Mysterious Planetwide Rumble May Have Come From the Largest Underwater Eruption Ever Recorded

Back in November if 2018, RadioRobert posted a thread titled, "Strange seismic waves originating off French Madagascar." Scientists now think that the then-unknown seismic signal was caused by a huge underwater volcanic eruption:

On November 11, 2018, a deep rumble ricocheted around the world, one that humans couldn’t feel but that registered quite clearly on seismometers. A new pre-print paper about the event is now suggesting that it was caused by the largest offshore volcanic event in recorded history.

Originating 30 miles east of the island of Mayotte, near Madagascar, the mid-November signal immediately caught the attention of a disparate group of geoscientists. They subsequently took to Twitter to express their fascination over this mysterious event—one even joked about a “giant prehistoric sea monster.”

Gizmodo

The problem in knowing for certain whether or not this was a volcanic event lies in the fact that there is a scarcity of sensors in the region.

Via a series of calculations of the information they have received from the sensors that are in place in the area, seismologist have determined where they think the location of the underwater volcano to be, along with an estimate of the amount of magma released by the eruption.

From the above mentioned paper:


The paper mentions that the reason that there have been no direct observations of magma on the seafloor is that there is a depth of sediments in the area that the magma has been flowing beneath and due to the pressure of the water, volcanic gasses are still trapped within the magma.

Scientists are keeping a very close eye on the situation because if there is any sudden subsidence of even a small percentage of the total volume that they estimate to have erupted, there is the potential for a significant tsunami:

If the eruption lasts one year, which is typical for volcanic eruption, the subsidence of Mayotte will exceed 0.1 m which is large but not critical for the inhabitants and infrastructures, and the total volume emitted will exceed 2 km3. Such volcanic event near a coast is the largest ever observed and it may be a major teacher for the understanding of how off-shore volcanoes work.

Although the inferred deflation source is deep, not having the experience of previous similar events, we believe that we cannot rule out the possibility of a collapse above the deflated reservoir. Occurring after one year, and involving just 1% of the erupted volume, the deforming source (20 millions of m3) would be equivalent to a disk of 12 km of diameter subsiding by 0.2 m. Such volume scales with some known sources of tsunami triggered by either earthquakes or landslides.

The volcano-tectonic crisis of 2018 east of Mayotte, Comoros islands

Is we look at the estimated volume that could be erupted by this knew underwater volcano and compare it with eruptions of the past we see that this ranks in the same category as some of the more dangerous events of history:


VEI - Geology.com

An eruption of 2 cubic kilometers, puts this volcano at a little under Mount Vesuvius, which is the event that buried Pompeii.

So, ATS, here is a bit of potential doom porn that is not political for you to consider.

a reply to: jadedANDcynical

Oh frak!

One more in a long line of threats the earth is entering into at this time.
If people stayed aware of each one as they come to light they would not sleep well.

Holy Krakatau!! I had always thought Toba was the largest, nearly wiping out what was the human race back then or so I've read. Damn, surprised the planet is still here after Wah Wah Springs. Meh. Wah, wah!
If that blows you had better be long gone off the planet in advance.
I think Yellowstone is overdue but like mega earthquakes who knows.
I worry more about leftist doom so this does not keep me awake at night.

a reply to: EndtheMadnessNow

Yeah, Wah Wah Springs doesn't get near the press any of the others do, but as you can see by the chart in the OP, it absolutely dwarfs any other known eruption.

It wasn't an isolated event, the researchers said; evidence was found of 15 super-eruptions and 20 large calderas.

Evidence of ancient supervolcano found in Utah

And really, Yellowstone is not at all likely to happen in any of our lifetimes. Long Valley or the Phlegraean Fields (of which Vesuvius is a part) are both showing more signs of an eruption than is Yellowstone.

Schumann resonances went mad!!.
can not give link to that story.
its a web site that is a lot better than ATS.
and one about maybe a star that has started
beaming out massive amounts of energy again.
put all three together and you have it.
maybe...

a reply to: jadedANDcynical

When I read your thread title I thought, "Hey, I wonder if that's related to the Madagascar story".

Very cool

a reply to: RadioRobert

Yeah, as soon as I saw the article on Gizmodo, I knew it was related to the event in your thread.

From there:

originally posted by: jadedANDcynical
a reply to: ElectricUniverse

I'm glad you brought this up. I went back and was looking at the spectrogram:

And noticed that in the decay portion of the signature, there is still a fairly significant signal response in the 1-2 hz frequency range. This is mirrored by another response, albeit less intense at the 6-8hz range, and again in the 12-14 hz range, evem less intense than that of the response in the 6-8 hz range.

These particular signatures are similar to what can be seen in volcanic tremor, specifically harmonic tremor. Harmonic tremors are indicative or fluid (usually magma, but sometimes water, and even icebergs) movement.

It is looking like the deduction I made based on the limited information we had available may be correct. It will certainly be interesting to see what else they learn about this potential eruption.

