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首页> 外文期刊>Natural Hazards and Earth System Sciences Discussions >Analysis of pre-earthquake ionospheric anomalies before the global M = 7.0+ earthquakes in 2010
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Analysis of pre-earthquake ionospheric anomalies before the global M = 7.0+ earthquakes in 2010

机译：2010年全球M = 7.0 +地震前发生地震前电离层异常的分析

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The pre-earthquake ionospheric anomalies that occurred before the global M = 7.0+ earthquakes in 2010 are investigated using the total electron content (TEC) from the global ionosphere map (GIM). We analyze the possible causes of the ionospheric anomalies based on the space environment and magnetic field status. Results show that some anomalies are related to the earthquakes. By analyzing the time of occurrence, duration, and spatial distribution of these ionospheric anomalies, a number of new conclusions are drawn, as follows: earthquake-related ionospheric anomalies are not bound to appear; both positive and negative anomalies are likely to occur; and the earthquake-related ionospheric anomalies discussed in the current study occurred 0–2 days before the associated earthquakes and in the afternoon to sunset (i.e. between 12:00 and 20:00 local time). Pre-earthquake ionospheric anomalies occur mainly in areas near the epicenter. However, the maximum affected area in the ionosphere does not coincide with the vertical projection of the epicenter of the subsequent earthquake. The directions deviating from the epicenters do not follow a fixed rule. The corresponding ionospheric effects can also be observed in the magnetically conjugated region. However, the probability of the anomalies appearance and extent of the anomalies in the magnetically conjugated region are smaller than the anomalies near the epicenter. Deep-focus earthquakes may also exhibit very significant pre-earthquake ionospheric anomalies.
机译：在2010年全球M = 7.0多次地震之前发生的预抗震电离层异常，使用全球电离层地图（GIM）的总电子含量（TEC）研究。我们根据空间环境和磁场地位分析电离层异常的可能原因。结果表明，一些异常与地震有关。通过分析这些电离层异常的发生时间，持续时间和空间分布，绘制了许多新的结论，如下：地震相关的电离层异常不受影响;可能发生正面和阴性异常;目前研究中讨论的地震相关的电离层异常发生在相关地震前0-2天，并在下午到日落（即12:00至20:00之间）。地震前电离层异常主要发生在震中附近的区域。然而，电离层中的最大受影响区域与随后地震的震中的垂直投影不一致。偏离震中器的方向不遵循固定规则。在磁性共轭区域中也可以观察到相应的电离层效应。然而，异常的外观和磁性共轭区域中异常的程度的概率小于震中附近的异常。深焦地震也可能表现出非常重要的地震前电离层异常。

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