Look for the abnormal weather before the earthquake, such as continuous drought, continuous rain, etc...

1. There will be ground light;

2. Gas is coming out of the crater or the gas is coming out faster than before;

3. A pungent odor can be smelled in the crater and surrounding areas, usually of sulfur and hydrogen sulfide.

4. The surrounding electromagnetic waves undergo abnormal changes;

5. The water temperature around the volcano will be much higher than usual.

6. Small animals (such as pigs, dogs, cats, poultry, etc.) will be irritable and restless.

7. There are ponds and other places where water accumulates in the volcano and its surroundings. The water will become hot, sour and corrosive;

8. The crater may be large or small. Minor earthquake phenomenon.