Single earthquake clouds
are horizontal strip-shaped clouds, usually appearing as a single strip with distinct depths. The current view is that the shallower end is the epicenter. This kind of cloud resembles the traces left by an airplane after it flies by, so some people call it an airplane cloud. It generally indicates that there will be an earthquake in 2 weeks.
Multiple earthquake clouds
They form parallel or radial clouds. Parallel multiple clouds are also called "paigu clouds" (whiteyp added). Most of the current observations are local earthquakes. ; The current view is that the epicenter of a radial cloud is the center of the circle where its arc points. These two types of clouds generally indicate an earthquake 2 to 6 days later.
Cirrona clouds
Clouds that are vertical like tornadoes, or like vertical smoke columns when there is no wind. There is currently no statement about the epicenter, which indicates an earthquake three days later;
Fishscale earthquake cloud
A loose fish-scale cloud formed by large clouds within a few hours The clouds often appear together with "multiple earthquake clouds", and the clouds have distinct depths. The current view is that the shallow end is the epicenter, indicating an earthquake 2 to 6 days later.
Agglomerate cloud
It is a solid-shaped large or lumpy cloud that appears at the epicenter of an earthquake. There are few existing observational records and the definition of seismic clouds is considered to be far-fetched.
Sky Split Cloud
One day Split Cloud Features: A long crack divides the entire cloud into two large pieces. The formation of the crack: a sudden energy acts on the cloud, splitting the entire cloud into two. This sudden energy directly or indirectly comes from the future epicenter corresponding to the sky-splitting cloud. A strong sky cracking cloud corresponds to a larger or large-magnitude earthquake, and it is a highly credible earthquake cloud. 2. "Tian split" has long been recorded in ancient books: the existing ancient manuscripts "Tian Yuan Yu Li Xiang Yi Fu" and "Tian Yuan Yu Li Xiang Yi Fu Illustration" also record "Tian split" and "earth split" correlation. ——Excerpted from page 13 of "Zhen Zhao Yunxia" by Lu Dajiong. "Tiankai" may refer to long ribbon-shaped earthquake clouds that seem to split the sky into two halves, and "earth crack" (one book refers to "earth splitting") may refer to the cracks in the ground produced during earthquakes. If so, then the ancients had long associated the cracking of the sky with the cracking of the earth. ——Excerpted from page 14 of "Zhen Zhao Yunxia" by Lu Dajiong. Three days to identify the strength of sky-splitting clouds 1. Characteristics of the strongest sky-splitting clouds: obvious cracks and thick cloud structures on both sides of the cracks. Most of these clouds appear before an earthquake or a short time after an earthquake. When we see strong sky-cracking clouds, we should pay special attention to whether a major earthquake has just occurred before. If a major earthquake has just occurred before, even strong sky-cracking clouds are very likely to be post-earthquake clouds. 2. The weakest sky-cracking clouds are post-earthquake clouds, which are characterized by: the cracks are not obvious, the cloud structure on both sides of the cracks is loose, and the whole is intangible, like a "paper tiger". Most of the low-altitude earthquake clouds with fluffy structure are post-earthquake clouds. 3. Moderate-intensity sky-splitting clouds mostly appear during short-term periods. Their characteristics are: the cloud structure is thick, but the cracks are not obvious. This type of cloud changes: cracks gradually become apparent, transforming into the strongest impending earthquake clouds. The future epicenters corresponding to the four sky-cracking clouds are based on existing earthquake cases and several cases of directional sky-cracking clouds.
The future epicenter direction of the crack cloud on the day of the earthquake is roughly the direction where the crack points to the ground. The epicenter distance is usually more than 1,000 kilometers. Combined with plate correlation, past earthquake cases, foreshock data and other indicators, the approximate range of the epicenter can be inferred