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首页> 外文期刊>Izvestiya. Physics of the solid earth >Geomagnetic Variations during Strong Earthquakes
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Geomagnetic Variations during Strong Earthquakes

机译：强大地震过程中的地磁变化

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摘要

We analyze the geomagnetic effect caused by the strong earthquakes using the data from the Geophysical Observatory "Mikhnevo" (MHV) of Institute of Geosphere Dynamics of Russian Academy of Sciences (IDG RAS) and from a number of observatories of the international INTERMAGNET network. It is shown that seismic events are accompanied by characteristic variations in the Earth's magnetic field. These induced geomagnetic variations contain a clearly pronounced short-period component with a period of similar to 0.5-0.8 min which is recorded during shallow earthquakes and a long-period component (similar to 5-20 min) observed in the most cases. The maximum amplitudes of the induced geomagnetic variations are similar to 1.5-5 and similar to 2-20 nT for the short-period and long-period components, respectively. It is noted that the induced geomagnetic perturbations recorded by the observatories at significantly different distances from the source of the earthquake feature almost simultaneous and morphologically similar behavior.
机译：我们分析了使用俄罗斯科学院地理学动力学研究所（IDG RAS）的地球物理观测所“MIKHNEVO”（MHV）的数据来分析了强大地震造成的地磁效应，并从国际刑事网络的许多观察者。结果表明，地震事件伴随着地球磁场的特征变化。这些诱导的地磁变异含有明显明显的短周期组分，其时期类似于0.5-0.8 min，在浅地震期间记录，在大多数情况下观察到的长期组分（类似于5-20分钟）。诱导的地磁变化的最大幅度分别类似于1.5-5，并且对于短周期和长周期分量分别类似于2-20nt。应注意，观察者记录的诱导的地磁扰动与地震源的显着不同的距离具有几乎同时和形态的类似行为。

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