[HN Gopher] Large Eruption Near Tonga, Heard in NZ. Tsunami at T... ___________________________________________________________________ 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: ___________________________________________________________________ (page generated 2022-01-15 23:00 UTC)