Earlier it was noted that the sonic boom was heard in Alaska according to the NWS. That is crazy.
But it can happen, it is very rare but sound travels and there really isn't much between Tonga and Alaska (like a huge mountain range above the water) to stop it.
From a much longer article which can be read at the link:
Experts believe anyone within 10 miles of the eruption was rendered completely deaf.
allthatsinteresting.com
The 1883 Krakatoa Eruption: The Explosion Heard Round The World And The Loudest Sound Ever
By Katie Serena | Checked By Leah Silverman
Published
May 18, 2019
Updated
March 5, 2021
The earthquakes, weather events, and tsunamis caused by the Krakatoa eruption of 1883 were felt even thousands of miles away.
Library of CongressThe Krakatoa eruption of 1883 is considered the loudest sound ever.
On the morning of August 26, 1883, the residents of the island of Krakatoa in the Sunda Strait of Indonesia, then-Dutch East Indie, arose like it was any other day. They went about their business as smoke trailed from the three volcanic cones that dotted the island. The smoke was new, but not unusual, as the island was made up of three active volcanoes. While it was a cause for pause, for many residents, it was no cause for alarm.
www3.nhk.or.jp
