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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Over-the-Horizon Anomalous VHF Propagation and Earthquake Precursors
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Over-the-Horizon Anomalous VHF Propagation and Earthquake Precursors

机译：超视距异常VHF传播和地震前兆

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摘要

The purpose of this paper is to review current activities for the identification of earthquake (EQ) precursors and their epicentres. Starting with a brief description on the background to approaches using ultra-low (ULF), extremely low (ELF), very low/low (VLF/LF), medium (MF), high (HF), very high frequency (VHF) etc. radio waves for short-term EQ prediction, the paper concentrates on those characteristics of anomalous VHF reception from frequency-modulation (FM) radio transmissions and broadcast television (TV) signals in relation to EQ precursors. The possible ways to identify an impending EQ and its epicentre position as defined and observed by workers from a variety of studies fall within the purview of the paper. In attempts to find pre-EQ energy exchange and coupling processes between the lithosphere and atmosphere, the paper highlights some relevant observations of surface latent heat flux, sonic detection and ranging (SODAR) echograms and LF propagation. Explanations on possible causes leading to such anomalous reception are reviewed with reported results in association with pre-seismic induced modifications to tropospheric and ionospheric parameters.
机译：本文的目的是回顾当前用于识别地震（EQ）前兆及其震中的活动。首先简要介绍使用超低（ULF），极低（ELF），极低/极低（VLF / LF），中（MF），高（HF），极高频率（VHF）的方法的背景在短期电波预测的无线电波等方面，本文集中讨论了与调频前兆有关的来自调频（FM）无线电传输和广播电视（TV）信号的异常VHF接收的特征。各种研究中的工人所定义和观察到的，确定即将到来的情商及其震中位置的可能方法属于本文的研究范围。为了找到岩石表面与大气之间的EQ能量交换和耦合过程，本文重点介绍了表面潜热通量，声波探测和测距（SODAR）回波图和低频传播的一些相关观测结果。回顾了导致这种异常接收的可能原因的解释，并结合地震前对对流层和电离层参数的修改对报告结果进行了综述。

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