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Measuring the Greatest Ocean Depth

But the average depth of the ocean floor is around 12, feet and in some places much deeper! Exploration with submersibles began with vehicles called bathyspheres in the s. These were simply steel balls lowered from a ship with two people inside. The most famous bathyscaph is the Trieste.

The water pressure at this spot is eight tons per square inch! If you set Mt.

How to get Inside Giant's Deep (Ocean Depths)

Everest down on the bottom of Challenger Deep, there would still be more than a mile of water above it! This craft has three windows and can carry two scientists and a pilot. It is easy to maneuver and is fully outfitted with lights, video cameras, clawed arms, temperature probes, and more.

Exploring the Challenger Deep

Since Alvin has made more than 4, dives carrying scientists that study the geology, biology, and chemistry of the deep ocean. This submersible discovered life at hydrothermal vent sites almost 30 years ago, recovered a hydrogen bomb accidentally dropped in the Mediterranean Sea, and has explored the wreck of the Titanic. It continues today to study the creatures of the deep. In spite of exploration with manned submersibles like Alvin and unmanned remote-controlled submersibles, the deep ocean is still a vast territory of unknowns.

There is work to be done for deep-sea explorers for many years to come! If someone asked you what the biggest animal in the world is, what would you say? You might say an elephant, and that would be a good guess. The African elephant is the biggest land mammal, weighing nearly 14, pounds, or seven tons. The blue whale is so big that its tongue weighs as much as an elephant does! It can grow to be over feet long and weigh more than tons — , pounds!

Deepest Part of the Ocean - Deepest Ocean Trench

Its heart is the size of a small car, and it circulates seven tons of blood in its body. With that size, a blue whale can only live in the ocean.


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Out of the water, its skeleton would collapse under its own body weight. To see how long a blue whale really is, get feet of string and a friend. Go outside and stretch the string out between you. Can you imagine a whale that big? Blue whales are mammals, not fish. This means they have lungs instead of gills, and have to come up to the surface of the ocean to breathe. While our bodies breathe automatically, blue whales can choose when to breathe — they usually take a breath times per minute, but they can hold their breath for almost an hour.

Formed by the subduction of the Pacific plate under the Indo-Australian Plat, the Kermadec Trench has a maximum depth of 1o. Along with the Tonga Trench to the north, the Kermadec Trench creates the 2, km-long, near-linear Kermadec-Tonga subduction system.

How deep is deep? Imagining the MH370 search underwater

The trench is also home for a variety of species including a species of giant amphipod, measures approximately 34 cm in length, at the bottom of the trench. A few years ago, the Kermadec Trench was in news after the Nereus, an unmanned research submarine, imploded because of the high pressure at a depth of 9, meters while conducting explorations at the Kermadec Trench.

Also known as Izu-Bonin Trench, this deep trench stretches from Japan to the northern section of Mariana Trench and it is also an extension of the Japan Trench. Another deep submarine trench located east of the Japanese islands, Japan trench as shown in image above is part of the Pacific Ring of Fire in the northern Pacific Ocean. With a maximum depth of 9 km, the Japan trench stretches from the Kuril Islands to the Bonin Islands and is also the extension of the Kuril-Kamchatka Trench and the Izu-Ogasawara Trench to the north and south respectively.

The trench was formed due to the subduction of the oceanic Pacific plate beneath the continental Okhotsk Plate. Lies at a depth of 8.


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  • Efforts for complete mapping of this trench have been undergoing on for a quite long time now. This South Sandwich Trench is also associated with an active volcanic arc. The Atacama Trench has a maximum depth of 8. The deepest point of the trench is known as Richards Deep. The trench measures around 5, km in length and 64 km in mean width while it covers an area of about , square kilometres.

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