[HN Gopher] Large Eruption Near Tonga, Heard in NZ. Tsunami at T...
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Large Eruption Near Tonga, Heard in NZ. Tsunami at Tonga and Fiji
Author : ggm
Score : 746 points
Date : 2022-01-15 07:42 UTC (15 hours ago)
(HTM) web link (earthquake.usgs.gov)
(TXT) w3m dump (earthquake.usgs.gov)
| The_rationalist wrote:
| Are there similar satellite imagery for the probably much bigger
| explosion that was krakatoa?? If no why..
| wolfram74 wrote:
| The big krakatoa eruption wiki lists was 1883[0], while
| tsiolkovsky was doing some theory by then, nobody was building
| satellites.
|
| [0]https://en.wikipedia.org/wiki/Krakatoa
| totaldude87 wrote:
| Not sure someone else shared this , but this looks scary
|
| https://www.reddit.com/r/gifs/comments/s4imrz/tongas_hunga_t...
| Nitrolo wrote:
| Does anyone with knowledge about volcanoes have context on how
| big this is? Clearly not small, but is this a once-in-a-decade or
| a once-in-a-lifetime size explosion? Are there any well-known
| eruptions to compare it to (e.g. Mount St. Helens)?
| hugh-avherald wrote:
| It's unknown precisely (still erupting), but it's probably not
| even the largest eruption in the last few months.
| miedpo wrote:
| Not a volcanologist here but I've always loved volcanoes.
|
| It's probably gonna depend on how long it keeps erupting.
| Volcanic eruptions are rated (VEI index) on volume of material
| ejected, but each level has 10x more material than the
| previous.
|
| If this were a volcano on land... I'd guess we are at a 4 or
| so. As this is a volcano that just barely breached the surface
| and thus interacts with water alot... maybe a 3? Volcanoes like
| this create really violent explosions (like the ones heard
| yesterday), but that doesn't necessarily require more material.
|
| As said though, it'll be hard to tell without knowing how long
| the eruption went on and seeing the state of the island.
| Robotbeat wrote:
| Probably between VEI 4 and 6 inclusive.
|
| https://en.m.wikipedia.org/wiki/Volcanic_Explosivity_Index
| hliyan wrote:
| It is believed that the mystery eruption of 1808 originated
| in the same area.
| https://en.wikipedia.org/wiki/1808_mystery_eruption
| pkdpic wrote:
| > A tsunami advisory is in effect Saturday morning for the West
| Coast, including coastal California and parts of the San
| Francisco Bay Area, after a large underwater volcanic eruption
| near the Tonga Islands Friday night.
|
| The National Weather Service said peak waves of one to two feet
| are possible from the event.
|
| [from sfgate]
| https://www.google.com/amp/s/www.sfgate.com/bayarea/amp/Tsun...
|
| Just in case anyone with family in sf was wondering.
| quantumfissure wrote:
| Really, unbelievably cool satellite images. I don't know much
| about satellite imagery, is Himawari-8 always pointed to that
| area in the Pacific, or did we expect it to explode and was
| purposefully pointed towards the island?
|
| Here's what I honestly worry about: queue the conspiracies, "New
| islands don't just explode like that! That's the Fauci-Gates
| COVID-5G nuclear testing site sheeple!"
|
| ...cause Krakatoa definitely never happened.
| twic wrote:
| It's in a geostationary orbit at 140.7 degrees east, roughly in
| line with the east coast of Japan, and about 35 degrees west of
| the volcano, so it always has the volcano in view. It has an
| imaging sensor which continuously scans the whole visible disc
| of the earth, taking ten minutes to do so [1]. So, you get
| pictures of anything that happens, anywhere!
|
| [1] http://www.jma.go.jp/jma/jma-
| eng/satellite/news/himawari89/h...
| _Microft wrote:
| Yes, Himawari-8 is a geostationary satellite over longitude
| 140deg east and always pointed there. The Wikipedia article
| contains images of the full disk of Earth that it is observing.
| Since it is geostationary, the view does not change.
|
| https://en.m.wikipedia.org/wiki/Himawari_8
| fguerraz wrote:
| I actually quite like the "zoomed-out" version, it really shows
| the scale of the event. Look at the bottom right quadrant of this
| video:
|
| https://earth2day.com/TheWall/Movies/HIMAGLOBAL36h.html
|
| Big thanks to earth2day again!
| tgbugs wrote:
| It looks like there was another eruption in a volcano north
| east of there the day before?
| ByThyGrace wrote:
| The expansion of the shockwave there is almost like running a
| race against the terminator, but not quite as fast. Amazing.
| dredmorbius wrote:
| Wikipedia's article on the topic should be a good onging /
| updated summary of the event:
|
| https://en.wikipedia.org/wiki/2022_eruption_of_Hunga_Tonga
| r721 wrote:
| >Incredible footage has emerged of the Hunga-Tonga-Hunga-Ha'apai
| volcano erupting sending ash, steam and gas 20 kilometres into
| the air.
|
| https://www.facebook.com/couriermail/videos/479475316908812/
| peter303 wrote:
| Normally Tsunami algorithms start calculating/warning when there
| is M7 or higher. As an "airquake" the registered magnitude is
| negligible.
