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Re:Strange earthquake waves rippled around Earth by ian0 on Thursday November 29, 2018 @01:08AM (#18558427)
The twitter exchanges between the geologists mentioned in the article are great.

They talk in real life how hackers talk only in movies. Very jealous.

https://twitter.com/matarikipax/status/1061590953876582402

https://twitter.com/ALomaxNet/status/1061637338709790721

Re:Strange earthquake waves rippled around Earth by anon2775 on Thursday November 29, 2018 @02:17AM (#18558636)
Long period waves and their decay signature makes me suspect "water hammering" of a large volume of magma came to an abrupt stop inside a magma chamber or tube.
Re:Strange earthquake waves rippled around Earth by cryptonector on Thursday November 29, 2018 @12:31PM (#18561929)
Some of the tweets speculate about a magma chamber roof collapse due to the chamber emptying a bit.
Re:Strange earthquake waves rippled around Earth by powvans on Thursday November 29, 2018 @01:31AM (#18558503)
Googling the Mayotte Island that they tracked it to shows that a magnitude 5.0 earthquake occurred within the last hour:

https://earthquake.usgs.gov/earthquakes/eventpage/us1000hwxr...

Re:Strange earthquake waves rippled around Earth by brownbat on Thursday November 29, 2018 @02:22AM (#18558655)
Tangent, but this place, which I knew basically nothing about before just now, appears to be stunningly beautiful, judging from the somewhat random sample of images on Wikipedia:

https://en.wikipedia.org/wiki/Mayotte

It's humbling... I feel like a bad citizen of the world for my ignorance of Mayotte. But also optimistic... the world is full of so many amazing places, there's always going to be some next amazing place to learn more about.

Re:Strange earthquake waves rippled around Earth by porpoisely on Thursday November 29, 2018 @08:22AM (#18559965)
Pretty much every island near the equator looks like a tropical paradise. But appearances can be deceiving. A lot of these places are poverty stricken because of their distance from economic centers of the world. And many of these island paradises ( especially in the pacific ) have suffered ecological disasters due to introduction of invasive species by european explorers.

I think Attenborough did a documentary a while back on how the introduction of invasive cats, rats, snakes and even spiders would wipe out local fauna on these islands because the local fauna weren't used to predation. Pretty interesting stuff.

Also, the local population of these islands are suffering extreme health issues ( primarily obesity related ) due to all the junk food they are eating.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1533815/

The nature is beautiful for sure, but it isn't all paradise. And we haven't even touched on the impact of global warming on these islands and the fact that some of these islands might have to be evacuated in the next few decades.

https://www.businessinsider.com/islands-threatened-by-climat...

Re:Strange earthquake waves rippled around Earth by oh_sigh on Thursday November 29, 2018 @01:42PM (#18562611)
Any time you see a scenic tropical paradise, you can also be sure that you are going to deal with a crap ton of bugs and creepy crawlers.
Re:Strange earthquake waves rippled around Earth by exoesquitur on Saturday December 01, 2018 @02:15PM (#18578341)
Idk, I think Central Florida takes the cake for bugs and pestilence, at least has more than the islands in the carribean I've lived on.
Re:Strange earthquake waves rippled around Earth by reaperducer on Thursday November 29, 2018 @01:42PM (#18562609)
Listen to RNZI news (it streams), and you'll be surprised how many visually idillic Pacific Islands are wrought with military dictatorships, poverty, violence (gun, domestic, military), and worse.

There was one recent article about how a mission to distribute life-saving vaccines had to be abandoned because of a lack of infrastructure and trucks able to get to the villages that need it.

Re:Strange earthquake waves rippled around Earth by ashrk on Thursday November 29, 2018 @04:26PM (#18564183)
I spent a lot of time a few years back reading some Russian world traveller's photo blog (he looooved taking photos of signs and fire hydrants and such, which I wasn't super into but was sometimes interesting, but also posted plenty of other things—I misplaced the URL long ago or I'd link it) and the rule for off-the-beaten-path tropical paradises seemed to be that they were incredibly poor and absolutely covered in litter and improvised garbage dumps. If there were touristy sections it'd be every square meter of the place off the tourists' beach that looked like this.
Re:Strange earthquake waves rippled around Earth by seriouspat on Thursday November 29, 2018 @02:52AM (#18558747)
I lived there for 4 years and you shouldn't trust the random pictures you see on the internet. The place is a shithole.
Re:Strange earthquake waves rippled around Earth by presscast on Thursday November 29, 2018 @06:45AM (#18559528)
I had the pleasure of taking to a French high-school professor who worked there for 10 years. He basically said what you said.
Re:Strange earthquake waves rippled around Earth by distances on Thursday November 29, 2018 @03:32AM (#18558868)
I'd love to hear of some experiences!
Re:Strange earthquake waves rippled around Earth by maeln on Thursday November 29, 2018 @03:43AM (#18558896)
Mayotte is a French oversea territory. And like almost all french oversea territory it is very poor, but less than the average neighbor countries leading to a lot of immigration which are difficult to control (even though Mayotte is an Island which make it a bit more controllable than Guyana for example). This usually end up in a increasing poverty and unemployment, leading to criminality, aging infrastructure, and public services not being able to handle the demand.

