The eruption of Mount Tambora was the largest in recorded human history — so violent it hurled enough ash into the stratosphere to dim the entire planet. A world away and a year later, 1816 became 'the Year Without a Summer': killing frosts in July, famine across two continents, blood-red sunsets, and a rainy Swiss holiday that gave us Frankenstein and the ancestor of the bicycle. The volcano nobody in Europe had ever heard of quietly rewrote history.
Start with the whole arc: how a single Indonesian volcano produced a global catastrophe that killed people who never saw a wisp of its smoke. The context you need before the rabbit hole gets strange.
The blast itself in cold numbers: a VEI-7 eruption, a bang heard 2,600 km away, roughly 100 cubic kilometres of rock ejected, and a mountain that lost 1,400 metres of its own height in a matter of days.
How ash and sulfate aerosols the size of a continent hung in the stratosphere for months, scattering sunlight and cooling the whole planet by degrees that were catastrophic for anyone growing food.
The view from New England: snow in June, frost every month of the year, corn that never ripened, and 'Eighteen Hundred and Froze to Death' etched into American memory as farms failed and families fled west.
First-hand accounts of the disaster year: killing frosts in July and August, birds dropping dead, livestock starving, and the desperate improvisation of people who had no idea a volcano was to blame.
The strangest turn: trapped indoors by relentless cold rain on Lake Geneva, Mary Shelley conceived Frankenstein and Byron wrote 'Darkness' — while the same gloom drove an inventor to build the first two-wheeled 'running machine.'
The closing survey: Turner's luminous painted sunsets, a typhus and cholera surge, bread riots and the last great subsistence crisis in the Western world — all traceable to one mountain on the far side of the planet.