Global Volcanism Program | Image GVP-11629
This composite view looks west from the NE rim of Sierra Negra's caldera (right) on October 23, 2005. The caldera floor is to the left. Four active vents are superimposed in this photo, aligned along the E-W fracture that lies at the base of the inner caldera wall. Numerous lava flows descended southwards to the left where they joined to form one single flow of a'a lava ~ 1 km wide and 7 km long that had already reached the southern inner wall of the caldera on the 23rd.
Photo by Minard Hall, 2005 (Escuela Politecnica Nacional, Quito).
This image is made available under the Creative Commons BY-NC 4.0 license terms.