On 10 April 1815, Mount Tambora in the Dutch East Indies (modern-day Indonesia) erupted with unprecedented force, producing the most powerful volcanic explosion in recorded history.
The eruption killed an estimated 71,000 people, both directly and through famine and disease, and released massive ash clouds into the atmosphere, triggering a global volcanic winter and severely disrupting weather patterns—most notably causing the “Year Without a Summer” in 1816 across the Northern Hemisphere.