Because of the volcanoes .. Bubbles the size of pyramids over the oceans

Little Mohamed Western

A team of researchers from the US Geological Survey and the University of Alaska has been able to estimate the size of bubbles formed by underwater volcanoes by listening to the sound waves generated by those bubbles.

In their research published in the journal Nature Geoscience on October 14, the researchers analyzed recordings of low-frequency sound waves in the atmosphere (called subsonic) produced by more than 70 eruptions of the Bogslov volcano on the Pacific Ocean off the coast of the Pacific Ocean. Alaska between 2016 and 2017.

A water dome over the ocean
We usually associate volcanic eruptions with mountain peaks that throw “magma” into the atmosphere, but we forget that about 70% of all Earth's volcanoes are deep in the oceans, and their study remains a major challenge for scientists, so these geological formations retain a lot of Its secrets so far.

One of the secrets is that eyewitnesses frequently watched giant bubbles appear on the surface of the ocean before they burst into the air, releasing gases and particles directly from volcanic eruptions beneath the surface.

One was also below an eyewitness aboard the Albatross in 1908 to describe a "giant soap bubble" rising from the ocean, with "enormous clouds of smoke and steam," while other reports indicated a massive bulge resembling a large dome of water in The size of the Washington Capitol Dome.

In this new study, the researchers reported that perseverance and luck allowed them to come up with a scientific explanation for these mysterious historical descriptions of the enormous gas bubbles and how these explosions occurred beneath the surface of the ocean, where scientists succeeded in placing devices in the depths of the ocean near the volcano Bogslov during its eruption in 2016 and 2017 Capture the sound waves from it.

Bubbles the size of pyramids
After studying low-frequency ultrasound, the researchers found that they were produced by the formation of an underwater bubble, and they also found that the bubbles oscillated, suggesting that they were changing in size.

The authors explain in their research that "sound waves emanate from the fluctuation and rupture of gas bubbles.

A second, deeper study of the ultrasound enabled researchers to track the progress of the bubbles as they reached the surface and measure their size.

The results showed that the arrival of a single bubble to the surface pushes water over it in the form of a dome, and because of exposure to variable pressure, the bubble expands and shrinks several times, before it finally collapses, and during its collapse, the gases and other substances in the bubble escape into the atmosphere, forming a huge column.

The researchers reported that they measured bubbles up to 440 meters in diameter, which means that these bubbles are huge in size can contain the pyramids of Giza easily.