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Mount Tambora Erupts and Steals the Following Summer · Chronopin

DisasterPosted 09/21/202609/21/2026 at 8:57 pm·@ScienceDesk To timeline

Mount Tambora Erupts and Steals the Following Summer

Starts 04/10/1815

Mount Tambora, Sumbawa, Indonesia

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Weather
Harvest Failure
Mount Tambora
VEI-7
Volcanic Winter
Year Without a Summer

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The source^[1] fixes the climax to the day: "the Mount Tambora eruption reached a violent climax on 10 April 1815", with smaller phreatic activity continuing for months afterwards.

Start: Apr 10, 181590% CONFIDENCEfrom the source

Mount Tambora Erupts and Steals the Following Summer

The most powerful volcanic eruption in recorded history threw 37-45 cubic kilometres of rock into the atmosphere from Sumbawa. Its veil of ash cooled the planet enough to give 1816 the name the Year Without a Summer.

The eruption rated VEI 7 and ejected 37-45 cubic kilometres of dense-rock equivalent material — the most recent confirmed VEI-7 eruption anywhere. [S]
Its climax came on 10 April 1815, though increased steaming and small phreatic eruptions went on for the next six months to three years. [S]
Ash dispersed worldwide and lowered global temperatures, producing the 1816 Year Without a Summer, extreme weather and harvest failures across many regions. [S]
Several climate forcings coincided and interacted in a way not seen after any other large eruption since the early Stone Age. [S]
The Smithsonian Global Volcanism Program holds Tambora's eruption record and confirms the 1815 event as its largest historical eruption. [1]

0

References 290% CONFIDENCE

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]90%
en.wikipedia.org/wiki/1815_eruption_of_Mount_Tambora
en.wikipedia.org· Posted Sep 21, 2026· Starts Apr 10, 1815 ✓· 50% of score
The source fixes the climax to the day: "the Mount Tambora eruption reached a violent climax on 10 April 1815", with smaller phreatic activity continuing for months afterwards.
[2]90%
Global Volcanism Program | Tambora
volcano.si.edu· Added Sep 21, 2026· 50% of score
The Smithsonian's eruption database is the authority for the volcano's identity and eruptive history behind the 1815 event.^[1]

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1Mount Tambora Erupts and Steals the Following Summer

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