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- Apr 10, 181590% CONFIDENCEfrom the source
Mount Tambora Erupts and Steals the Following 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]
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_Tamboraen.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 | Tamboravolcano.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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