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A volcanic eruption sent enough water vapor into the stratosphere to cause a rapid change in chemistry
by Chelsea Thompson and Theo Stein
The eruption of the Hunga Tonga-Hunga Ha'apai volcano on 15 January 2022 produced the largest underwater explosion ever recorded by modern scientific instruments, blasting an enormous amount of water and volcanic gases higher than any other eruption in the satellite era.

NOAA scientists link exotic metal particles in the upper atmosphere to rockets, satellites
by Chelsea Thompson and Theo Stein
NOAA scientists investigating the stratosphere have found that in addition to meteoric 'space dust,' the atmosphere more than seven miles above the surface is peppered with particles containing a variety of metals from satellites and spent rocket boosters vaporized by the intense heat of re-entry.
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