Precursors of Haiyuan earthquake (12. 16)

The "Six Precursors" before the earthquake recorded in "Rebuilding the County Records of Longde in the Republic of China" had a great influence on seismology and spread widely. "Six mega-earthquakes" means: "First, the well water is quiet without waves, suddenly muddy like ink, and mud floats up, which is bound to be an earthquake. Second, the water in the pond is blown into a hub by the wind, and the algae are entangled, and the foam rises for no reason. If the tea is boiled, it will cause an earthquake. Third, it is natural that the sea meets the wind and the waves are surging; If the wind is fine and the typhoon doesn't work, the sea water will suddenly come up, which will cause an earthquake. It is dark in the middle of the night, and the sky suddenly becomes bright and radiant, just like in broad daylight, which will cause an earthquake. The weather is sunny and warm, and the blue sky is clean. Suddenly, I saw dark clouds winding like wisps, like a long snake, crossing the air for a long time, which will inevitably lead to an earthquake. 6. When it is midsummer, it is hot and transpiration, sweating like rain, feeling cold like ice and snow, cold air attacking people, and muscles are millet, which will cause earthquakes. " It is said that before the Haiyuan earthquake, there were many signs that this disaster was coming. That year was also a persistent drought, with unusually high temperature, rainy and snowy weather, or earth fog flooding the sun and the moon, or black or yellow wind blowing sand wildly, making chickens and dogs restless, cattle, horses, sheep, pigs and other livestock frightened, birds screaming past, the groundwater level fluctuating, the northwest sky rolling, the valley empty and underground thunder rumbling.