If the event herein described had taken place above the surface of the ocean, it would likely be world wide news.

so where is the visual evidence? trawl a sidescan radar or sonar device in the 1000 Square mile target site, a caldera should be obvious for the energy calculated to have been explosive enough to create a very large depression in the local deep sea trench



I got a notion the rumble was not a volcano in the deep ocean...

if you have ever microwaved a can of Chunky Vegetable Soup, and heard one of those diced potato chunks explode in your Corning Ware 7"x3" Casserole Dishes with a glass lid the lid rattles & liquid splashes all over the place


my notion is that deep in the hot, thick & syrupy Mantle … that a huge chunk of former 'crust' that got subducted down to the inner Earth molten interior had finally had a large deposit of volatile material (maybe a phospherous deposit) explode deep in the molten rock some multiple 10s or dozens of kilometers down there in what is a virtual sealed pressure-cooker place.... whatever it was that exploded in that closed space couldn't go anywhere but send pressure waves on the underside of the Earth's crustal plate --->> And those pressure waves is what caused the 29 minute or so 'ringing' of the whole globe as the trapped explosion faded away.



the inner/outer cores of the Planet are getting agitated because of our Suns twisted magnetic fields and exotic particles output … and more deep mantle explosions could be in our future... with nary a lava flow or volcano to show for it or point your finger at


thanks...

a reply to: jadedANDcynical

For a few years now I have been posting evidence/information showing that underwater volcanic activity has been increasing. Although some die-hards in the forums kept claiming this was not true.

The Earth is undergoing many changes, including geological changes, which haven't happened for a very long time. These type of events will continue to be more frequent, and will only get worse. It has nothing to do with mankind,(same for climate change) but rather because ofthe environment in the Local Fluff we have been entering, which is much different than the part of the local Fluff which our Solar System had been in for 10,000 years.

Earth is not the only planet in the Solar System undergoing these drastic changes, including climate change. Which points to the culprit being that region of the Local Fluff we are entering, and the increase in cosmic rays the Earth has been receiving since the 1990s.

If by our Solar System encountering small "cloudlets" of this new region we are entering, and in which we will be completely inside within 90 years; can you imagine what changes Earth, and the entire Solar System will undergo once we are completely within this region of the Local Fluff?

Ribbon at edge of our solar system: Will the Sun enter a million-degree cloud of interstellar gas?

The entire Solar System, including the Earth, is reacting to this new area of the Local Fluff we are entering.

Pluto is alive—but where is the heat coming from?

Because of this Earth is experiencing an increase in it's geological activity, as well as drastic climate change which is falsely being attributed to mankind's activity.

Molten iron river discovered speeding beneath Russia and Canada

a reply to: ElectricUniverse

I have read and maybe posted there are an estimated one million hydro thermal vents beneath the oceans and many many active volcanoes. Usually crickets or people refusing to believe the latest subsurface findings..

originally posted by: SeaWorthy
One more in a long line of threats the earth is entering into at this time.
If people stayed aware of each one as they come to light they would not sleep well.

Not true...some sleep far better.

a reply to: ElectricUniverse

Wow. Take that all into account and it seems we are due for another reset.. And it's a shame because I feel we were finally close to escaping this rock.

Just keep an eye out for the elites disappearing from public view I suppose.

a reply to: ElectricUniverse

Totally agree

a reply to: buddha

its a web site that is a lot better than ATS. 

That's a broad statement.

Care to share?

a reply to: St Udio

so where is the visual evidence?

Well, the seafloor is somewhere around 3000-4000 meters down where the hypocenters are located. They measure the speed of the seismic signals and they're able to determine the approximate location and shape of the magma plume; the speed of seismic signals is affected by the presence of magma.

They looked at the seismic data and determined that there were many smaller earthquakes which were embedded in the long period event.

From the paper linked in the OP:

Several low frequency tremors(e.g. Tab. 1) have been recorded. The largest one, on November 11(Fig. 9), recorded worldwide, awaked the interest of the seismological community and the media. None of those tremors is triggered by a strong earthquake, but there are earthquakes embedded in all tremors and all start with moderate and high frequency events.

The above description fits perfectly with an injection of magma from below. The magma breaks, displaces, and melts the rock above it which produces the long period, low frequency tremor along with co-seismic smaller events in areas in which the magma is moving. It will seek the path of least resistance and follow existing fault lines or softer rock.

So far, they do not think it has breached the surface of the seafloor and all of this is happening at depth. There has been enough deformation and movement discernible from sensors that, along with the aforementioned seismicity, add to the conclusions that there is an underwater volcano forming off the coat of Mayotte.

They don't have enough instrumentation to make a more refined analysis just yet, but from what they have learned, there does appear to be a sizeable intrusion of magma from below.

Again, from the paper in the OP:


The magma was moving from right to left in this image as can clearly be seen when you look at the time series, blue, to yellow, to red.


Further study, including updating the bathymetry, will tell them more.

a reply to: ElectricUniverse

Yesssss! 🥂 Everything you stated is exactly what our research years ago showed here on ATS. Exactly. When I read your post I looked back up at the name to make sure it wasn’t me because I never see someone saying the same thing as me 😂 www.abovetopsecret.com...