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WorldMassive volcano discovered under the sea

05:05  24 may  2019
05:05  24 may  2019 Source:   msn.com

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Massive 'lake' discovered under volcano could unlock why and how University of Bristol. The volcano , which was accidentally discovered by a In the event the volcano erupts, then the flow of ice sheet into the sea will be accelerated, which will in turn raise the current sea levels which are already

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The source of a bizarre seismic event first spotted by a Wellington-based Twitter user has been identified.

Massive volcano discovered under the sea
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It was the birth of a massive underwater volcano - perhaps the biggest eruption ever recorded under the sea.

On November 11 last year, seismometers across the world recorded a strange vibration. Twitter user @matarikipax, real name unknown, saw it on a US Geological Survey feed and called it "most unusual".

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© Marco Restivo/Getty Images na volcano eruption Credit: Marco Restivo px in Sicily’s Mount Etna is one of the world’s most active volcanoes , but A new study shows that Etna is slowly sliding toward the sea , raising the prospect that it may suddenly collapse and trigger a massive tsunami that could

There was no earthquake to trigger the shaking, which began just off the coast of Madagascar near the French island of Mayotte.

No one felt anything despite the rumbling going on for 20 minutes, dominated by a low frequency that repeated every 17 seconds.

"I don't think I've seen anything like it," Columbia University seismologist Göran Ekström told National Geographic.

"It's like a ringing bell," French Research Institute for Development seismologist Jean Paul Ampuero told Gizmodo. "If you want to get a very low frequency, a very low tone, you need that bell to be huge."

A volcano seemed to fit the bill, but scientists were sceptical because it had been thousands of years since the last one in the region, and no pumice was seen at the surface.

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from research organizations. Massive 'lake' discovered under volcano could unlock why and how University of Bristol. (2016, November 8). Massive 'lake' discovered under volcano could unlock why and Lakes like Utah's Great Salt Lake, Asia's Aral Sea , the Dead Sea in Jordan and read more.

Volcanoes show up along faults in the earth's crust, so when the fault moves enough to expose magma, that can lead to a volcanic eruption. The newly discovered volcano is very close to New Eddystone Rock, which is what's left over from another volcano , which may have erupted around the

French researchers recently mapped the seabed in the area, reports Science magazine, and they've confirmed the cause - a brand new volcano, 800m tall and five kilometres wide.

"We have never seen anything like this," said Nathalie Feuillet, expedition leader.

About five cubic kilometres of magma erupted onto the seabed, the French team found. Rocks brought to the surface popped open once they were brought on board, releasing high-pressure gases trapped when the magma cooled in the deep ocean.

But why did an eruption happen now? Africa itself is splitting up thanks to continental drift, which could be behind the renewed activity, one geologist told Science.

A magma chamber is suspected to be shrinking as a result, pushing its contents upwards towards the surface, and letting the land above subside. The island of Mayotte has sunk 13cm and shifted 10cm east in the past year as a result.

Since the volcano's birth in November there has been continued earthquake activity in the region, and they appear to be trending towards the island, raising fears of a tsunami.

Read more

Dazzling moment Mount Etna erupts and shoots jets of lava and volcanic ash into the air, lighting up the night sky.
The 700,000-year-old Sicilian volcano began erupting at 3am local time following an increase in seismic activity over the last week. Incredible images captured the moment molten lava trickled down the side of Europe's most active volcano, which is 700,000-years-old and 24 miles wide.

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