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Heard nothing in Sydney Australia .. so I wouldn't count on hearing it from SF.


I live in the Yukon Territory, Canada... Not 100% sure this explosion is what woke me this morning but:

I woke up at 7:15 AM MST to what I though was a freight truck loading boxes at the business next door. Rumbling, thudding noises. Very faint. Promptly ignored it and tried to go back to sleep, a few moments later my sister 100 KM outside of my location on a off-grind property texted me asking if I could hear thunder/fireworks like noises outside. Noise probably lasted 10-15 minutes.

I did some napkin math for speed of sound and it gets close.

--------------

9,700 KM distance Tonga - Whitehorse, YT

1,225 Km/hr speed of sound @ 20C

~7.9 Hrs to get here

3:10 PM AEDT Saturday 1st Explosion - 9:10 PM MST Friday + 8 Hrs = 5:10 MST Saturday

5:26 PM AEDT Saturday 2nd Explosion - 11:26 PM MST Friday + 8 Hrs = 7:26 AM MST Saturday


Accounting for inaccuracy, temperature changes along the way, wave diffraction, etc., I'd say you heard it.


It was heard easily in North America:

> The eruption of the Hunga Tonga-Hunga Haʻapai volcano was heard across the South Pacific, and eventually as far away as the US.

https://www.bbc.com/news/world-asia-60007119


It was heard in NZ, some as south as Christchurch claiming to have heard it. In in Christchurch and didn't hear it but did see changes in air pressure was the sound waves went through.




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