The earthquake caused a change in the weather.

It's precipitation caused by sudden changes in temperature.

Before an earthquake, especially before a strong earthquake, there will always be some climate and weather anomalies. Such as thermal anomalies, are very obvious before some earthquakes. 17.3 days before the Xingtai earthquake on March 8, 1966, the average temperature rose from-0/3 degrees to 1 1 degrees above zero. Ten days before the Haicheng1February 4, 975 earthquake with magnitude 7.3 was 3.7 degrees higher than the same period of last year. The explosive temperature rise from 8: 00 to 9: 30 12 degrees on the day of the impending earthquake made the cold winter sultry.

This abnormal phenomenon is due to the fact that the earthquake-prone area is on the eve of the violent change of the crust, and before the rupture, the underground heat energy has been violently diffused and transported to the atmosphere by some means. This thermal anomaly has a small range and a short duration.

Some experts have come to the conclusion that in a certain period of time one year or several years before the earthquake, drought first followed by waterlogging, or flood followed by drought; Or drought and flood alternate, followed by a big earthquake. Such earthquakes occur both at home and abroad, such as the Nantong earthquake of 1970. In the first two or three years, a once-in-a-century flood occurred, which triggered a major flood, and then a rare drought occurred. 1989 alternating drought and flood occurred before Daming earthquake in Hebei province. Other phenomena include strange wind, lewd rain, yellow dust and atmospheric turbidity before the earthquake.