Shock wave from an underground volcano: why pressure in Moscow jumped extremely

Network analyst Alexey Nadezhin recorded an anomalous surge and decline in air pressure in Moscow at 21:23 on January 15 on his sensor. It turned out that the cause of this phenomenon is the eruption of the Hunga-Tonga-Hunga-Khapaai underwater volcano on the territory of the Pacific island kingdom of Tonga.

Later, at 5:22 a.m. on January 16, another burst from the blast wave was recorded on the sensor on the "People's Monitoring", on the narodmon website - this is where enthusiasts post data from their sensors.

The same fluctuation is on other sensors around Moscow. If we compare all the readings, it turns out that the wave swept from east to west.

Вот как выглядел всплеск давления на Камчатке (время на всех графиках Московское, UTC+3).

К 20 часам МСК волна докатилась до столицы Казахстана.

В районе 21 часа волна прошла Москву, а к 22 доехало и до Дублина (западнее датчиков на narodmon уже не нашлось).

In the video, you can see two shock waves, both of them reached Moscow at different times - one in the evening, the other in the morning. This is such a small, it turns out, our Earth...