There are many signs that may appear before。These signs include, but are not limited to:
Well water outflow: Groundwater including well water, spring water, etc., is abnormal, such as turbidity, bubbling, flowering, heating, discoloration, taste, sudden rise, sudden fall, sudden depletion or gushing of springs, etc.
Animal abnormalities: Animals are overexcited, frightened, or slow to move, such as cows and horses panicking and barking, and fish floating in schools or jumping out of the water.
Fog appears: ** Fog from the ground appears before, this fog has a variety of colors such as white, black, yellow, sometimes colorless, often appears within a few days to a few minutes before the earthquake, accompanied by strange smell, sound or high temperature.
Abnormal ground sound: When ** occurs, there are longitudinal waves radiating from the seismic source, making the air vibrate and make sound, just like the thunder of a cannon, or the driving of a heavy vehicle, the wind blowing, etc.
Ground Light Anomaly: **The light from the ground before, mainly red and white. The shape is different, there are bands, sphericals, columns, etc. It usually occurs within a few hours to minutes before the earthquake and lasts for a few seconds.
Electromagnetic anomalies: household appliances such as radios, televisions, fluorescent lamps, etc., radio failure, fluorescent lamp self-evident, electronic alarm clock failure, etc. It also includes the abnormal operation of the electrical equipment, such as the abnormal microwave station, the radio plant is disturbed.
Please note that the above signs are not accurate***. If you encounter the above signs, it is recommended to pay attention to the official warning information in time, and follow the local instructions to take appropriate precautions.