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首页> 外文期刊>Acoustical physics >Anomaly in high-frequency geoacoustic emission as a close earthquake precursor
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Anomaly in high-frequency geoacoustic emission as a close earthquake precursor

机译：高频地声发射异常作为近震前兆

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摘要

One of the possible earthquake precursor mechanisms, namely, acoustic emission, is discussed. The phenomenon of acoustic emission consists in the emission of acoustic pulses due to the formation of microfaults and cracks that precede fracture of objects, rock collapse in mines, earthquakes, etc. By the example of the geoacoustic emission observation on the Kamchatka Peninsula in the area of the Avachinskaya Bay and by the analysis of anomalies of this emission that accompany major seismic events, it is shown that anomalous geoacoustic noise is generated by the stress produced in the medium prior to these events. The high-frequency range (4-11 kHz) is most informative for the observation of geoacoustic noise caused by the crack formation processes.
机译：讨论了可能的地震先兆机制之一，即声发射。声发射现象包括由于微断层和物体破裂，矿井中的岩石塌陷，地震等之前形成的微断层和裂缝而引起的声脉冲发射。以该地区堪察加半岛的地声发射观测为例通过分析伴随重大地震事件的这种发射异常，可以看出异常地震声是由这些事件之前介质中产生的应力产生的。高频范围（4-11 kHz）对于观察由裂纹形成过程引起的地声噪声最为有用。

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