As the level of earthquake prediction, in particular the level of imminent earthquake prediction is not high enough, so before the earthquake strikes, we should pay attention to some abnormal changes in the macro. Historical facts and scientific studies have proven that before the earthquake is likely to produce some precursory changes. Earthquake precursors before an earthquake is, the natural world appear and earthquake preparation, the occurrence of various symptoms. In general there are precursors of macro-and micro-precursor into two categories. Those who feel the tube can directly perceive the earthquake precursor phenomena, collectively referred to as macro-precursor, precursor macro specifically: macro groundwater anomaly, unusual animals, weather anomalies, to sound and to light. It is worth noting: the complexity of nature may change, these anomalies occur for many reasons, not all earthquake precursors.
Groundwater:
When the rock deformation, the ground state of the aquifer will also change, so water often produce some anomalies: Well turned flower bubble, suddenly rose suddenly drop, no change muddy water, color sour it unpleasant. But the groundwater vulnerability to environmental impacts, therefore, unusual do not panic, the first report of the earthquake department.
To sound and to light:
To sound and to light often go hand in hand there are the impending shock before or when. To sound like the roar of the machine, thunder, cannon, wind whistling sound. In light of various colors and shapes, in the strip, flake, spherical, cylindrical, there are fire-like light and so on.
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