Why do strong winds, smog and low temperatures sometimes appear before earthquakes?

Abnormal phenomena such as strong wind, smog and low temperature sometimes occur before earthquakes, which may be due to the following reasons:

1. Ground-air anomaly: fog from underground before the earthquake, also known as ground fog or ground fog. This kind of fog has many colors such as white, black and yellow, and sometimes it is colorless. It often appears within a few days to a few minutes before an earthquake, often accompanied by a strange smell, sometimes accompanied by noise or high temperature.

2. The ground vibration before the earthquake. It is a well-known phenomenon that the ground vibrates violently during an earthquake. But before the earthquake, sometimes I feel the ground shaking. This kind of shaking is different from an earthquake, and it swings very slowly. Seismographs often can't record it, but many people can feel it.

3. Abnormal ground uplift: There was a uplift on the ground before the earthquake. 1About half a year before the earthquake of magnitude 7.9 in Luhuo, Sichuan on February 6, 973, a bulge with a diameter of about 0.002 m and a center depth of about 0.005 m appeared on a lawn in Tuoba District, Ganzi County. After a few days, the protruding skin falls off, bulges and disappears after a few days.

4. Groundwater anomaly: sudden rise and fall of groundwater level, whirling, bubbling, discoloration and odor of well water may mean that an earthquake is about to happen.

5. Meteorological anomalies: Before earthquakes, meteorological anomalies often occur. For example, before the earthquake, the weather was sultry, people were anxious, it didn't rain for a long time or continuously, it rained cats and dogs for no reason, and it was warm in winter and cool in summer or foggy.

Please note that these phenomena do not occur in every earthquake, so the appearance of these phenomena does not necessarily mean that an earthquake will occur. At the same time, these phenomena are not concrete manifestations of earthquakes, so the occurrence of earthquakes cannot be determined by these phenomena alone. If you suspect the possibility of an earthquake, you should immediately report it to the local earthquake monitoring agency and follow the guidance of professionals.