| bigyellow wrote:
| jcranmer wrote:
| Volcanic eruptions have climatic effects on short timescales--
| think a few years of maybe ~0.5degC cooling (this is going by
| Pinatubo's eruption ~30 years ago).
| schainks wrote:
| It looks like measurements are still ongoing, be patient.
| dylan604 wrote:
| Yes, you are right, nobody except you has ever thought about
| the events of volcanism on the climate.
|
| Where in the world do you think that this has never been
| discussed? What goes on in your thought processes that suggests
| this?
| Kelamir wrote:
| I think you have a point there, but it could sound less
| condescending. It is really putting off. I personally don't
| think it leads to anything constrictive, only makes people
| feel worse about themselves.
| dylan604 wrote:
| Maybe, but to be honest, that was the re-edited dialed back
| version. The original post I replied was way to
| trollish/consipiracy pushing. "question no one else will
| ask" is just obvious attempt at a dog whistle, but instead
| grabbed the football ref whistle.
| Taniwha wrote:
| Pictures and videos here
|
| https://twitter.com/MichaelFieldNZ/status/148221531738882458...
|
| https://twitter.com/sakakimoana/status/1482218193619865600
|
| https://twitter.com/_TheSeaning/status/1482230175806992391
| cjnicholls wrote:
| Here is a satiliete view.
|
| https://twitter.com/US_Stormwatch/status/1482229220415721475...
| irthomasthomas wrote:
| Did they know this was coming? Or how did they manage to have
| the satellite centred over the volcano at the right moment?
|
| Edit: Found the answer, this was the second or third eruption
| from this volcano. So yeah they where already monitoring it.
| Amazing how they can manoeuvre these camera satellites now.
| pavelrub wrote:
| Satellites in general aren't maneuverable. The camera angle
| can be changed to point at, and capture, a region of
| interest when the satellite passes over it, but the
| satellite's orbit is determined on insertion and doesn't
| change on demand.
| temp0826 wrote:
| Exception of course being the X-37B spy "satellite"
| Symbiote wrote:
| Satellites can be moved, for example to avoid a collision
| with another satellite or debris, or to semi-permanently
| change the orbit. They have some sort of propulsion to
| allow this, and also counter atmospheric drag etc.
|
| However, the lifetime of the satellite is generally
| limited by the amount of propellant (or whatever), after
| it's run out the satellite is useless. So it's not done
| on a whim.
| alangibson wrote:
| Parent post is correct. Raising and lowering the orbit is
| a matter of burning a reasonable amount of rather limited
| fuel. But making a left hand turn at 17.5 km/h is
| incredibly energy intensive.
|
| Look at the SpaceX launch of DART. They needed a whole
| rocket to lift a tiny payload due to needing to turn
| roughly 45 degrees
| wrycoder wrote:
| https://blogs.nasa.gov/dart/2021/11/24/nasa-spacex-
| launch-da...
| pavelrub wrote:
| They have a very limited amount of hydrazine, used for
| small course corrections for drag compensation and debris
| avoidance. It's not used, nor can be used, to "change
| orbit" in the sense of redirecting the satellite to look
| at some specific location on demand, outside of the
| satellite's original orbit.
| numpad0 wrote:
| You just put one in a polar orbit and tell them to look
| at coordinates next time it is to pass that area over.
| Earth rotates under it meanwhile.
| sva_ wrote:
| Pretty sure these satellites from far away are all in
| geostationary orbit.
| JshWright wrote:
| The satellite wasn't maneuvered, and it was not
| specifically monitoring this location. It is a weather
| satellite that looks at half the planet at a time. This is
| just a crop of a much wider field of view.
| perihelions wrote:
| It's a weather satellite 36,000 km from Earth; half of the
| planet is contained in its field of view. Here, see:
|
| https://rammb.cira.colostate.edu/ramsdis/online/loop.asp?da
| t...
| irthomasthomas wrote:
| Is that the same as this though? https://mobile.twitter.c
| om/US_Stormwatch/status/148222922041...
|
| This looks to be zoomed way closer than your link, you
| can see small waves on the ocean etc. I did not think you
| could film the whole face of the earth at that
| resolution?
|
| Edit: Or are those small waves actually large clouds?
| chasd00 wrote:
| look like clouds to me but i'm not an expert in satellite
| imagery. the shockwave implies > the speed of sound so
| more of an explosion than eruption right?
| rpeden wrote:
| Many eruptions _are_ explosive[1], like Mount St. Helens
| in 1980. Here 's a small explosive eruption where you can
| see the shockwave and eventually hear it when it hits the
| ship the cameraperson is on:
| https://www.youtube.com/watch?v=BUREX8aFbMs
|
| [1]https://en.wikipedia.org/wiki/Explosive_eruption
| [deleted]
| jcrawfordor wrote:
| The two GOES satellites use the ABI (advanced baseline
| imager) to image a large portion of the total planet at a
| spatial resolution of around 1km. The GOES ABI design is
| influential on the broader world of weather satellites
| and many weather satellites operated by other countries
| (e.g. Japan's Himawari) use derived or similar imagers.
| GOES and Himawari are the premier weather imaging
| satellites of the US-allied world, collectively the two
| systems image a very large percentage of the total planet
| surface except extreme latitudes. Data from GOES and
| Himawari are fused to produce the global satellite images
| provided by e.g. NWS.
