wunder beta

📘 A mountain disappears

In 1815, Tambora on Sumbawa lost much of its summit in an eruption rated VEI 7. Ash, pumice, hot flows, and sulfur gases killed people nearby and later altered sunlight and weather far beyond the shore—two clocks of catastrophe, one immedia

5
lessons
~25 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. Two volcanoes, two catastrophesCompare the physical hazards and human consequences of Tambora and Krakatau.Their scales were different, and so were their deadliest pathways: Tambora's climate legacy and Krakatau's tsunami disaster.
  2. How eruptions reach the atmosphereExplain how sulfur aerosols can turn an eruption into temporary climate disturbance.Ash falls quickly, while sulfur dioxide can become sulfate aerosols that scatter sunlight and alter weather.
  3. 1816: when summer failedConnect Tambora's 1815 eruption to the uneven weather and food crisis of 1816.Cold and wet growing seasons became a food crisis through social and economic vulnerability.
  4. Krakatau after 1883Distinguish Krakatau's historical effects from present-day images and future predictions.The tsunami, atmospheric effects, and active modern landscape belong to connected but different timescales.
  5. Read the evidence across timeUse multiple kinds of evidence to build a careful climate history.Records, proxies, observations, prices, images, and models each reveal one link in the chain.

Questions this course answers

Why can Krakatau and Tambora not be ranked by one simple measure of size?

Physical size does not by itself describe exposure or vulnerability.

Why are sulfate aerosols important after an explosive eruption?

Sulfur dioxide can become stratospheric sulfate aerosols that temporarily alter climate.

What does Year Without a Summer describe most accurately?

It is vivid shorthand for an uneven climate shock, not literal permanent winter.

What makes attribution from Tambora to 1816 convincing?

Converging evidence connects mechanism and consequence while preserving uncertainty.

Grounded in trusted sources

  • U.S. Geological Survey, Krakatau 1883, https://www.usgs.gov/publications/krakatau-1883
  • U.S. Geological Survey, Hazards and climatic impact of subduction-zone volcanism, https://www.usgs.gov/publications/hazards-and-climatic-impact-subduction-zone-volcanism-a-global-and-historical
  • U.S. Geological Survey, MSH Comparisons With Other Eruptions, https://pubs.usgs.gov/gip/msh/comparisons.html
  • Denig and McVaugh, Early American sunspot drawings from the year without a summer, NOAA, https://repository.library.noaa.gov/view/noaa/45591
  • Rampino and Self, Historic eruptions of Tambora, Krakatau, and Agung, https://pubs.usgs.gov/pinatubo/self/index.html
  • U.S. Geological Survey, Which volcanic eruptions were the deadliest?, https://www.usgs.gov/faqs/which-volcanic-eruptions-were-deadliest

Every Wunder lesson is built from real, reputable sources — never invented.

Related courses

📘Tambora changes the shape of an island📘Two ships leave with a modern promise📘At the edge of Ogygia, home is still a decision📘A corner gives the wheels unequal journeys📘A jet begins in several countries📘Begin on the Dover road📘The ocean is outside, but the crew is inside📘Stand on a cliff and wait

Wunder is a personalized learn-anything platform — tell it any topic and it builds a beautiful, fact-checked course in minutes, with narration, a knowledge check, and a college-style University track.

All topics · Home

© 2026 Wunder Learning LLC · Terms & Privacy