Global Volcanism Program | Image GVP-05117
Volcanologists Richard Fiske and Keith Rowley drill a boulder on the east flank of Soufrière St. Vincent volcano to install benchmarks for deformation surveys. These surveys allow detection of inflation of the volcano that often occurs prior to eruptions.
Photo by John Shepherd, 1989 (University of West Indies).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.