Author Topic: Shockwave from volcano  (Read 1369 times)

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Online davidmc36

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Re: Shockwave from volcano
« Reply #25 on: January 16, 2022, 01:07:24 PM »
10:30 ish in Eastern Ontario on the morning or 15th. [ You are not allowed to view attachments ]

Offline Bashy

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Re: Shockwave from volcano
« Reply #26 on: January 16, 2022, 05:51:56 PM »
Can't figure out how to take a screen shot of my graph, but my pressure went form 30.177" at 1140Z to 30.221" at 1220Z then dropped back down. Very reminiscent of a pressure wave associated with a T-storm outflow.  8)

If on the PC/lappy, try, Windows button + Shift + S, then draw a box around item, then save or you can just paste it into certain media...

My station too recorded it here in, Norfolk, UK, amazing, is that an aftershock an hour or so later?
« Last Edit: January 16, 2022, 05:54:38 PM by Bashy »
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Offline CW2274

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Re: Shockwave from volcano
« Reply #27 on: January 16, 2022, 06:00:26 PM »
Can't figure out how to take a screen shot of my graph, but my pressure went form 30.177" at 1140Z to 30.221" at 1220Z then dropped back down. Very reminiscent of a pressure wave associated with a T-storm outflow.  8)
If on the PC/lappy, try, Windows button + Shift + S, then draw a box around item, then save or you can just paste it into certain media...
No matter what I tried, no joy. I did it once before, but spaced how I did do it. I'll try this. Thanks!

Offline Bashy

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Re: Shockwave from volcano
« Reply #28 on: January 16, 2022, 06:11:02 PM »
Can't figure out how to take a screen shot of my graph, but my pressure went form 30.177" at 1140Z to 30.221" at 1220Z then dropped back down. Very reminiscent of a pressure wave associated with a T-storm outflow.  8)
If on the PC/lappy, try, Windows button + Shift + S, then draw a box around item, then save or you can just paste it into certain media...
No matter what I tried, no joy. I did it once before, but spaced how I did do it. I'll try this. Thanks!

Its called the windows sniping tool, the other way to do is is Print Screen button or "prt sc", then open paint, and then just either paste it in or click CTRL V, then crop what ya need, ya may need to resize for places like here due to file size limit
Kind regards
Bashy

Offline davidg_nz

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Re: Shockwave from volcano
« Reply #29 on: January 16, 2022, 07:16:31 PM »
Its been long enough that if the shockwave was going to make it all the way around the world it should have done so by now and this morning the barometer was doing something a little odd:

(highlighted data is the right-most peak - I should have highlighted it in the chart)

Both stations show it though the Hamilton one (142km southwest, inland) to a lesser extent. There are the remains of cyclone Cody passing east of New Zealand but according to MetService was "well to the east" of here at 7am so perhaps this is is the shockwave coming back around:


As a 30 minute average it appears as a bit of a sharp bump:


So I guess the shockwave managed to go all the way around the world? Or it could be nothing I suppose - I don't think I've ever looked this closely at the barometer before.
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Offline hofpwx

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Re: Shockwave from volcano
« Reply #30 on: January 16, 2022, 10:10:43 PM »

The pressure wave from the 1883 Krakatoa eruption propagated around the globe six or seven times, measurably.

The plot in this tweet from the UK Met Office is amazing. Wish I'd set my recording frequency higher beforehand. Oh well.


https://twitter.com/metoffice/status/1482605906659622914?s=20
« Last Edit: January 16, 2022, 10:15:11 PM by hofpwx »

Offline hmderek

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Re: Shockwave from volcano
« Reply #31 on: January 17, 2022, 03:03:43 AM »
So I'm looking at my data, wondering if I have detected or will detect anything the second time around. If the wave would have continued at the same speed, I'd expect a result around 05:0007:00 UTC here, which is about right!

I am thinking this spike might be something. 2 hours late, but a 1.2 hPa jump during 20-30 minutes. Afterwards it drops back 1 hPa in 15 minutes. If the pressure wasn't already rising, I'm guessing the drop would have been more.

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« Last Edit: January 17, 2022, 03:41:08 AM by hmderek »
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Offline Cutty Sark Sailor

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Re: Shockwave from volcano
« Reply #32 on: January 19, 2022, 03:53:28 PM »
 

Online davidefa

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Re: Shockwave from volcano
« Reply #33 on: January 19, 2022, 05:24:59 PM »
Can't believe my station recorded this event ( reported at 4:10utc ):
- first peak at 20:01 utc distance traveled 17300Km, delta t 15:51, speed 1091Km/h
- second peak at 00:55utc, distance traveled 22775, delta t 20:45, speed 1097Km/h

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« Last Edit: January 19, 2022, 05:50:38 PM by davidefa »

Offline ocala

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Re: Shockwave from volcano
« Reply #34 on: January 29, 2022, 06:23:35 AM »
Nice informational video about the Tonga volcano. Although towards the end it strays from the subject matter.
https://www.youtube.com/watch?v=sZZVVwqZ0rs
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Offline Randall Kayfes

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Re: Shockwave from volcano
« Reply #35 on: February 01, 2022, 02:47:38 PM »
It appears my PWS picked it starting about 05:00 (UTC-7)



Tonga Vocano pinned red

« Last Edit: February 01, 2022, 02:49:28 PM by Randall Kayfes »



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Offline hofpwx

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Re: Shockwave from volcano
« Reply #37 on: February 01, 2022, 05:21:25 PM »
Nice informational video about the Tonga volcano. Although towards the end it strays from the subject matter.
https://www.youtube.com/watch?v=sZZVVwqZ0rs


There’s a very good channel called GeologyHub that has several videos about the volcano, plus more.

Offline hofpwx

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Re: Shockwave from volcano
« Reply #38 on: February 01, 2022, 09:30:20 PM »

Offline Wooks61

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Re: Shockwave from volcano
« Reply #39 on: February 03, 2022, 12:32:58 PM »
Also seen in Donauwörth

Offline Wooks61

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Re: Shockwave from volcano
« Reply #40 on: February 03, 2022, 12:40:13 PM »
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