The mechanism of earthquake´s thermal infrared radiation precursory on remote sensing images

At present, some satellites can acquire the radiation of the long-wave infrared emitted from natural objects on the ground, and can monitor the precursory information of the change of the thermal IR before earthquake. In fact, the temperature of the Earth´s surface is a result that certain factors of the Earth´s surface thermal balance system affect each other. There is much uncertainty when we capture the pre-earthquake temperature abnormal information by means of satellite thermal infrared sensor and there also are many reasons to cause thermal information to be abnormal. In order to investigate containing water changing in surface soil related to recorded lot of micro-quake before earthquakes, we have carried out the experiment in laboratory. The purpose of the experiment is to explore the acoustic waves from micro-fracture before earthquake which are able to change containing water in surface soil, so as to simulate the thermal abnormal picture on the remote sensing image related to a earthquake. The result of the experiment shows that the containing water in the surface soil originally taken on the natural decreasing trend in the spontaneous evaporation situation, as soon as the acoustic wave enters into the surface soil then the containing water is up. From the experiment result, we proposed that the change of water content in the Earth surface soils maybe was the one of mainly reasons that could be caused the thermal infrared radiation precursory information on the remote sensing images by the earthquake activity.