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Underwater volcanoes: how ocean colour changes can signal an imminent eruption


Still Waters
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Posted (IP: Staff) ·

To study volcanoes and interpret whether they’re likely to erupt, scientists mount them with different kinds of measuring equipment. Seismometers help them detect small tremors caused by magma moving under the ground, while gas samplers and thermal cameras can be used to track changes in gas concentrations and temperature as magma ascends from the depths.

It’s rarely acknowledged, however, that most volcanic activity on Earth occurs beneath the sea. Submarine volcanoes are pretty much ubiquitous in all of the world’s major oceans and it’s estimated that 75% of the Earth’s magma output comes from mid-ocean ridges.

To make things trickier, many known submarine volcanoes are found far from land, and being underwater prevents scientists from observing any changes by conventional means. So how do we monitor them?

https://theconversation.com/underwater-volcanoes-how-ocean-colour-changes-can-signal-an-imminent-eruption-175408

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