Tonga volcanic eruption shock wave

[Eight8Victor]

 

[Nokomis449]

WOW That is really cool to see!

[N9405V]

The satellite images are pretty amazing…

https://www.space.com/amp/tonga-volcano-eruption-satellite-photos


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[EricJ]

I have a little weather station in my yard.   I got a pressure bump at about that time.

[carusoam]

The satellite images give a real interesting image of how powerful this event was…

The tsunami it caused spread around the pacific and arrived on the west coast, greatly reduced…

The air pressure wave is also interesting as the data showed a wave crossing the US…

Really cool to see Eric’s data above, confirming the bump!

Best regards,

-a-

[0TreeLemur]

@Eight8Victor what a cool visualization of a wave traveling across the continent at the speed of sound.  According to the viz. the peak of the wave arrived at Sacramento at 1200Z, and traveled 2000 nm arriving at Washington, D.C. at 1510Z.   Giving a speed of 630 knots.   A bit slower than the speed of sound at STP because of colder than standard air I'd guess.  Thanks for posting!

I read this morning that folks in Alaska heard the explosion.

[cliffy]

On 1/17/2022 at 11:28 AM, 0TreeLemur said:

@Eight8Victor what a cool visualization of a wave traveling across the continent at the speed of sound.  According to the viz. the peak of the wave arrived at Sacramento at 1200Z, and traveled 2000 nm arriving at Washington, D.C. at 1510Z.   Giving a speed of 630 knots.   A bit slower than the speed of sound at STP because of colder than standard air I'd guess.  Thanks for posting!

I read this morning that folks in Alaska heard the explosion.

Nice math Thanks

[jaylw314]

On 1/17/2022 at 10:28 AM, 0TreeLemur said:

@Eight8Victor what a cool visualization of a wave traveling across the continent at the speed of sound.  According to the viz. the peak of the wave arrived at Sacramento at 1200Z, and traveled 2000 nm arriving at Washington, D.C. at 1510Z.   Giving a speed of 630 knots.   A bit slower than the speed of sound at STP because of colder than standard air I'd guess.  Thanks for posting!

I read this morning that folks in Alaska heard the explosion.

Speed of sound would faster in colder air, right?

[0TreeLemur]

3 hours ago, jaylw314 said:

Speed of sound would faster in colder air, right?

You would think so, but nope, slower.  This is because the air molecules are bumping into each other less frequently at colder temperatures.  

Nerd alert.  https://www.grc.nasa.gov/www/k-12/airplane/sound.html