Which volcano caused the deadliest eruption in modern history?

The 1815 eruption of Mount Tambora, on Sumbawa in present-day Indonesia, is the deadliest volcanic eruption in modern history. The eruption killed an estimated 10,000 people immediately through pyroclastic flows, ash, and collapse effects, while the wider regional food crisis raised the total death toll dramatically. Tambora also injected so much ash and sulfur into the atmosphere that 1816 became known as the “Year Without a Summer.” That global cooling affected harvests in Europe and North America.