Research Spotlight: Magma chamber imaged under Lake Toba


  • Ernie Tretkoff


The Toba caldera in northern Sumatra, Indonesia, was formed about 75,000 years ago by an enormous explosive volcanic eruption that had a significant effect on global climate. To learn more about its underlying crustal structure, Stankiewicz et al. created a three-dimensional image of the magma chamber underneath the lake using a technique called ambient noise tomography, which they applied to seismic noise data recorded by an array of 40 stations around Lake Toba between May and October 2008.