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Posted by:
28degrees
Posted:
Tuesday, 18 January 2022 11:17:47 AM(UTC)
There's a mention here for today Tuesday 18/1/2022. Check the archives on the right for 15/1 and see the eruption just on nightfall.
https://spaceweather.com/
VOLCANIC SHOCKWAVE RIPPLES ACROSS NORTH AMERICA: If you have a backyard weather station, you might have detected this weekend's volcanic eruption near Tonga. The undersea blast hurled a plume of sulfurous ash all the way to the stratosphere. Satellite videos show an atmospheric shockwave expanding on all sides of the plume.
Astronomer Matt Penn and colleagues decided to investigate further. "We plotted the times of barometric pressure peaks from 150 backyard weather stations available on Weather Underground," he explains. This movie sequence shows the data they found:
Live image
Credit: Claude Plymate, Mike Conley, Geri Hall-Conley, Jonathan Mangin and Matt Penn
"White dots mark the arrival of the shock wave during the five hour interval 11:30 UT to 16:30 UT," explains Penn. "There were some very large amplitude differences! We clearly saw that the wave was severely reduced by crossing the Rockies. I think it would be very interesting to look at a smaller region, measure amplitudes, and track the reduction as the wave moves from California through the Rockies and onto the Great Plains. There is a gold mine in the Weather Underground data set."
"We looked at only 150 sites," Penn continues. "There are thousands of sites that show the pressure wave and lots of cool science projects that could be done. I hope this inspires more people to take a look!"
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