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Measured from its underwater base on the ocean floor it reaches over 10 kilometres. The figure is taken from USGS, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the Records & Extremes shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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Mondo Knows Facts

Mauna Kea is the tallest mountain on Earth from base to peak

Measured from its underwater base on the ocean floor it reaches over 10 kilometres

While Mount Everest has the highest altitude above sea level, Mauna Kea in Hawaii is the tallest mountain overall. Its base sits on the ocean floor about 6,000 metres deep, and its summit rises 4,207 metres above sea level. This gives the shield volcano a total height of about 10,210 metres.

Mauna Kea Hawaii - Flickr - Eric Tessmer, Honolulu Hawaii — Eric Tessmer from Honolulu Hawaii, USA · CC BY 4.0 · licence · source

Where this comes from

USGS

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Mauna Loa is the world's largest active volcano by volumeThis Hawaiian shield volcano contains roughly 75 thousand cubic kilometres of rock Kilauea is one of the world's most active shield volcanoesContinuous eruptions from 1983 to 2018 added hundreds of acres of new land Mount Everest is the highest peak above sea levelIts summit stands at 8,848 metres above the ocean Mount Tambora produced the largest volcanic eruption in recorded historyThe 1815 explosion ejecta triggered the famous Year Without a Summer The tallest active geyser is Steamboat in YellowstoneIts eruptions can throw water more than 100 metres up Duke Kahanamoku took surfing to the worldThe Hawaiian swimmer won Olympic golds in 1912 and 1920

Tags: mountain, hawaii, volcano

Mauna Kea is the tallest mountain on Earth from base to peak: the short answers

Where does this come from, and can I check it?: Measured from its underwater base on the ocean floor it reaches over 10 kilometres. The figure is taken from USGS, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a records & extremes fact?: Yes. It sits on the Records & Extremes shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.