Mount Tambora’s 1815 Eruption Altered the Planet — Could It Happen Again?

Learn how ash from Mount Tambora changed the planet’s climate. Could another eruption do the same thing?

By Monica Cull
Jan 2, 2025 2:00 PM
mount-tambora-crator-at-sunrise
(Credit: MudaCom/Shutterstock)

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In 1815, Mount Tambora experienced the largest volcanic eruption in recorded history. The eruption's effects altered Earth’s climate for years and even led to the “year without summer” in 1816. Volcanic eruptions occur frequently but rarely at this magnitude.

It’s likely that within the next thousand years, Tambora will violently erupt again, but is the eruption imminent? 

Significance of the 1815 Mount Tambora Eruption 

Mount Tambora is a stratovolcano on the Sumbawa island in Indonesia. The volcano resides along the Sunda Arc — a chain of volcanic islands. Though it has experienced several eruptions throughout history, Mount Tambora is famous for its eruption in 1815.

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