|
| The US Stormwatch image does seem to be cropped from
| Himawari. The size here may be deceptive, the spatial
| resolution is not as high as it looks because this cloud
| is so large.
|
| Although the GOES ABI (and related Himawari AHI) are
| static designs that image the full planet from a fixed
| position (i.e. there is no aiming or steering as is
| sometimes the case in other remote sensing satellites),
| they do deal with practical limitations related to
| readout and downlink capacity. As a result they typically
| produce a full-disk image every 5 minutes but both are
| capable of producing more frequent images of selected
| regions (areas of interest) on command. This capability
| is mostly used for maintenance purposes (e.g.
| registration calibration) rather than for weather
| observations.
|
| Incidentally NOAA is preparing to launch a new GOES
| satellite, GOES-T which will become GOES-18, in somewhat
| over a month. It is the same basic generation as GOES-16
| and GOES-17 currently in primary use, including the same
| basic ABI, but has a minor "bugfix" to the ABI design
| that will avoid a problem GOES-16 and GOES-17 have that
| requires them to go into a reduced readout rate mode some
| of the time for thermal management reasons.
|
| My basic meteorology knowledge is somewhat limited but I
| believe what appear to be waves are cirrus clouds. This
| is somewhat confirmed by their significantly increased
| prominence along the shockwave front, as large shockwaves
| in the atmosphere cause some additional formation of
| condensation clouds due to the increased pressure, and
| these tend to be cirrus up at high altitude (the
| condensation immediately freezes into small crystals).
| GekkePrutser wrote:
| Whoa that second link.. that guy is so lucky this didn't turn
| into a full blown tsunami.
|
| I don't think I'd like to live right at the coast if I were in
| the Pacific.
|
| But luckily it seems to be more of a slow eruption
| kzrdude wrote:
| Some of these communities have nothing but a coast!
|
| It's probably in a Jared Diamond book somewhere about
| shifting expectations depending on where you grow up, some
| people can't imagine that people live in a place where you
| can't hear the sea, because they only knew that.
| Someone wrote:
| Also, for those that have some high areas, chances are the
| high areas are a volcano. If it is, it likely is an active
| volcano, as this region is on the ring of fire
| (https://en.wikipedia.org/wiki/Ring_of_Fire)
| runeks wrote:
| > Whoa that second link.. that guy is so lucky this didn't
| turn into a full blown tsunami.
|
| That _is_ what a full blown tsunami looks like, based on
| watching many YouTube videos on the subject.
|
| Bear in mind this is only a minute of footage. If the water
| keeps coming in like that for an hour it will eventually
| reach the person shooting this video.
|
| The scary thing about tsunamis is that they look fairly
| innocent in the beginning. And five minutes later there's ten
| feet of water moving very fast with houses and cars in it.
|
| Here's a good example of how it can go from looking harmless
| to terrifying in 25 minutes: https://youtu.be/P8qFi74k2UE
| johnyzee wrote:
| Wow. Watching the people's attitude change, from puttering
| around in slippers joking about the first quaint little
| trickle, to full judgement day, within twenty minutes.
| mythrwy wrote:
| Wow! Someone else already mentioned it, but this so
| "interestingly unusual" to "apocalyptic" in twenty minutes
| it's hard to fathom. Thanks for sharing the link I
| personally had no idea!
| mannykannot wrote:
| The term 'tidal wave' has been deprecated for some time, as
| they are not gravity-driven, but it does capture how the
| wave does not just break on the shoreline like an ocean
| roller, it keeps on coming.
| jsrcout wrote:
| That's a sobering video. It doesn't look like much... at
| first. The power and violence of the water really has to be
| seen to be appreciated.
|
| Edited to add:
|
| On March 11, 2011, large parts of the city were destroyed
| by the tsunami which followed the Tohoku earthquake. The
| island of Oshima and its 3,000 residents, included in the
| city limits, was isolated by the tsunami which damaged the
| ferry connections.[7] After the tsunami, spilled fuel from
| the town's fishing fleet caught fire and burned for four
| days.[8] As of 22 April 2011, the city had confirmed 837
| deaths with 1,196 missing.[9]
|
| https://en.wikipedia.org/wiki/Kesennuma
| Taniwha wrote:
| This is a real tsunami, just not really really big, they are
| partially protected by a reef. It's not a slow eruption
| (check out the shockwave in one of the videos, heard in New
| Zealand). There was a smaller bang yesterday.
| perihelions wrote:
| Barometer data here:
|
| https://twitter.com/dbanksnz/status/1482249871566331908
|
| Roughly +/- 300 Pa pressure wave in New Zealand, about 2,000 km
| away.
| rz2k wrote:
| This is from two indoor BMP280 sensors on Home Assistant that
| are about 5300 miles from Tonga. (They are a floor apart from
| each other)
|
| It's amazing what extremely cheap sensors can currently
| measure, though 1883 technology was sufficient to measure the
| pressure wave from Krakatoa circling the globe multiple
| times.
