In June 2014, a number of meteotsunamis were detected in the Mediterranean and Black Sea area. These meteotsunamis were initiated by a unique high-altitude dynamical system which was initially originated above Spain and traveled across the Mediterranean Sea towards Black Sea and Turkey. Meteotsunamis unlike tsunamis driven by strong earthquakes are local events, and their formation has different mechanism. Atmospheric internal gravity waves (IGWs) are one of the main known sources of meteotsunamis (e.g. Vilibić et al. in Pure Appl Geophys 165:2169–2195, 2008). The synoptic system produced short-lived and small-scale atmospheric pressure perturbations which drifted with the jet stream-like bubbles and generated tsunami-like waves in the open waters. The bubbles with typical dimensions 15–60 km continuously form and collapse in the atmosphere at altitudes of 3–6 km. Such a “boiled” atmosphere generated IGWs propagating both downward, where they produced meteotsunamis (presumably under Proudman resonance condition) and upward into the ionosphere, with following dissipation and excitation of plasma density perturbations. One of the few experimental techniques, which can monitor perturbations of the ionization within the lower ionosphere, uses long-wave probing by very low and low frequency (VLF/LF) radio signals. To study the ionospheric disturbances observed during the chain of meteotsunamis affecting the Mediterranean Sea, we used VLF/LF data collected in South Europe by “The International Network for Frontier Research on Earthquake Precursors”. By applying the spectral analysis method to the anomalous VLF/LF signals, it was found that revealed periods of the signal variations were from 10 to 40–70 min in different stations, which are in the range of the atmospheric pressure oscillations and the meteotsunami events. These periods also correspond to the periods of IGWs.

2014年6月，在地中海和黑海地区发现了许多海啸。这些海啸是由独特的高空动力系统引发的，该系统最初起源于西班牙上空，并横跨地中海向黑海和土耳其行驶。与强烈地震驱动的海啸不同，流星海啸是局部事件，其形成机制不同。大气内部重力波（IGWs）是已知的海啸的主要来源之一（例如Vilibić等人在Pure Appl Geophys 165：2169-2195，2008中）。对流系统产生短暂且小规模的大气压扰动，并随射流状气泡漂移并在开阔水域中产生海啸状波。典型尺寸为15–60 km的气泡在3–6 km的高度在大气中连续形成并坍塌。这种“沸腾”的大气层产生了IGW，它们向下传播，在其中产生了海啸（大概在Proudman共振条件下），然后向上进入电离层，随后消散并激发了等离子体密度扰动。可以监视较低电离层内电离扰动的少数实验技术之一，是通过非常低频和低频（VLF / LF）无线电信号进行长波探测。为了研究在影响地中海的海啸链中观察到的电离层扰动，我们使用了“国际地震前兆前沿研究网络”在南欧收集的甚低频/低频数据。通过对异常的VLF / LF信号应用频谱分析方法，发现在不同的站点，信号变化的揭示周期为10到40-70分钟，这在大气压振荡和气象海啸事件的范围内。这些时期也对应于IGW的时期。