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Study on thermal anomalies of earthquake process by using tidal-force and outgoing-longwave-radiation

机译：利用潮汐力和出射长波辐射研究地震过程的热异常

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Four earthquakes above magnitude 5.0 in Yunnan and Tibet, China occurred from 2010 to 2011. By calculating the tidal-force changes induced by celestial bodies in this region, we found that the earthquakes occurred when tidal-forces continuous?ly grew from low to peak levels and approached the maximum amplitude phase, which indicated a tidal-force that had a trigger or inducing effect of active tectonic earthquakes when the ground stress reached a critical point. At the same time analyzing the abnormal changes of outgoing longwave radiation (OLR), along with the tidal cycle, indicated that the regional distribution of the enhancement region of OLR anomalies was closely related to geologic structure, especially ac?tive faults. The OLR radiation anomaly evolved: an initial infrared rise, followed by an enhancement reaching peak, attenuation, and then a return to normal. The entire process was similar to changes observed in rock-breaking process under stress loads. Our investigation showed that the tidal-force changes caused by ce?lestial bodies could trigger an earthquake when tectonic stress reached its critical breaking point, and the OLR anomaly was the radiation signature of the change in seismic tectonic stress. Therefore, the method of combining measurements of the tidal-force changes induced by celestial bodies with those of thermal-anomaly changes has some practical value for detecting the precursor state of impending earthquakes.
机译：从2010年到2011年，中国云南和西藏发生了4次5.0级以上的地震。通过计算该地区天体引起的潮汐力变化，我们发现地震发生在潮汐力从低到高连续增长的时候。并达到最大振幅相位，这表明潮汐力在地面应力达到临界点时具有触发或诱发活动构造地震的作用。同时，分析了长波辐射的异常变化以及潮汐周期，表明OLR异常增强区的区域分布与地质构造，特别是活动断层密切相关。 OLR辐射异常发展：最初的红外上升，然后增强达到峰值，衰减，然后又恢复正常。整个过程类似于在应力作用下的岩石破碎过程中观察到的变化。我们的研究表明，当构造应力达到临界断裂点时，由空洞体引起的潮汐力变化可能引发地震，而OLR异常是地震构造应力变化的辐射特征。因此，将天体引起的潮汐力变化的测量结果与热异常变化的测量结果相结合的方法，对于检测即将发生的地震的前兆状态具有一定的实用价值。

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