Global Volcanism Program | Image GVP-01099
Scientists from the Volcanological Survey of Indonesia make theodolite measurements to determine the height and volume of the growing lava dome at the summit of Merapi volcano in central Java. The pinnacle to the left is the former summit spine of Merapi.
Photo by Ruska Hadian, 1993 (Volcanological Survey of Indonesia).
This image is made available under the Creative Commons BY-NC 4.0 license terms.