Twice there have been record changes in atmospheric pressure over Greece during two passes of the shock wave caused by the huge underwater eruption of the Hunga Tonga-Hunga Haʻapai volcano in Tonga Pacific.
Initially, the meteorological stations of the National Observatory of Athens / meteo.gr recorded a sharp rise in atmospheric pressure in our country during the first arrival of the wave from the northeast in a southwesterly direction, with the meteorological stations of the Aegean pressure rise, and then within ten minutes the pressure dropped by about 2-5 hPa, depending on the region.
The wave, traveling southwest at speeds of more than 1,000 kilometers per hour, encountered the corresponding wave coming from the west. Their meeting sparked a contribution to southern Algeria, about the opposite diameter of the Earth from Tonga to Oceania. The result was his second crossing over Greece a few hours later, this time in a northeasterly direction. The motion of the wave was recorded by the European satellite Meteosat, as the sharp drop in atmospheric pressure causes water vapor to condense and it was possible to record clouds in the infrared range.
The study of the phenomenon is in progress and will continue for a better understanding of the recordings. Once again, according to meteo, the usefulness of the existence of a dense network of meteorological stations in our country, equal to large meteorological centers abroad, is proven.
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