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Measuring the Colossu

2026-10-0820:05

When people hear that Mauna Loa is one of the largest volcanoes on Earth, the first thing they often think about is its height.A mountain that rises more than four kilometers above sea level definitely seems huge.However, height alone doesn't fully explain Mauna Loa.In fact, measuring the volcano only from sea level hides much of what makes it special.Mauna Loa is massive in three dimensions.It rises into the atmosphere, extends downward

Building the Giant,How a Shield Volcano Grows

2026-10-0222:44

There is a specific moment in the life of every Hawaiian volcano when a hidden process beneath the Pacific Ocean starts to create something that can eventually be seen from space.Melt generated deep within the Earth's mantle rises toward the surface.This molten rock erupts onto the ocean floor.One lava flow covers another.A new layer of basalt forms.Then another.And another.At first, the entire structure is completely hidden beneath

The Pacific Plate and the Trail of Volcanoes

2026-09-2921:33

The story of the Hawaiian hotspot goes beyond the idea of a hot area deep beneath the Pacific Ocean.Knowing that there is heat beneath Hawaiʻi is just the start.The real question is what happens after that.How does heat from deep inside the Earth become molten rock?How does that molten rock move through thousands of kilometers of solid mantle?How does it eventually reach the oceanic crust?And how does part of that magma form a volcano as

The Hawaiian Hotspot,The Furnace Beneath Hawaii

2026-09-2616:57

The Hawaiian Islands lie in the middle of the Pacific Ocean, far from the nearest major boundary between tectonic plates.This location has long been a key clue in understanding the islands.Most of the world's active volcanoes are found near or along the edges of these tectonic boundaries, where huge sections of the Earth's crust meet, pull apart, or slide past each other.Hawaiʻi is an exception.The volcanoes here are located within

From Seafloor Volcano to Giant Shield

2026-09-1918:26

The story of Mauna Loa does not truly begin at its peak, nor does it start when the first lava emerged above the Pacific Ocean.Its most profound origin lies deep beneath the seafloor, in a place where rocks behave in ways that seem almost impossible to us in our daily lives.Here, immense pressures are applied to minerals, temperatures soar to thousands of degrees, and materials that are normally solid can slowly change shape and flow over

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