Mapping lava crusts in Pacaya Volcano. Description of risk parameters, temperature, height of the eruption, age, dimensions and volume. This research involves 10 lava crusts which allow us to understand the destruction and the creation they generate. These lava crusts attract tourism, giving identity to Guatemala. Therefore, it is really interesting to study future touristic, sports and leisure uses.

The Pacaya Volcano is one of the most attractive volcanoes in Central America. It is active sinse 1961. Its activity has been concentrated from 1961 until now. Because of the great flow of lava in 2009, the borders of the crusts expanded progressively to the nearby settlements.

There exists a direct relation between the lava discharge and the mean time movement (TADR–time averaged discharge rate). In order to calculate this relation, we must take into consideration the density of lava, its viscosity, its crystalline content and majoritary components. In the Pacaya Volcano, two types of movements are dettected: the mean time of the fast movement of lava –1–10 m3·s−, and the slow one - 0.1–1 m3·s− 1.