Batur (Indonesia)

Status Normal Eruption 2000 1717m
Caldera (Subduction zone / Continental crust (> 25 km))

Batur

The historically active Batur is located at the center of two concentric calderas NW of Agung volcano. The outer 10 x 13.5 km wide caldera was formed during eruption of the Bali (or Ubud) Ignimbrite about 29,300 years ago and now contains a caldera lake on its SE side, opposite the satellitic Gunung Abang cone, the topographic high of the complex. The inner 6.4 x 9.4 km wide caldera was formed about 20,150 years ago during eruption of the Gunungkawi Ignimbrite. The SE wall of the inner caldera lies beneath Lake Batur; Batur cone has been constructed within the inner caldera to a height above the outer caldera rim. The Batur stratovolcano has produced vents over much of the inner caldera, but a NE-SW fissure system has localized the Batur I, II, and III craters along the summit ridge. Historical eruptions have been characterized by mild-to-moderate explosive activity sometimes accompanied by lava emission. Basaltic lava flows from both summit and flank vents have reached the caldera floor and the shores of Lake Batur in historical time.

Batur volcano on the island of Bali was constructed within a 7.5-km-wide inner caldera whose SE margin is obscured beneath the foreground caldera lake, which fills part of the SE floor of an outer 10 x 13 km wide caldera. Batur stratovolcano was constructed as a result of eruptions along a NE-SW-trending line of vents. Historical lava flows have formed much of the far lake shore in this view.

Photo by Sumarna Hamidi, 1973 (Volcanological Survey of Indonesia).

Last updated 2024-03-28 01:10:24