The sound so loud that it circled the earth four times

[Aijan]

On 27 August 1883, the Earth let out a noise louder than any it has made since. It was 10:02 AM local time when the sound emerged from the island of Krakatoa, which sits between Java and Sumatra in Indonesia. It was heard 1,300 miles away in the Andaman and Nicobar islands (“extraordinary sounds were heard, as of guns firing”); 2,000 miles away in New Guinea and Western Australia (“a series of loud reports, resembling those of artillery in a north-westerly direction”); and even 3,000 miles away in the Indian Ocean island of Rodrigues, near Mauritius* (“coming from the eastward, like the distant roar of heavy guns.”)

(...)

A barometer at the Batavia gasworks (100 miles away from Krakatoa) registered the ensuing spike in pressure at over 2.5 inches of mercury. That converts to over 172 decibels of sound pressure, an unimaginably loud noise. 

 

 

 

http://nautil.us/blog/the-sound-so-loud-that-it-circled-the-earth-four-times

[maxmercy]

Real sounds will always be more impactful than anything we can generate in an HT.  And Krakatoa was estimated as the equivalent of 200 MILLION TONS of TNT going off at once.

 

JSS