Kundu Bhaskar, Senapati Batakrushna, Matsushita Ai, Heki Kosuke
Department of Earth and Atmospheric Science, NIT Rourkela, Rourkela, 769008, India.
Department of Earth and Planetary Science, Hokkaido University, Sapporo, Hokkaido, 060-0810, Japan.
Sci Rep. 2021 Feb 2;11(1):2793. doi: 10.1038/s41598-021-82355-5.
Atmospheric waves excited by strong surface explosions, both natural and anthropogenic, often disturb upper atmosphere. In this letter, we report an N-shaped pulse with period ~ 1.3 min propagating southward at ~ 0.8 km/s, observed as changes in ionospheric total electron content using continuous GNSS stations in Israel and Palestine, ~ 10 min after the August 4, 2020 chemical explosion in Beirut, Lebanon. The peak-to-peak amplitude of the disturbance reached ~ 2% of the background electrons, comparable to recently recorded volcanic explosions in the Japanese Islands. We also succeeded in reproducing the observed disturbances assuming acoustic waves propagating upward and their interaction with geomagnetic fields.
由强烈的地表爆炸（包括自然爆炸和人为爆炸）激发的大气波常常会扰动高层大气。在本信函中，我们报告了一个周期约为1.3分钟、以约0.8千米/秒的速度向南传播的N形脉冲，该脉冲是在2020年8月4日黎巴嫩贝鲁特发生化学爆炸约10分钟后，利用以色列和巴勒斯坦的连续全球导航卫星系统（GNSS）站观测到的电离层总电子含量变化而发现的。扰动的峰峰值幅度达到背景电子的约2%，与日本群岛近期记录的火山爆发相当。我们还成功地通过假设声波向上传播及其与地磁场的相互作用来再现观测到的扰动。
