WXforum.net
General Weather/Earth Sciences Topics => Weather Conditions Discussion => Topic started by: davidg_nz on January 15, 2022, 04:53:36 AM
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Don't know if this really belongs here as its not exactly weather but...
(https://fremont.zx.net.nz/~david/images/tonga_sw_sb.png) (https://fremont.zx.net.nz/~david/images/tonga_sw_hlz.png)
A bit over two hours after the volcano erupted in Tonga, around 1986km from Port Charles according to Google Maps. I never thought something like this would be picked up by a personal weather station before.
Edit:
Zoomed view of just the pressure surge:
(https://fremont.zx.net.nz/~david/images/tonga_sw_sb_zoom.png)
News is saying quite a few people even here in New Zealand over 2000km away heard the eruption (or its shockwave) as well.
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Not as dramatic but I also saw a blip in Northern Idaho.
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Waiting to see if Europe gets anything.
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Thanks for starting the thread!
Not as dramatic but I also saw a blip in Northern Idaho.
The same here in eastern Washington. Scanning WU you can see the blip and compare times with other stations. Very interesting.
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holy cow
8am central
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Netherlands!
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:shock: My weather station (Saratoga, CA, USA) recorded the shock wave from the #Tongaeruption this morning. The eruption is 5,313 miles (8550 km) away.
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will have to talk about this in class Monday
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I am fairly sure I also captured the event in Oregon... See attached.
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Blast Event is NOT the large bump, it is the yellow circle centered on the time.
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I was hoping to be able to detect a small effect, but this looks a lot like the graphs I saw this morning from locations much much closer. 3 hPa difference between leading edge of the blast and the back!
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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-)
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Got this up in the Cheshire area of the UK at 19:00 UTC...
I make it distance of around 10,000 miles, or 16,000 km.
EDIT: Updated to include the secondary event just before 02:00 UTC on the 16/01/22
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Tonga volcanic eruption took almost 10 hours to affected pressure in Minnesota when it erupted around 10PM CT on 1/14 and reached MSP at 8AM on 1/15.
https://twitter.com/NWSTwinCities/status/1482438444013916162
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I believe capture the pressure blip here on the east coast.
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Video Link from Space Weather:
https://spaceweathergallery.com/indiv_upload.php?upload_id=181596
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Got this in the Western Isles of Scotland last night:
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Two waves in fact - the first the one coming directly, the second presumably the one going the long way round!
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Second shockwave just around 2.30 UTC+1 here.
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Slight bump here in central Florida.
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Second shockwave just around 2.30 UTC+1 here.
Looks like mine caught both as well
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Hi
Picked up in Sydney Australia. Two screenshots from Weather Underground from two weather stations about 25 km apart. The timing is the same and matches the local weather bureau data.
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I watched it live on the computer. I was surprised where these quick changes in pressure came from, because it was freezing outside and almost no wind.
Davis VP2
(https://pogodarybnik.pl/obrazki/cisnienie%20cm1.png)
GW1000
(https://pogodarybnik.pl/obrazki/cisnienie%20cmx.png)
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I believe capture the possibly a second pressure blip here on the east coast. Weather was clear and temp was -3.0 f
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My WL.com data seems to show two separate times about 14 hours apart.
Enjoy,
Paul
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Four stations in the Boulder, Colorado area. The NREL campus to the south, the NCAR Mesa and Foothill Labs, and my station, at about 6:30 MST.
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10:30 ish in Eastern Ontario on the morning or 15th. [ You are not allowed to view attachments ]
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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?
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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!
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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
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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:
(https://fremont.zx.net.nz/~david/images/tonga/sb.png)
(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:
(https://fremont.zx.net.nz/~david/images/tonga/sb_17jan.png) (https://fremont.zx.net.nz/~david/images/tonga/hlz_17jan.png)
As a 30 minute average it appears as a bit of a sharp bump:
(https://fremont.zx.net.nz/~david/images/tonga/sb_30m.png) (https://fremont.zx.net.nz/~david/images/tonga/hlz_30m.png)
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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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 (https://twitter.com/metoffice/status/1482605906659622914?s=20)
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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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(https://frankfortweather.us/stuff/tonga_frankfort.png)
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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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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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It appears my PWS picked it starting about 05:00 (UTC-7)
(https://blogger.googleusercontent.com/img/a/AVvXsEiuzaxn7ZhWxmZL9oi7WCxccojcZvAlDoXBt0RRabcS4B7qGzggz3ESDv-TVjfbv-SUyXqkOfzweeDDHdcls2UMCDjckwNc8aIkvRb8yE1f7Vx440y7Ul8r83KD8QF8BC9vkvhWIKd4QsbYcLAZUtvG95dM3jeFDffAAOzl5at3-rZ-ODxABO4rMBOhWg=w640-h320)
Tonga Vocano pinned red
(https://blogger.googleusercontent.com/img/a/AVvXsEjqxboh53eNeeNk3NRXTVWq1L8Np6DLvEWzA-zGZER_FjxtJPdKVbTbCBedERDN9PaNnG3M7XvCWT0s_Cr3cG7FYK6wbj0JJvi_FqKNWQaPYIDGjvNw3X1znvubZuI0ZP8sC9k571AfNNq_ODV5PWbN0W96AMNTkeCdjDU-9Ne8gyrPI1fPcDrn1BlwKQ=w640-h470)
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And Davis is laying claim to it ;) https://www.davisinstruments.com/blogs/news/your-davis-station-saw-the-tonga-volcano-shockwaves?mc_cid=9cf841ae17&mc_eid=907f4a847b (https://www.davisinstruments.com/blogs/news/your-davis-station-saw-the-tonga-volcano-shockwaves?mc_cid=9cf841ae17&mc_eid=907f4a847b)
Enjoy,
Paul
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Nice informational video about the Tonga volcano. Although towards the end it strays from the subject matter.
https://www.youtube.com/watch?v=sZZVVwqZ0rs (https://www.youtube.com/watch?v=sZZVVwqZ0rs)
There’s a very good channel called GeologyHub that has several videos about the volcano, plus more.
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And Davis is laying claim to it ;) https://www.davisinstruments.com/blogs/news/your-davis-station-saw-the-tonga-volcano-shockwaves?mc_cid=9cf841ae17&mc_eid=907f4a847b (https://www.davisinstruments.com/blogs/news/your-davis-station-saw-the-tonga-volcano-shockwaves?mc_cid=9cf841ae17&mc_eid=907f4a847b)
Enjoy,
Paul
The "moments later" regarding the tsunami that hit Peru was an ouch.
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Also seen in Donauwörth
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