Volcanic activity can present unpredictable disasters to city populations living within regions and for people traveling in
plane that intersect with ash-laden eruption clouds. Methods of monitoring volcanic activity include searching for
variations in the thermal anomaly, clouds resource and subsidence deformation from active volcano. Over any active
volcanoes, low spatial resolution satellite image are used to identify changes in eruptive activity, but are of insufficient
spatial resolution to map active volcanic features. The Landsat data can be used to identify the thermal characteristics of
a series of lava flows at Fuego volcano and Pacaya volcano, Guatemala. We use Landsat TM/ETM+ 7, 5, 4 (displayed in
red, green, and blue, respectively) false-color composite of the research region, acquired on 18 December 1989 and 23
January 2000 to indicate the volcano image features which appear halo structure with blue red and yellow. The
interpretation flag is obvious which indicate the difference temperature of volcano crater. Spatially varying haze emitted
by volcano activity is identified and removed based on Improved Haze Optimized Transform (HOT) which is a robust
haze assessing method. With improved spatial resolution in the thermal IR, we are able to map the bifurcation and
braiding of underground lava tubes. With higher spatial resolution panchromatic data, we are able to map lava flow
fields, trace very high temperature lava channels, and identify an accurate feature associated with a collapsed crater floor.
At both Fuego and Pacaya, we are able to use the thermal data to estimate temperature. We can monitor the dynamic
change of the two volcanoes using two difference date Landsat data.