Mount Tambora
A moderate-sized eruption on 5 April 1815 was followed by thunderous detonation sounds that could be heard in Makassar on Sulawesi, at a distance of , Batavia (now Jakarta) on Java, away, and Ternate on the Molucca Islands at from Mount Tambora. On the morning of 6 April 1815, volcanic ash began to fall in East Java, with faint detonation sounds lasting until 10 April.