The phenomenon of synchronous episodic increase in gravimetric noise at the stations distant by thousands of kilometers from each other is described. The comparison with microseismic noise suggests inertial rather than gravimetric origin of the recorded anomalies. The duration of anomalous enhancement in microvibrations ranges from a few hours to a few days. The nature of synchronous microvibrations involving significant segments of the Earth’s lithosphere is unclear; the probable causes are discussed. The conducted analysis has shown that among the key factors responsible for the increase in the microseismic noise in the European part of Russia is the influence of marginal seas, in particular, the storm-generated microseisms. The allowance for this phenomenon is necessary in planning and conducting high-precision gravity surveys and long-term gravity observations.

中文翻译：

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欧亚大陆北部同步大陆微震的一个可能原因

描述了相距数千公里的站点重力噪声同步间歇性增加的现象。与微震噪声的比较表明所记录异常的惯性而不是重力起源。微振动异常增强的持续时间从几小时到几天不等。涉及地球岩石圈重要部分的同步微振动的性质尚不清楚；讨论了可能的原因。进行的分析表明，导致俄罗斯欧洲部分微地震噪声增加的关键因素之一是边缘海的影响，特别是风暴产生的微地震。