An investigation of the distribution of eruptive products on the shield volcanoes of the western Galapagos Islands using remotely sensed dataRecent volcanic activity in the Galapagos Islands is concentrated on the two westernmost islands, Isla Isabela and Isla Fernandina. Difficult access has thus far prevented comprehensive geological field studies, so we examine the potential of remotely sensed data as a means of studying volcanic processes in the region. Volcan Wolf is used as an example of the analysis of SPOT HRV-1 data undertaken for each volcano. Landsat TM data are analyzed in an attempt to construct a relative age sequence for the recent eruptive activity on Isla Fernandina. No systematic variation in the surface reflectance of lava flows as a function of age could be detected with these data. Thus it was not possible to complete a study of the temporal distribution of volcanic activity.
Document ID
19930045073
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Munro, Duncan C. (NASA Headquarters Washington, DC United States)
Rowland, Scott K. (NASA Headquarters Washington, DC United States)
Mouginis-Mark, Peter J. (NASA Headquarters Washington, DC United States)
Wilson, Lionel (Univ. of Hawaii at Manoa Honolulu, United States)