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: Tonga volcanic eruption was so powerful that it caused Earth’s atmosphere to ring like a bell #IndiaNEWS The Hunga Tonga-Hunga Ha’apai eruption reached an explosive crescendo on January 15. Its

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Tonga volcanic eruption was so powerful that it caused Earth’s atmosphere to ring like a bell #IndiaNEWS
The Hunga Tonga-Hunga Ha’apai eruption reached an explosive crescendo on January 15. Its rapid release of energy powered an ocean tsunami that caused damage as far away as the US West Coast, but it also generated pressure waves in the atmosphere that quickly spread around the world.The atmospheric wave pattern close to the eruption was quite complicated, but thousands of miles away it appeared as an isolated wavefront travelling horizontally at over 650 miles an hour as it spread outward.The National Aeronautics and Space Administration’s James Garvin, the chief scientist at the Goddard Space Flight Center, told NPR the space agency estimated the blast was around 10 megatons of TNT equivalent, about 500 times as powerful as the bomb dropped on Hiroshima, Japan, during World Word II. From satellites watching with infrared sensors above, the wave looked like a ripple produced by dropping a stone in a pond.The pulse registered as perturbations in the atmospheric pressure lasting several minutes as it moved over North America, India, Europe and many other places around the globe. Online, people followed the progress of the pulse in real-time as observers posted their barometric observations to social media. The wave propagated around the whole world and back in about 35 hours.Fascinating depiction of the pressure wave associated with the Tonga...Read more


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