No latest activity reported for Bratan.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. {IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior}.

Latter J H, 1975b. The history and geography of active and dormant volcanoes. A worldwide catalogue and index of active and potentially active volcanoes, with an outline of their eruptions.. {Unpublished manuscript}, unpaginated

Marinelli G, Tazieff H, 1968. L'Ignimbrite et la caldera de Batur (Bali, Indonesia). {Bull Volc}, 32: 89-120

Reubi O, Nicholls I A, 2004. Variability in eruptive dynamics associated with caldera collapse: an example from two successive eruptions at Batur volcanic field, Bali, Indonesia. {Bull Volc}, 66: 134-148

Sutawidjaja I S, 2000. A guide to the geological phenomena of Batura caldera, Bali, Indonesia. {IAVCEI General Assembly, Bali 2000 Excursion Guide}, 33 p

Wheller G E, 1986. Petrogenesis of Batur caldera, Bali, and the geochemistry of Sunda-Banda arc basalts. {Unpublished PhD thesis}, Univ Tasmania, 156 p

The 11 x 6 km wide Bratan caldera (also known as Catur or Tjatur caldera or the Buyan-Bratan volcanic complex) in north-central Bali contains three caldera lakes. Several post-caldera stratovolcanoes straddle its southern rim; the largest post-caldera cone, Batukau, is 10 km to the SW. The cones are well-formed, but covered with thick soils and vegetation; they are thought to have been inactive for hundreds or thousands of years (Wheller, 1986). Tapak and Lesong cones are not covered by deposits of the youngest dacitic pumice eruptions of nearby Batur volcano, and are thus <23,000 years old. The Buyan-Bratan geothermal field within the caldera has been developed to produce electrical power, and hot springs are located in more than a dozen locations.