Which volcano produced the most recorded fatalities in a single eruption?

Mount Tambora’s 1815 eruption was a colossal VEI-7 event on the island of Sumbawa, then part of the Dutch East Indies. The explosion killed tens of thousands immediately and triggered famine and disease across the region, bringing the total death toll to roughly 71,000. It also injected huge amounts of ash and sulfur into the atmosphere, helping cause the global cooling of 1816, the "Year Without a Summer." Tambora remains one of the most important eruptions in climate history because its effects were felt far beyond Indonesia. Its summit was reduced by about 1,400 meters after the eruption.