|
| https://imgur.com/a/ydvDtkV
| r721 wrote:
| Also in this thread:
|
| https://twitter.com/IntelDoge/status/1482222778380177408
| dylan604 wrote:
| I wonder at what point the person shooting that footage
| starts to question their decision of not getting to higher
| ground than single story roof
| Taniwha wrote:
| It's worth noting that that cloud is (very) roughly 150km
| across
| divbzero wrote:
| What would be the timescale of those satellite videos? I
| imagine they must be time lapse videos?
| perihelions wrote:
| It has a 10-minute repeat rate (one frame); you can see the
| timestamps here,
|
| https://www.data.jma.go.jp/mscweb/data/himawari/
| sml156 wrote:
| Judging by the movement of the sun I would guess a couple of
| hours, It's hard for me to tell with all the clouds in the
| sky.
| https://twitter.com/_TheSeaning/status/1482230175806992391
|
| >What would be the timescale of those satellite videos?
|
| They are animated gif's just a bunch of frames from the
| original video.
| dredmorbius wrote:
| https://nitter.kavin.rocks/MichaelFieldNZ/status/14822153173...
|
| https://nitter.kavin.rocks/sakakimoana/status/14822181936198...
|
| https://nitter.kavin.rocks/_TheSeaning/status/14822301758069...
| dontbeabill wrote:
| sriram_sun wrote:
| From https://www.hawaiinewsnow.com/story/37334713/heres-the-
| diffe...
|
| "Tsunami Advisory Alert color: Orange
|
| When a Tsunami Advisory is posted, tsunami conditions in or near
| the water are expected. Under an advisory, strong ocean currents
| and/or waves with the potential to cause coastal damage are
| expected.
|
| The public should stay out of the water and away from beaches and
| coastlines."
| r721 wrote:
| Liveblog: https://www.rnz.co.nz/international/pacific-
| news/459618/live...
| noduerme wrote:
| Man. This has got to count as the largest explosion on earth
| within any of our lifetimes. Anyone got a figure on how much
| pulverized rock would have been displaced into the atmosphere had
| this taken place on dry land? How long a nuclear winter we'd be
| in for? Or how this compares to Krakatoa? From the imagery it
| seems orders of magnitude larger as a single explosion than all
| the nuclear weapons we ever detonated combined. That shock wave
| goes over Tonga within the first couple frames.
| 2OEH8eoCRo0 wrote:
| What length of time are these satellite videos taken? I think
| it might make the explosion look larger than it really is. What
| we are seeing is the billowing flat top of the debris cloud.
| 99_00 wrote:
| And fertilizer prices are already extremely high due to Nat gas
| shortages. Crop yeilds are going to be bad.
| s1artibartfast wrote:
| Unlikely to be that big. More like a once per year to once per
| decade eruption.
|
| If this is indeed a VEI4, Krakatoa would have been 100x bigger.
| Robotbeat wrote:
| It still remains to be seen exactly how big it is. My feel is
| it's slightly smaller than Mount Pinatubo in 1991 (in my
| lifetime) which significantly reduced global temperatures for a
| bit. Folks have suggested maybe 0.1 to 0.5C (0.2 to 1 degree F)
| temporary temperature reduction.
|
| Probably 4-6 on the VEI scale.
| https://en.m.wikipedia.org/wiki/Volcanic_Explosivity_Index
| bb123 wrote:
| I wonder if the debris this puts up into the atmosphere will
| help slow the effects of climate change
| colechristensen wrote:
| Possibly, but only briefly, highly dependent on the
| composition. Previous large explosions had measurable cooling
| effects for a year or two.
| Fordec wrote:
| They won't slow it, but pause effects for a short while. The
| CO2 would still be there afterwards and all the while
| increasing, the oceans will still be acidifying, etc.
|
| The next years after would still be as bad as predicted
| miedpo wrote:
| Probably not. Way to small for that, and even the early large
| eruptions only affect the atmosphere noticably for a year or
| two (unless it's a really really really crazy large eruption
| that makes Tambora look like tiny)
| noduerme wrote:
| It would... if it weren't underwater.
| Tepix wrote:
| Since the dec 20 2021 eruption it's been an island.
| noduerme wrote:
| dylan604 wrote:
| But did it just blow the top off of that island to put it
| back underwater?
| Tepix wrote:
| I think it has increased in size a lot. But i need to see
| the latest footage.
| jcims wrote:
| The cloud you see in the satellite image is in the
| atmosphere.
| bb123 wrote:
| Ah I didn't realise that. Thanks for clarifying.
| cyanydeez wrote:
| its theorized massive amounts or co2 wouod be released from
| yellowstone.
|
| more realistically, this would just cool for a few years,
| make climate denial easier to believe, then
| signficantlymrebound in amcoupke of years
| esahione wrote:
| colordrops wrote:
| Why do these sorts of comments always end in "bro"
| dylan604 wrote:
| because of course they do. it's like punctuation for
| "them". imagine a line graph as you are reading that
| comment. it starts high, but then starts to fail off
| quickly as you get to the second word picks up speed of
| its drop as you carry on. then, just to clean up
| everything, bro just plumments the graph to nil
|
| leopard can't change its spots, dude /s
| ani-ani wrote:
| They don't. If only it was that easy.
| Valmar wrote:
| That's a pretty awful hot take.
