The Central and Eastern European Infrasound Network (CEEIN) detects significant irregularities in microbarom arrivals between 15 and October 18, 2017. The processes driving the irregular microbarom arrivals are searched in the microbarom source region in the North Atlantic and in the stratospheric waveguide. Generation of microbaroms is simulated using ocean WAVEWATCHIII wave-action model and an updated source theory which combines the effects of both finite depth ocean and source directivity. Signal propagation in a uniform range independent atmosphere is considered. In the studied time interval, a dominant moving microbarom source occurs at the tail of the post-tropical storm Ophelia.

The storm Ophelia provides an opportunity to study the development of an intense microbarom source on the open ocean and particularly in coastal waters. Discrepancies between observations and modelling results are identified and discussed. This study shows that the state-of-the-art wave-action models are underestimated in coastal areas during storms which can pose a problem for civil security in coastal areas. The capability of the CEEIN stations to monitor microbaroms is proved. Measurement biases and uncertainties associated with the configurations of the CEEIN stations and current limitations of the processing method are discussed and improvements are suggested.

中欧和东欧次声网（CEEIN）在2017年10月15日至10月18日期间检测到微气压到达的严重不规则性。在北大西洋和平流层波导中的微气压源区域搜索驱动不规则微气压到达的过程。使用海洋WAVEWATCHIII波动模型和更新的源理论模拟了微气压的产生，该理论结合了有限深度海洋和源方向性的影响。考虑在均匀范围独立的气氛中的信号传播。在所研究的时间间隔内，主要的移动微气压源发生在热带后风暴奥菲莉亚的尾部。

奥菲利亚风暴提供了一个机会，可以研究公海中特别是沿海水域中强烈的微气压源的发展。确定和讨论观测值与建模结果之间的差异。这项研究表明，风暴期间沿海地区的最新波浪作用模型被低估了，这可能对沿海地区的民安构成问题。证明了CEEIN站监控微气压的能力。讨论了与CEEIN站的配置有关的测量偏差和不确定性以及处理方法的当前局限性，并提出了改进建议。