There is no direct relationship between the earthquake cloud and the time of the earthquake. According to the records, it is more likely that an earthquake will occur 1-7 days after the earthquake cloud appears. The problem is that what you see is not necessarily an earthquake cloud. Nowadays, many people often regard ordinary high-level clouds as earthquake clouds because they don't know how to distinguish them.

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There are many kinds of "earthquake clouds" on the Internet, mainly altocumulus clouds or stratocumulus clouds, because these two kinds of clouds are easy to form "weird" shapes such as mesh (fish scale), wavy (prismatic), flocculent, transparent, radial and pod. In addition, it sometimes appears in the evening or early morning, dyed with the color of sunset or sunrise, and it is even more doubtful that "there is a vision in the sky."

However, altocumulus and stratocumulus, including other clouds suspected to be "earthquake clouds", all have their corresponding genera and species in the scientific classification of clouds, and their causes have scientific explanations, so they cannot be used to predict earthquakes.

Many people think these clouds are "weird" because they seldom look up at them; For meteorological observers, these "weird" clouds are not weird or rare.