|
| Unless this is some terribly poor trolling, in which case
| I've taken your bait...
| tasha0663 wrote:
| Volcanic winter:
|
| https://en.wikipedia.org/wiki/Volcanic_winter
|
| The Year Without Summer:
|
| https://en.wikipedia.org/wiki/Year_Without_a_Summer
| noduerme wrote:
| Eh, that's what I was thinking too (except it's
| underwater). One good belch like this from Yellowstone and
| we'd be back in an ice age.
| maxerickson wrote:
| Aren't we still sort of in an ice age, in relative
| geologic terms?
|
| Okay, yes we are, with the popular usage of ice age
| referring to the last period when glaciers were much more
| dominant.
|
| https://en.wikipedia.org/wiki/Quaternary_glaciation
| bb123 wrote:
| Not sure what a hot take is. It was a a genuine question -
| volcanic eruptions have well documented climatic effects.
| noduerme wrote:
| It's kind of a compliment. "Hot take" is becoming common
| parlance, but a hot take as defined by Blind Boy
| Boathouse would be a connection you notice between two
| seemingly unrelated things, and then dive into to arrive
| at a smashing observation about, where you link those
| things by obsessively researching the connections between
| them, to reveal a hot take on events that no one has
| quite heard of, or had the same take on before.
|
| Check out this, maybe the great hot take of all time.
| https://play.acast.com/s/blindboy/pooanon
| reaperducer wrote:
| _It 's kind of a compliment_
|
| I'm not so sure it is a compliment.
|
| I've heard advertisements on the radio recently for
| financial and sports programs and web sites where they
| promise "No hot takes -- only real information."
| ggm wrote:
| NZ Met service
| https://mobile.twitter.com/MetService/status/148225203503067...
| tootahe45 wrote:
| I could hear these large thuds all the way from the top of the
| south island, NZ, in the hills and at around the same time others
| were reporting it. Definitely heard like 20+ of these sounds,
| just assumed it was some anti-pest thing going off at random
| intervals but it was pine forest so doubt it was that.
| ggm wrote:
| NZ civil defence tweet:
| https://mobile.twitter.com/NZcivildefence/status/14822498459...
| Taniwha wrote:
| Actual tsunamis have been reported in Fiji, and of course
| Tongatapu
| gchokov wrote:
| This short video from Independent is incredible as well -
| https://www.youtube.com/watch?v=Eu8V_WADjCw
|
| Edit: Shame, it's from the day before. Still interesting, so
| leaving it here.
| ryzvonusef wrote:
| the google maps location, incase anyone was curious:
|
| https://goo.gl/maps/y9bKggsA9H5fLT4x9
| twillin wrote:
| I live on a boat in Southern CA. Can someone here help me
| quantify how concerned I should be about this?
| mdoms wrote:
| You probably know more about living on a boat than most people
| here, you tell us.
| sabareesh wrote:
| please see the notes below
| https://tsunami.gov/events/PAAQ/2022/01/15/r5qho6/3/WEAK51/W...
|
| Get into deeper water
| MrsPeaches wrote:
| Selected section for boat operators:
|
| * Boat operators, * Where time and conditions permit, move
| your boat out to sea to a depth of at least 180 feet.
| * If at sea avoid entering shallow water, harbors,
| marinas, bays, and inlets to avoid floating and
| submerged debris and strong currents. * Do not go
| to the shore to observe the tsunami. * Do not
| return to the coast until local emergency officials
| indicate it is safe to do so.
|
| This doesn't seem to be specifically about house boats. Might
| be worth contacting your local emergency officials (whoever
| they may be).
| db48x wrote:
| To be honest, this is the kind of thing you should look up
| before you decide to live on a house boat.
| perihelions wrote:
| The satellite imagery is incredible -- you can see atmospheric
| waves traveling hundreds of kilometers:
|
| https://www.star.nesdis.noaa.gov/goes/sector_band.php?sat=G1...
| (GOES-West)
|
| https://www.star.nesdis.noaa.gov/goes/sector.php?sat=G17&sec...
|
| https://rammb.cira.colostate.edu/ramsdis/online/loop.asp?dat...
| (Himawari-8)
|
| https://rammb.cira.colostate.edu/ramsdis/online/himawari-8.a...
|
| Edited comment: originally linked to the wrong satellite imagery
| (from a separate eruption several hours ago). The discussion in
| this link is still informative, but not current:
|
| https://www.nesdis.noaa.gov/news/hunga-tonga-hunga-haapai-er...
| wyclif wrote:
| They are evacuating Lord Howe Island.
| qwertox wrote:
| Thank you for your incredible link collection.
|
| Here is an animated gif in the relevant timeframe, 9 MB in
| size.
|
| https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/tsp/Sandw...
|
| and one hour earlier
|
| https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/tsp/Sandw...
| matkoniecz wrote:
| 404ing for the first link
| qwertox wrote:
| Oh no! Both links are a 404 now. Why didn't I save them :(
| perihelions wrote:
| https://www.star.nesdis.noaa.gov/goes/sector_band.php?sat
| =G1...
|
| https://rammb.cira.colostate.edu/ramsdis/online/loop.asp?
| dat...
