As with many volcanoes in the region, Bravo's eruptions are often characterized by a central vent (caldera) eruption, followed by an explosive eruption and pyroclastic flows. However, it is unique in the fact that its eruption have also produced lava domes in its caldera. Such eruptions occurred in 1720 ± 150 years, 1050 ± 75 years, and 750 AD ± 150 years (through radiocarbon dating). Eruptions consisting of just a central vent eruption and subsequent explosive eruption took place in 1330 ± 75 years, 1310 BC ± 150 years, 1050 BC ± 200 years and 4280 BC ± 150 years.[1]
Source: Wills, Fernando; et al. (2001). Nuestro patrimonio – 100 tesoros de Colombia [Our heritage – 100 treasures of Colombia] (in Spanish). El Tiempo. pp. 1–311. ISBN958-8089-16-6.