Like a lot of oversea territory, it has some beautiful landscape, but is crippled by the problems above. Living there is very difficult.

EDIT: Note also that I am not blaming immigrant. The problem being that adding more poor people in an already poor territory doesn't solve the problem of poverty. And France unwillingness to treat its oversea territory fairly and really invest in them is the main root of the problem.

Re:Strange earthquake waves rippled around Earth by seren on Thursday November 29, 2018 @05:52AM (#18559338)
The specific issue with Mayotte is that the other half of the archipelago has chosen to remain independent [1].

So on a very small territory you have a third world country, Comoros, and a piece of the European Union, where, even if it is not on par with continental Europe, has a much higher quality of life.

So there is a quite large influx of immigrants from Comoros, and this is hard to manage for such a small island.

[1] In 1974, France organized a referendum for self-determination in the archipelago in which the population except in Mayotte voted overwhelmingly in favour of independence. Following the unilateral declaration of independence in 1975, France maintained sovereignty over Mayotte. The three remaining islands formed the Etat Comorian, which later became the Federal Islamic Republic of the Comoro Islands.

Re:Strange earthquake waves rippled around Earth by donkeyd on Thursday November 29, 2018 @04:12AM (#18559000)
This sounds a lot like Haiti. I was there on vacation for a couple of weeks. In general, Haiti dirty and poor, but there were some truly beautiful places. Unfortunately, only a few of them are actually available if you aren't there on either a cruise, or are friends/connected with the local 'bourgeoisie'.

One of the places that stuck with me the most is Kay Winnie in Seguin. It's a house, built by a man who moved there from the city in order to protect one of the last forests in Haiti. He grows and plants saplings to grow the forest. Unfortunately, you need to hike quite far or drive through incredibly rough terrain to get there.

Re:Strange earthquake waves rippled around Earth by starbeast on Thursday November 29, 2018 @05:11AM (#18559193)
Recently read 'The Comedians' by Graham Greene, which is set in Haiti during the rise of Duvalier. Those people have been through some terrible shit for a long time now.

edit - is worth reading - https://www.goodreads.com/book/show/133399.The_Comedians

Re:Strange earthquake waves rippled around Earth by donkeyd on Thursday November 29, 2018 @07:59AM (#18559840)
> Those people have been through some terrible shit for a long time now.

Yup. And having been there and having spoken to locals and people from the UN, MSF, etc. I don't feel like it's going to change soon. A lot of the economy is driven by NGO's and that money all ends up in the pockets of the rich home, hotel and restaurant owners. Meanwhile the poor sell each other mangos and meat in the streets. It's like there are two completely separate economies. And whenever a politician wants to make a change, tribalism seems to end up ruining it because (often realistic) fear of preferential treatment of some groups.

Re:Strange earthquake waves rippled around Earth by starbeast on Thursday November 29, 2018 @08:21AM (#18559962)
>A lot of the economy is driven by NGO's and that money all ends up in the pockets of the rich home, hotel and restaurant owners. Meanwhile the poor sell each other mangos and meat in the streets.

Sounds eerily similar to the situation things rapidly deteriorate from at the start of the book, which was set 60 years ago now.

Re:Strange earthquake waves rippled around Earth by gambiting on Thursday November 29, 2018 @04:35AM (#18559071)
As it is part of France, do people there technically have EU citizenship?
Re:Strange earthquake waves rippled around Earth by openplatypus on Thursday November 29, 2018 @04:56AM (#18559134)
https://en.wikipedia.org/wiki/Special_member_state_territori...

> Mayotte is the newest of the five overseas departments having changed from an overseas collectivity, with OCT status, on 31 March 2011. It became an outermost region and thus part of the EU on 1 January 2014.[8]

Re:Strange earthquake waves rippled around Earth by maeln on Thursday November 29, 2018 @04:48AM (#18559106)
Yes. Some of the oversea territory had a weird status in the past (see openplatypus comment), but nowadays they are almost all DROM which mean, it is part of France, and being born there makes you French (and makes you a EU citizen).
Re:Strange earthquake waves rippled around Earth by raverbashing on Thursday November 29, 2018 @05:29AM (#18559266)
"Fun fact" this doesn't happen to some of the UKs crown dependencies like: the Isle of Man or Channel Islands

(though they're allegedly leaving so it won't matter too much anymore)