|
| (Same links, with time windows that go further back)
| perihelions wrote:
| Here's alternate versions with 24-hour long windows (not
| ideal), because I haven't figured out how to link _timestamps_
| in the URL parameters of satellite loops, so they are shifting
| forwards in time. (I 'm sure someone else will figure out a
| better solution: I've given up).
|
| https://www.star.nesdis.noaa.gov/goes/sector_band.php?sat=G1...
| (GOES-West)
|
| https://rammb.cira.colostate.edu/ramsdis/online/loop.asp?dat...
| (Himawari-8)
| Cyykratahk wrote:
| Here's the Himawari-8 satellite viewer, centred on the
| eruption.
|
| Press the right arrow icon in the bottom right to advance to
| the next 10min snapshot.
|
| https://himawari.asia/himawari8-image.htm?sI=D531106&sClC=&s...
|
| You can also download high-res images (11000x11000 PNG):
|
| https://sc-nc-web.nict.go.jp/wsdb_osndisk/shareDirDownload/b...
| (you might have to click this link twice for the search to
| work)
| samb1729 wrote:
| For anyone wanting to see the same shockwave as is linked
| here in video form, a BBC article[0] has a it embedded. The
| Himawari viewer works well for stills but makes the effect
| over time a bit harder to appreciate.
|
| [0]: https://www.bbc.co.uk/news/world-asia-60007119
| curiousgal wrote:
| Seriously fuck the BBC and their Cookie Consent prompt, do
| they really expect me to manually untick every single
| vendor?
| IanCal wrote:
| I'm curious as to what you see (I'm in the UK so there
| are very strict legal requirements that the BBC don't
| show ads so my page will be different to yours) for me
| the cookie prompt is at the top and pushes the content
| down a little but I can ignore it and see everything.
| That meets gdpr requirements as I can still do what I
| want and unless I tick OK nothing should be set.
| zh3 wrote:
| That sounds like a different experience to what we get in
| the UK - one cookie prompt and you're good to go for many
| months (at least).
|
| Could be the BBC's fault, possibly due to in-country
| legalese though?
| thorsten11 wrote:
| You could use Firefox and a cookie-handler plug-in.
| cuteboy19 wrote:
| They don't have it on mobile yet, though you can use the
| "I don't care about cookies" UBlock filterlist
| throwawayboise wrote:
| Yeah I just browse with a profile that deletes all
| cookies and history when I close the browser. Then just
| accept or dismiss all those stupid cookie consent popups.
| madacol wrote:
| Use incognito, or Firefox + Multi-account Container +
| Temporary containers
| robin_reala wrote:
| Alexander Hanff is trying to sort that: https://twitter.c
| om/alexanderhanff/status/147830653943796940...
| ceejayoz wrote:
| No, they expect you to give up and accept them.
|
| The worst one I ever saw was where above the fold items
| were unchecked, but the below the fold items were checked
| where you couldn't see them.
| irrational wrote:
| So it looks like the eruption happened right at dusk. For
| some reason that feels to me like that would make it worse
| for the people.
| zh3 wrote:
| Yeah - the timelapse of the terminator showing darkness
| descending suggests it's was a rough night.
| blobbers wrote:
| This is FANTASTIC! Thank you so much for sharing these links.
| Kids loved this, as we had just learned about similar
| volcanic eruptions through a recent Nat Geo magazine.
| gokhan wrote:
| Himawari-8 footage is excellent. That shockwave is gigantic.
| Thanks for the link.
| neom wrote:
| Really makes you think about how cool satellites have
| gotten. After some googling, I learned Himawari is a
| Japanese weather satellite:
|
| https://www.satellitetoday.com/wp-
| content/uploads/2014/08/PH...
|
| https://space.skyrocket.de/doc_sdat/himawari-8.htm
|
| https://en.wikipedia.org/wiki/Himawari_8#/media/File:Himawa
| r...
| dylan604 wrote:
| I think this might be the first satellite imagery I've seen
| that caught the color change in the clouds at sunset..
| awb wrote:
| Video from Space is equally stunning:
| https://twitter.com/wonderofscience/status/14822800417993850...
| johnyzee wrote:
| That's the best one. Incredible. To imagine that Tonga is
| practically right at ground zero. Anyone know how this
| measures in megatonnes?
| quakeguy wrote:
| 100-160 Mt i saw rumored on Twitter.
| awb wrote:
| Here's video with the sound of the eruption (loudest to
| faintest):
|
| https://twitter.com/205mph/status/1482262486535573507
|
| https://twitter.com/Rony_banchero/status/148244064075555635
| 9
|
| https://twitter.com/MrCombs679/status/1482241296135688194
| beamatronic wrote:
| Are the Tongans okay?
| awb wrote:
| No injuries reported, but communication is intermittent.
|
| https://news.yahoo.com/tonga-issues-tsunami-warning-
| undersea...
|
| > There were no immediate reports of injuries or the
| extent of the damage because all internet connectivity
| with Tonga was lost at about 6:40 p.m. local time --
| about 10 minutes after problems began, said Doug Madory,
| director of internet analysis for the network
| intelligence firm Kentik.
|
| > Tonga gets its internet via an undersea cable from
| Suva, Fiji, which presumably was damaged. The company
| that manages that connection, Southern Cross Cable
| Network, could not immediately be reached for comment.
