43 An earthquake of magnitude 4.5 occurred in Datong, Shanxi (see the following figure for details). 2010-4-1011:26 A single-line seismic cloud appeared in Daqing, Yingkou, Beijing. An earthquake of magnitude 4. 1 occurred in Tangshan yesterday, with a magnitude of 20 10. On April 12 18:27, three east-west gray seismic clouds appeared over Xi 'an, pointing to the west. On April 20 14, an earthquake of magnitude 7. 1 occurred in Yushu county, Qinghai province, and an east-west seismic cloud was found in Shijiazhuang, Hebei province on April1/4. 20 10 On April 4th, an earthquake of magnitude 7. 1 occurred in Yushu County, Qinghai Province (measured). On the afternoon of May 4th, 2065438+00, a north-south earthquake cloud was discovered in Wuhan, Hubei Province. On May 5th, 2065438+00, an earthquake of magnitude 6 occurred along the coast of Taiwan Province Province? The picture was taken in Hongshan District, Wuhan.
On May 27th, 20 10, a single southwest-northeast seismic cloud appeared over Taiyuan, and the cloud refers to the northeast direction. On June 5, 20 10, an earthquake of magnitude 4.6 occurred in Yangqu County, Taiyuan (20 10). At 2 pm on June 4, a prismatic cloud was visible in the eastern sky of Jianshe South Road in Taiyuan City. A long seismic cloud was found in Xiamen on August 10. 20 10 On August 22nd, 2000, an earthquake measuring 5.4 on the Richter scale occurred in Hualien, Taiwan at 2: 39 am, 2: 47 am and 2: 50 am respectively, and there were 4.4, 4.8 and 3.4 felt earthquakes in Yilan successively.
2010101June1June 17, shot in the northwest of Hunan Xiangxi Autonomous Prefecture.
A large earthquake cloud appeared in the sky, in the southwest of the cloud. There were several clouds in the sky around 10 on the morning of June 6th.
08.5. 1 1 At noon, Kannonji, Sanmenxia City, Henan Province, shot clouds to the southeast.
It is also the southwest of Indonesia earthquake cloud in Luoyang area on May 8, 20 10.
On may 8, 20 10, the direction of Indonesian earthquake cloud in Luoyang area was southwest.
On may 8, 20 10, the direction of Indonesian earthquake cloud in Luoyang area was southwest.
April 2065438+00 13 Southwest of Yushu Earthquake Cloud in Luoyang area.
April 2065438+00 13 Southwest of Yushu Earthquake Cloud in Luoyang area.
April 2065438+00 13 Southwest of Yushu Earthquake Cloud in Luoyang area.
Southwest of the cloud. I hope it won't shake the earth and there will be no casualties. At 5: 24 p.m. on 2010165438+10/2, a scaly earthquake cloud appeared over Guangzhou, Guangdong Province. 165438+1October 12 At 9: 08 pm, an earthquake measuring 5.4 on the Richter scale occurred 80.8 kilometers southeast of the Nan 'ao Seismic Station in Yilan. Earthquake clouds over Guangzhou, Guangdong Province
20 1 165438 (23rd day of the twelfth lunar month)1At about 4: 45pm on October 26th, near sunset in Dengfeng City, Zhengzhou City, Henan Province, an earthquake cloud suspected to be online appeared. 201165438+1On October 26th, a cloud appeared in Dengfeng City, Henan Province.
Edit this study history.
The international research on seismic clouds is still in recent years, among which China and Japan are in the leading position. The study of seismic clouds in China began after the 1976 Tangshan earthquake, and there have been more than ten successful examples. In Japan, there are hundreds of successful examples of using earthquake clouds to predict earthquakes. Interestingly, it was not a seismologist but a politician who first proposed the name "earthquake cloud". He is the former mayor of Fukuoka, Japan. He once personally experienced the earthquake of magnitude 7 in Fukuoka 1956, Japan, and saw with his own eyes a very strange cloud in the sky during the earthquake. As long as this kind of cloud appears in the future, there will always be earthquakes, so he called this kind of cloud "earthquake cloud". Earthquake clouds may appear before or after the earthquake. Usually, we call the earthquake cloud before the earthquake "precursor cloud" or "pre-earthquake cloud"; The seismic clouds that appear after an earthquake are called "post-earthquake clouds". Both before and after the earthquake have the shape of earthquake clouds, but they are different. The main difference is that the structure of the cloud before the earthquake is thick and powerful. After the earthquake, the structure of clouds is loose and weak, which gives people a tangible and unreal feeling: it has the shape of earthquake clouds, but it is not as strong as the clouds before the earthquake. Before the earthquake, clouds mostly appeared in high altitude, and after the earthquake, clouds mostly appeared in low altitude. When we see an earthquake cloud, we must first distinguish whether it is a pre-earthquake cloud or a post-earthquake cloud.
Edit the shape characteristics of this paragraph.
What kind of clouds are earthquake clouds? The biggest feature of this cloud is "strange", which is obviously different from ordinary clouds. Earthquake clouds can be roughly divided into four types. The first is a horizontal stripe cloud, which usually appears in a single line. This cloud is very similar to the traces left by airplanes, so some people call it aircraft cloud. But it is thick and full, which generally indicates that the epicenter is on the vertical line in the direction of the cloud, which generally indicates that there will be an earthquake in two weeks; The second is wavy or radial clouds, which generally means that there will be an earthquake after 1 week; The third is a vertical cloud like a tornado, or a vertical column of smoke when there is no wind, indicating an earthquake three days later; The fourth type is a large or massive solid cloud, which usually appears at or before an earthquake. Seismic clouds have five characteristics: 1, slender strips, sometimes straight lines, like the wake of an airplane; Sometimes it is radial, and several seismic clouds meet at one point, such as fan bones without fans in the air; Sometimes it is an interference pattern, which looks like two rows of human ribs. 2. The boundary is clear, which is different from the radial cumulus clouds that appear in the evening, and it is also an extension of several strip clouds at one point. 3. The occurrence time is mostly in the early morning or evening. 4. There are many clouds for no reason. 5. Its color is terrible.