Would you have ever guessed that a mere magnet could dethrone the largest volcano on this planet, possibly even in this solar system! That former-king of volcanoes is called Tamu Massif! It sprawls over an area of 120,000 square miles! For comparison, that’s about the size of New Mexico, the 5th largest state in the US. On the long list of famous volcanoes we all know since grade school, why haven’t most people heard of Tamu Massif? The thing is, this sleeping giant hasn’t erupted in a long long time. But just because this volcano has apparently decided to retire, that doesn’t mean nothing’s happening there. Mainly, it’s a massive source of magnetic anomalies… Other videos you might like:
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Volcano the size of a state 0:34 🌋
Why haven’t most people heard of it? 1:56
Magnetic anomaly! 2:54 😵
This thing isn’t exactly a volcano… 5:24
Bonus: The undersea volcano that created the island of Bermuda 7:25 #volcanoes #anomaly #brightside SUMMARY:
– Its record-breaking size results partly from its location, as the volcano sits at the intersection of 3 underwater fault lines. – The molten layers beneath the planet’s crust are rich in metals like iron, nickel, and cobalt. All of those are known for their magnetic properties. So when you get a whole bunch of them, you’re bound to produce a magnetic anomaly! – Magma is a sort of gooey hot semi-liquid beneath or within the Earth’s crust. Yep, it’s under your feet right now! Since it’s less dense than solid rock, it naturally flows upward, sometimes finding an exit through a volcano.
– A volcano as big as Tamu Massif is going to have some outstanding eruptions, especially when it’s in a geological hotspot like the Ring of Fire.
– The Earth’s magnetic field goes through natural cycles over the course of several million years. You can imagine our planet like a giant magnet.
– When a volcano erupts, the expelled lava carries with it the magnetic charge it had when it was part of the earth’s mantle. – Shield volcanoes form when magma oozes out, piles up on itself, and cools over time. – But that’s not the case with Tamu Massif. It has “stripes” of magnetic anomalies that point to it popping up a different way. – Tamu Massif’s striped magnetic anomalies point to gradual seafloor spreading over a couple million years, not volcanic formation from hardened lava.
– While bulges in the earth’s crust exist all over, this is the only known example with a massive volcanic system sitting on top!
– Then again, there are plenty of other volcanoes that are just as unique and puzzling. Heading over to the Atlantic, geologists recently found something very exciting just off the shores of Bermuda.
– For many years, geologists assumed that Bermuda had formed over a volcanic hotspot, just like Hawaii
– They discovered that the island formed due to unusual activity in what geologists call the Transition Zone. It’s a region of the Earth’s Mantle about 250 miles below sea level. – No one knew that volcanoes could come about this way. Now that we do know they can, scientists are scrambling to find more examples of this strange phenomenon. Music by Epidemic Sound https://www.epidemicsound.com/ Subscribe to Bright Side : https://goo.gl/rQTJZz
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