|
| There are social media posts of the tsunami though which
| I believe are from Tonga. So folks at the shoreline were
| presumably fine enough to record and post video somehow.
|
| Tsunami:
| https://twitter.com/dwnews/status/1482331481607311360
|
| Eruption: https://youtu.be/Eu8V_WADjCw
|
| I'd be worried about anyone on an airplane near there,
| but I guess it's not a highly trafficked route.
| aatharuv wrote:
| I wonder how these social media posts were being uploaded
| due to a loss of internet connectivity. Satellite
| internet, or has internet been restored already?
| awb wrote:
| If the undersea cable was damaged I doubt it was repaired
| that quickly. I'm guessing satellite Internet.
| Taniwha wrote:
| There was one yesterday and a bigger one 3-4 hours ago
| awb wrote:
| And potentially more eruptions after the big one:
|
| https://twitter.com/MJVentrice/status/1482437044785889286
| [deleted]
| 8bitsrule wrote:
| Recording of a (very loud) blast hitting Tonga, it says
|
| https://twitter.com/205mph/status/1482262486535573507
|
| Taumoefolau: tsunami landing video
|
| https://twitter.com/sakakimoana/status/1482218193619865600
| bandyaboot wrote:
| I saw a thread on Twitter regarding the expected pressure spike
| that should be happening shortly in Southern Algeria as the
| pressure waves converge from opposite directions at the antipode
| of the volcano. Thought that was pretty interesting.
| awb wrote:
| Really interesting! Maybe this is the thread?
|
| https://twitter.com/A_J_Higgins/status/1482386808021340160
|
| Author says no danger to Algerians BTW.
| bandyaboot wrote:
| Yeah, that's the one.
| georgeburdell wrote:
| Is there any website tracking how long the sound would take to
| reach various locations? I'm guessing I might be able to hear a
| gentle rumble in SF
|
| Edit: some Googling tells me it's about 5300 miles from SF to
| this volcano. At 767mph, that's 6 hours and 54 minutes. The
| volcano erupted at 8:26pm Pacific, meaning at around 3:20am
| Pacific time the sound should reach SF.
| quickthrower2 wrote:
| Heard nothing in Sydney Australia .. so I wouldn't count on
| hearing it from SF.
| mcyukon wrote:
| 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
| HeyLaughingBoy wrote:
| Accounting for inaccuracy, temperature changes along the
| way, wave diffraction, etc., I'd say you heard it.
| pleb_nz wrote:
| 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.
| jb1991 wrote:
| It was heard easily in North America:
|
| > The eruption of the Hunga Tonga-Hunga Ha`apai volcano was
| heard across the South Pacific, and eventually as far away as
| the US.
|
| https://www.bbc.com/news/world-asia-60007119
| carbocation wrote:
| FYI there is a tsunami advisory for the entire west coast at this
| point: https://tsunami.gov/ (specifically at [1], but tsunami.gov
| will contain the latest).
|
| Expected arrival times in California (Pacific Time):
| * California Fort Bragg 0735 PST Jan 15
| Monterey 0735 PST Jan 15 Port San Luis 0740
| PST Jan 15 Santa Barbara 0745 PST Jan 15 La
| Jolla 0750 PST Jan 15 Los Angeles Harb 0750 PST
| Jan 15 Newport Beach 0755 PST Jan 15
| Oceanside 0755 PST Jan 15 Crescent City 0800
| PST Jan 15 San Francisco 0810 PST Jan 15
|
| 1 =
| https://tsunami.gov/events/PAAQ/2022/01/15/r5qho6/3/WEAK51/W...
| matkoniecz wrote:
| Any info how large it is expected to be?
|
| The advisory is really unclear how it is on scale "measurable
| wave" to "run away immediately"
|
| Lack of specific seems to point to the first one but...
| awb wrote:
| Not too big on the West Coast, it hit Santa Cruz and caused
| minor flooding at the harbor.
| awb wrote:
| Video of the flooding:
| https://twitter.com/VFisher45/status/1482418293117886464
| Rebelgecko wrote:
| A few feet. It looks like there was some light flooding at a
| marina in Santa Cruz: https://twitter.com/PMBreakingNews/stat
| us/148239782805603123...
| sonium wrote:
| > If you are in a tsunami advisory area;
|
| >* A tsunami with strong waves and currents is possible.
| matkoniecz wrote:
| "Strong waves" may be anything from "measurably stronger
| wave" to "0.5m tsunami wave that requires evacuation from
| flat coastal areas"
| whoisburbansky wrote:
| You can see wave heights by looking at the residuals plots on
| tide stations: https://tidesandcurrents.noaa.gov/tsunami.
| Looks like 2ft peaks in Monterey?
| tomc1985 wrote:
| Huh, Fort Bragg is a lot closer to Crescent City than
| Oceanside. I would think the earliest time would be the center
| of the incoming wave?
| janmo wrote:
| https://mobile.twitter.com/FirstName__Last/status/1482259505... I
| am no expert but this looks huge, perhaps something the size of
| the Krakatoa eruption.
| https://en.wikipedia.org/wiki/1883_eruption_of_Krakatoa
| kingofpandora wrote:
| What are you basing your comparison of the two on I wonder?
