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Shockwaves from Tonga’s volcanic eruption reverberate around the world

Weathernews Inc. has confirmed high-density observational data of sudden atmospheric pressure changes, believed to be due to the large-scale volcanic eruption near the Tonga archipelago, by its proprietary Soratena weather sensors. which are installed in approximately 3,000 locations across Japan. It freely shares atmospheric pressure observational data for the elucidation of relevant mechanisms by researchers around the world.

Temporary changes in atmospheric pressure were observed over a wide area due to the large-scale Hunga Tonga-Hunga Ha’apai eruption near the Tonga archipelago around 1:00 p.m. on January 15, 2022 (Japan time). Changes in atmospheric pressure observed by Soratena around 8:00 p.m. on January 15 are thought to be attributable to shock waves, or air vibrations, caused by the eruption.

Additionally, similar changes in atmospheric pressure were observed around 9:00 a.m. on the 17th, indicating the possibility that the vibration of the air had circled the earth and returned to Japan.

A satellite image shows the SO2 cloud from the Hunga-Tonga-Hunga-Ha’apai volcano crossing the Pacific on January 17, 2022. Courtesy of the European Union, Copernicus Sentinel-5P imagery processed by @DEFIS_EU/Handout via REUTERS

Soratena is an exclusive weather sensor that observes atmospheric pressure, temperature, humidity and three other elements every minute. Installed at approximately 3,000 locations across Japan, the sensors form the country’s largest high-density observation network.

Weathernews hopes that using its observational data in research will help elucidate phenomena such as tsunami occurrence and air vibrations from eruptions.

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Sudden atmospheric pressure changes due to shock waves from Tonga volcanic eruption confirmed

News weather’ Soratena weather sensors observed sudden changes in atmospheric pressure across Japan on January 15, 2022, from 8:00 p.m. to just after 9:00 p.m. (JST). They are believed to have been caused by shock waves, or air vibrations, from the Hunga Tonga-Hunga Ha’apai eruption in the outskirts of the Tonga archipelago around 1:00 p.m. the same day, 15 January.

Soratena’s observations indicate an increase in atmospheric pressure followed immediately by a decrease, with the changes propagating in a concentric circle. The changes captured are likely the compression (increase in atmospheric pressure) and decompression (decrease in atmospheric pressure) characteristic of shock waves and are an indication of the magnitude of the volcanic eruption.

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The circle of air vibrations around the Earth will return on January 17

Atmospheric pressure changes were again observed across Japan on January 17, from shortly before 9:00 a.m. to shortly after 10:00 a.m.

Data from Soratena indicates that atmospheric pressure rises and then immediately falls, progressing in concentric circles from the southeastern side of the Japanese archipelago, including the Kanto region and the Izu Islands. Observed pressure changes were around 2 hPa on January 15, while even the most significant changes observed were only around 1 hPa on January 17.

The atmospheric pressure changes are thought to be attributable to shock waves from the January 15 eruption, which may have circled the earth and returned shortly before 9:00 a.m. on January 17. The timing essentially coincides with the expectation that the shockwaves will occur. back to Japan around 9:00 a.m. on January 17 after circling the earth, assuming their speed remains constant.

Additionally, vibrations of air flowing around the earth in the opposite direction would have passed through Japan around 5:00-6:00 p.m. on January 16, causing minute changes in atmospheric pressure to be observed during this period.

Atmospheric pressure data from Soratena meteorological sensors are made available for research

According Professor Fumihiko Imamura of the Tohoku University International Institute for Disaster Researchit is possible that air vibrations from the large-scale volcanic eruption in Tonga triggered and amplified the tsunami in Japan and other pan-Pacific regions.

Weathernews provides atmospheric pressure observational data from Soratena weather sensors, free of charge for research purposes only, so that it can be used effectively in studies related to the elucidation of various phenomena as well as prevention disasters. Researchers interested in accessing the data are encouraged to contact Weathernews via the Application formclearly stating how they intend to use the data.

Author: Weather News