Description of thermal anomalies on 2 active Guatemalan volcanos using Landsat Thematic Mapper imagery
Santiaguito Dome, Guatemala, continuously extruded dacite lava and underwent daily, vertical, phreatomagmatic eruptions during 1986 to 1988. Three Landsat satellite Thematic Mapper (TM) subscenes recorded this activity over a two-year period. The subscenes show a stationary, high-temperature thermal amomaly around the active vent, Caliente. Two of the subscenes depict vertical ash eruptions, one of which reached 4.5 to 5 km above the dome. The subscenes provide evidence that a recently detected deep erosional episode on the dome did not begin significantly before February 1988.
At Pacaya Volcano, Guatemala, a basaltic cone in nearly continuous eruption since 1967, a single subscene shows a large, high-temperature thermal anomaly with the characteristics of a basaltic lava flow. Periodic processing of TM images can provide a valuable, supplemental monitoring tool for active volcanoes, particularly when on-site monitoring is limited by economic or personnel resources.
Photogrammetric engineering and remote sensing
Andres, R. J.,
Rose, W. I.
Description of thermal anomalies on 2 active Guatemalan volcanos using Landsat Thematic Mapper imagery.
Photogrammetric engineering and remote sensing,
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