| yesenadam wrote:
| From the Krakatoa page:
|
| "The third explosion has been reported as the loudest sound
| heard in historic times. The loudness of the blast heard 160 km
| (100 mi) from the volcano has been calculated to have been 180
| dB. Each explosion was accompanied by tsunamis estimated to
| have been over 30 metres (98 feet) high in places. ...The
| energy released from the explosion has been estimated to be
| equal to about 200 megatonnes of TNT, roughly four times as
| powerful as the Tsar Bomba"
| thematrixturtle wrote:
| That seems unlikely, since the magnitude was only 4.0. The
| relation between magnitude and actual impact is complex, but
| big ones tend to be 6+ and really big ones 8 or even 9.
| cmurf wrote:
| What is the magnitude scale for volcanoes vs earthquakes? The
| tsnumai.gov site says this is magnitude 1.0 but without units
| or type. So I wonder if it's a tsunami potential specific
| scale?
| alexander-litty wrote:
| I think the 1.0 magnitude is there as a placeholder. The
| advisories say to ignore it:
|
| >Please disregard earthquake parameters
| divbzero wrote:
| The terminator in this video provides a good sense of time
| elapsed.
| xarball wrote:
| Wow I'd never have known the line between day and night ever
| had a name, before you used that word! :)
| tialaramex wrote:
| In some alternate universe 1984's "The Terminator" is a
| movie with a similar plot to "Pitch Black" in our universe
| (yes I know it's an eclipse in "Pitch Black").
| dylan604 wrote:
| The Ecliptic Terminator - "I'll be back!"
| Andrew_nenakhov wrote:
| And you can be pretty sure it will be back, inevitably.
| miedpo wrote:
| Much smaller than Krakatoa so far. We'll have to see where it
| comes out on the VEI scale though. Krakatoa was really big, so
| I think it's pretty unlikely we will get close to that on this
| one.
|
| The Tsunami they are guessing probably came from an earthquake
| or underwater landslide caused by the eruption, but the
| eruption doesn't really need to be huge to cause those. It'll
| be interesting to see once the eruption stops (if it's a
| landslide, you can usually see a crescent shaped formation on
| the volcano, although it may be underwater).
| MontagFTB wrote:
| US Stormwatch has an incredible shot of the eruption- the largest
| ever captured by satellite:
| https://twitter.com/US_Stormwatch/status/1482229220415721475
| mtoohig wrote:
| Here in Vanuatu we could also hear it. On facebook people from
| all the islands are talking about it and were trying to figure
| out if it was one of our own island volcanoes that erupted.
| watersb wrote:
| Has Vanuatu been affected by tsunami or ash ejecta?
|
| I have a friend there. I hope you all stay safe. And then I
| wonder about air travel impact for all of the region.
| accidue wrote:
| Amazing satellite crop here:
|
| https://twitter.com/weatherwatchnz/status/148223725311218893...
|
| Top middle - eruption Left middle - cyclone Cody Bottom left -
| New Zealand 2000km/1200miles away
| [deleted]
| transitory_pce wrote:
| Does Larry still live there?
| dzhiurgis wrote:
| These volcanos have been on since December so I guess he'd
| bailed since then.
| fguerraz wrote:
| You know it's bad when the tide gauge data stops suddenly. :/
|
| http://www.ioc-sealevelmonitoring.org/station.php?code=nkfa
| AnotherGoodName wrote:
| >"We continue to try and contact the Tonga network operations
| centre but at this stage remain unable to do so, even via
| satellite phone. While we understand Tonga also has satellite
| links, we don't know whether the satellite ground equipment has
| been affected."
|
| The ground link between Fiji and Tonga was broken. Even
| satellite links are down due the ash cloud. That's why there's
| no telemetry from anything at all. Hard to imagine but we have
| no link to Tonga.
|
| https://www.stuff.co.nz/business/127512800/southern-cross-ca...
| jwtorres wrote:
| Getting crazy tides sloshing in and out of the marina every
| couple minutes here on Oahu.
| tunnuz wrote:
| Crap, I hope people are safe :(
| vdo wrote:
| Along southern Alaska, the shockwaves were audible a few hours
| ago. I slept through it, but my feed has people complaining of
| having been woken up. Our local subreddits have posts from people
| being confused about potential thunder or military exercises. It
| is incredible to think of the energy involved in these events.
| darknavi wrote:
| Do you know what time? I'd love to see if any of my cameras
| picked it up but hard to scrub audio in large quantities.
| vdo wrote:
| Around 4-5 AM AKST going off what I see others have been
| saying, sorry I don't know precise timestamps. One of the
| posts in /r/alaska was at 4:50 AM. One in /r/anchorage was at
| 4:39 AM.
|
| Edit: Alaska Volcano Observatory just posted this graph of
| the pressure wave here
|
| https://www.facebook.com/alaska.avo/posts/296707312495753
| tazjin wrote:
| Put the audio in a tool that visualises it (e.g. Audacity),
| should make the segments easier to pick out than scrubbing.
| motorist_hacker wrote:
| maximp wrote:
| Can't report but someone who can should - video is unrelated to
| thread.
| motorist_hacker wrote:
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(page generated 2022-01-15 23:00 UTC)