ice-is-forming
let me rephrase that... Fuck off
Well shit, a cyclone two weeks ago, record breaking floods last Saturday & today it's a tsunami warning 
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Volcano and Earthquake watch
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Pickman's model
Starry Wisdom
Never a dull momentWell shit, a cyclone two weeks ago, record breaking floods last Saturday & today it's a tsunami warning
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ice-is-forming
let me rephrase that... Fuck off
When I was a kid I had this fantasy about being rich enough to invent a weather room. A bit like the wardrobe to narnia. I love weather!
99% of the time the weather here is wonderful, perfect climate but it gets dull. You wake up & it's another nice day.. so I always like a bit of weather but a tsunami warning!!!
99% of the time the weather here is wonderful, perfect climate but it gets dull. You wake up & it's another nice day.. so I always like a bit of weather but a tsunami warning!!!
ice-is-forming
let me rephrase that... Fuck off
And I, I live by the ocean! I think its a marine warning & Fraser island protects us a fair bit. I'm not sure what a marine warning is, assuming it's for shipping
StoneRoad
heckling from the back!
Logically, I would think a marine warning is basically to tell shipping to keep out of shallow water / ports & harbours ...
... plus telling people to keep out of low-lying areas on or connected to the coast.
[I'm speculating as I don't normally look at the Oz Met Office]
ice-is-forming
let me rephrase that... Fuck off
Yeah for shipping & stay out of the ocean. This town is immediate forshore, although k'gari will bear the brunt of it.
ferrel_hadley
New Member
GEOS West
brogdale
Coming to terms with late onset Anarchism
That pressure wave!GEOS West
Crispy
The following psytrance is baṉned: All
There's a video from Japan where a medium-sized boat is motoring hard to get out of harbour and just squeaks past the breakwater as the tsunami arrives. It sail on harmlessly, while the harbour/marina behind it gets absolutely wrecked.
brogdale
Coming to terms with late onset Anarchism
Some useful scale information here:
Tonga: Size of eruption put into perspective (InfoGraphics & Maps)
ice-is-forming
let me rephrase that... Fuck off
From that link 
Storm Fox
Trying the find the next noun to verb
From https://spaceweathergallery.com/indiv_upload.php?upload_id=181596
Wow.
I didn't see anything on my weather station, not surprising, but the Kataoka Eruption pressure wave went around the world three times.
Wow.
I didn't see anything on my weather station, not surprising, but the Kataoka Eruption pressure wave went around the world three times.
Storm Fox
Trying the find the next noun to verb
Just to give an update we did get the shockwave!!!
It's only 2mb but this is from a Volcano pretty much half a world away. I'm 90% sure this is caused by the eruption. I checked other sites on www.wunderground.com and the other sites all over the country seem to show a similar event and looking at the timing it came down from Scotland, which I assume is because of pressure waves been uninterrupted across the polar icecap
It's only 2mb but this is from a Volcano pretty much half a world away. I'm 90% sure this is caused by the eruption. I checked other sites on www.wunderground.com and the other sites all over the country seem to show a similar event and looking at the timing it came down from Scotland, which I assume is because of pressure waves been uninterrupted across the polar icecap
farmerbarleymow
I'm Petee's spirit animal
Looks like the Earth has farted.From Shockwave By Near-Tonga Eruption Captured From Himawari Satellite
View attachment 306090
Wow.
I didn't see anything on my weather station, not surprising, but the Kataoka Eruption pressure wave went around the world three times.
StoneRoad
heckling from the back!
Not so bad out at sea, if you can get the bows into the oncoming wave(s) - like riding a roller-coaster !
What's dodgy - too shallow water and being sideways [beam on] to waves.
Just imagine that wave coming ashore somewhere unprotected ... and it would be pushed up higher than that as it comes ashore.
StoneRoad
heckling from the back!
Sorry, I wasn't trying to be patronising.
Some deep water tsunami waves can be huge - it is just that no-one sees them. Although there are quite a few monitoring buoys in the Pacific and elsewhere that do notice these ... and they trip the warnings.
Deep-ocean Assessment and Reporting of Tsunamis - Wikipedia
2hats
Dust.
Saw it in London on a small environmental monitor in my lounge earlier this evening. Judging from the timestamped Himawari visual imagery that's about 15 hours travel time via a great circle route of around 16600km which works out just over 300 m/s - not too far off the typical speed of sound in the upper troposphere (ie it is a signal from the event in question allowing for a degree of dispersion).
2hats
Dust.
Indeed. Also saw the long arc disturbance at around 0140UT here. Again, consistent with ~300 m/s in the upper troposphere so highly unlikely to have been anything but the atmospheric shock front signal coming the 'long way' round.
PS Panic in Norfolk: "huge jumps in atmospheric pressure last night".
www.norfolklive.co.uk
PS Panic in Norfolk: "huge jumps in atmospheric pressure last night".
Hunga Tonga volcano eruption felt in Norfolk as atmospheric pressure surges
The eruption has travelled more than 10,000 miles
Storm Fox
Trying the find the next noun to verb
A couple of millibar in that time isn't large or that unusual even in that time scale, in fact the pattern looks similar to a passing squall line or large thunderstorm. What makes this the signal from the volcano is it can be tracked across the country and that there was no convective weather around.Indeed. Also saw the long arc disturbance at around 0140UT here. Again, consistent with ~300 m/s in the upper troposphere so highly unlikely to have been anything but the atmospheric shock front signal coming the 'long way' round.
PS Panic in Norfolk: "huge jumps in atmospheric pressure last night".
Hunga Tonga volcano eruption felt in Norfolk as atmospheric pressure surges
The eruption has travelled more than 10,000 miles
farmerbarleymow
I'm Petee's spirit animal
Probably the most exciting thing to happen in Norfolk since the dawn of time.Indeed. Also saw the long arc disturbance at around 0140UT here. Again, consistent with ~300 m/s in the upper troposphere so highly unlikely to have been anything but the atmospheric shock front signal coming the 'long way' round.
PS Panic in Norfolk: "huge jumps in atmospheric pressure last night".
Hunga Tonga volcano eruption felt in Norfolk as atmospheric pressure surges
The eruption has travelled more than 10,000 miles
2hats
Dust.
Indeed, hence my amusement at the level of "journalism" involved.
Nice visualisation of the atmospheric pressure signal sweeping over Japan:
Google Translation said:
Notable for also creating a meteotsunami - a separate atmospherically forced tsunami wave as well as the, more widely known, seismically driven one. A small one (amplitude ~10cm) seen across the Caribbean (perhaps ideal circumstances there - water depth and prevailing weather). Here in Puerto Rico:
and also Martinique, Dominica and Saint Lucia:
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