Where does this come from, and can I check it?

This Hawaiian shield volcano contains roughly 75 thousand cubic kilometres of rock. 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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Mauna Loa is the world's largest active volcano by volume

This Hawaiian shield volcano contains roughly 75 thousand cubic kilometres of rock

Rising 4,169 metres above sea level on the island of Hawaii, Mauna Loa extends deep below the ocean surface to form a total volume of about 75,000 cubic kilometres. Its immense mass depresses the oceanic crust beneath it by another eight kilometres. It has erupted 34 times since historical record-keeping began in 1843.

Mauna Loa Lava Flows from Early 1900s, Near Hawaiian Ocean View, Hawaii (4529012001) — Ken Lund from Reno, Nevada, USA · CC BY-SA 2.0 · licence · source

Where this comes from

USGS

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Tags: mauna loa, volcano, hawaii

Mauna Loa is the world's largest active volcano by volume: the short answers

Where does this come from, and can I check it?: This Hawaiian shield volcano contains roughly 75 thousand cubic kilometres of rock. 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.