This may have been the loudest noise on earth since Krakatoa in the 1880s

 The blast was heard as far away as Alaska and was probably one of the loudest events to occur on Earth in over a century, according to Michael Poland, a geophysicist with the U.S. Geological Survey.

"This might be the loudest eruption since [the eruption of the Indonesian volcano] Krakatau in 1883," Poland says. That massive 19th-century eruption killed thousands and released so much ash that it cast much of the region into darkness.

In the case of this latest event, Garvin says that he believes the worst may be over — at least for now.

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https://www.npr.org/2022/01/18/1073800454/nasa-scientists-estimate-tonga-blast-at-10-megatons