地震前兆与地震观测（Earthquake precursor and earthquake observation）.docVIP

地震前兆与地震观测（Earthquake precursor and earthquake observation） Earthquake precursor and earthquake observation Under the action of crustal stress, a series of abnormal changes in physical, chemical, biological, and meteorological phenomena can be caused by the accumulation and strengthening of stress and strain in the source and its vicinity. We call these anomalies associated with the occurrence and occurrence of earthquakes as earthquake precursors (also known as earthquake anomalies). It includes two categories: Seismic micro anomaly and seismic macroscopic anomaly. (1) macroscopic anomalies of earthquakes; The abnormal phenomena of earthquakes that can be directly perceived by the human senses are called macroscopic anomalies of earthquakes. Form macro seismic anomaly diverse and complex, unusual species as many as hundreds of thousands of abnormal phenomenon, can be divided into: groundwater anomalies, biological abnormalities, abnormal, abnormal light, sound, electromagnetic anomaly weather anomaly etc.. 1, groundwater anomalies Groundwater includes wells, springs and so on. The main exceptions are made muddy, bubble, roll, temperature, color, taste, abrupt rise and fall, borehole deformation, a fountain suddenlyexhaustion or gush etc.. People have summed up the proverb about well water changes before earthquakes: Well water is a treasure, an earthquake has its precursor. No rain muddy springs, day risk wells. The water level rises and falls, turns the flowers and bubbles. Some change color, others change flavor. 2, biological abnormalities Many animal certain organs it can feel very sensitive than humans know ahead of some disaster events, such as jellyfish in the sea can forecast storm, the mouse can advance to avoid mine collapse or harmful gas and so on. As for the visual, auditory, tactile, vibratory, and balance organs, which plays a major role, and which serves as an auxiliary judgment, may be different for different animals. The physical and chemical chang