Re:Strange earthquake waves rippled around Earth by Retric on Thursday November 29, 2018 @05:45AM (#18559315)
The UK situation with its dependencies is very complex. I found this short video helpful: https://www.youtube.com/watch?v=rNu8XDBSn10
Re:Strange earthquake waves rippled around Earth by raverbashing on Thursday November 29, 2018 @06:15AM (#18559425)
Yes that video is excellent. (Also: "with its dependencies")
Re:Strange earthquake waves rippled around Earth by dvdgsng on Thursday November 29, 2018 @08:49AM (#18560101)
I just saw a documentary about Réunion yesterday, an island in the vicinity with a unique culture & cuisine (a fascinating mixture due to colonization history) paired with great tropical nature due to (now inactive) volcanoes that created some beautiful hiking trails in craters and calderas. All those little islands around Madagascar seem to be really lovely and beautiful, they are certainly on my ToDo travel list now.
Re:Strange earthquake waves rippled around Earth by jventura on Thursday November 29, 2018 @11:30AM (#18561403)
Been there some years ago for two weeks of paragliding. One of my best memories for sure, beautiful island, very clean waterfalls.. There's an active volcano though [1]..

[1] https://en.wikipedia.org/wiki/R%C3%A9union#/media/File:Volca...

Re:Strange earthquake waves rippled around Earth by kaybe on Thursday November 29, 2018 @12:03PM (#18561696)
What do you mean, 'though'.. that's another plus! It's monitored so it won't go off and kill people without warning and time for evacuation.

And it's Hawaiian style, which means very fluid and low ash, which is the most fun style of volcanoes because it won't really explode (the gas can escape steadily instead of building up pressure) and you can get pretty close during an eruption.

Worst case, your flight is delayed or cancelled and you cannot stay in a specific village. Best case, you get to see an awesome and safe display of natural forces!

Re:Strange earthquake waves rippled around Earth by gregschlom on Thursday November 29, 2018 @02:43PM (#18563253)
I think "though" was in reaction to the GP saying that the volcanoes on the island are inactive. I was going to say the same thing, the piton de la fournaise is very much active.
Re:Strange earthquake waves rippled around Earth by dvdgsng on Thursday November 29, 2018 @07:26PM (#18565533)
Thanks, guess I misinterpreted the documentary, they were only talking about huge calderas from former eruptions. Or I missed the part where they talked about the active volcano (multitasking, meh ...).
Re:Strange earthquake waves rippled around Earth by wazoox on Thursday November 29, 2018 @11:20AM (#18561317)
Choose your time carefully, the population is currently rioting and the island is in near complete chaos...
Re:Strange earthquake waves rippled around Earth by dvdgsng on Thursday November 29, 2018 @07:21PM (#18565499)
Thanks for the hint, will do some reading on this ...
Re:Strange earthquake waves rippled around Earth by tangue on Friday November 30, 2018 @08:36AM (#18568955)
I live there, it's a bit exagerated. But I wouldn't recommend coming in the forecoming month. If you really want to come feel free to ping me if you need some advice.
Re:Strange earthquake waves rippled around Earth by arethuza on Thursday November 29, 2018 @10:07AM (#18560676)
I went (and indeed got married) in the Seychelles - absolutely gorgeous places. Surprisingly large granite mountains on the main island as well.
Re:Strange earthquake waves rippled around Earth by gizmo385 on Thursday November 29, 2018 @12:28PM (#18561906)
The tweets are from earlier this month, November 11th.
Re:Strange earthquake waves rippled around Earth by SubiculumCode on Thursday November 29, 2018 @02:19AM (#18558642)
my favorite:Good questions! A simple body wave M may underestimate and simple surface wave M may overestimate, but a waveform-based moment-tensor inversion type M for the surface waves may confirm shallow depth and produce a usefully accurate M...
Re:Strange earthquake waves rippled around Earth by cryptonector on Thursday November 29, 2018 @12:30PM (#18561917)
Thanks for those links. Some of the commentary speculates that a magma chamber emptied a bit and its roof collapsed as a result of a quake, and that collapse is the source of the low-frequency waves. Fascinating.
Re:Strange earthquake waves rippled around Earth by cryptonector on Thursday November 29, 2018 @12:23PM (#18561865)
> It looks like two or more frequencies mixed ...

Eh? Do seismologists not have FFT signal processing tools at their finger tips.

Re:Strange earthquake waves rippled around Earth by njarboe on Thursday November 29, 2018 @12:48PM (#18562077)
Seismologists invented FFT signal processing. Rumors circulate at oil companies that many companies discovered it independently and were using it internally years before the method was openly published. It would be hard to underestimate the value of FFT processing to that industry.
Re:Strange earthquake waves rippled around Earth by gpvos on Thursday November 29, 2018 @02:54PM (#18563346)
*overestimate
Re:Strange earthquake waves rippled around Earth by bsamuels on Thursday November 29, 2018 @12:41PM (#18561998)
one of the pictures is literally a fft graph, so yes
Re:Strange earthquake waves rippled around Earth by checker659 on Thursday November 29, 2018 @01:50AM (#18558560)
I understood the P / S part (P-waves and S-waves).