This is a tectonic map of western Mexico showing the Colima rift and the Colima volcanic complex. Black triangles represent major volcanic centers in the area. Major structural lineaments mark the tectonic depressions of the Colima rift and Tepic-Zacoalco Rifts. G -- Guadalajara City; T -- Tepic; MAT -- Mesoamerican Trench; EPR -- East Pacific Rise; RFZ -- Rivera fracture zone. From Lopez-Loera, H., Urrutia-Fucugauchi, J., and Alva-Valdivia, L.M., 2010, Magnetic characteristics of fracture zones and constraints on the subsurface structure of the Colima Volcanic Complex, western Mexico: Geosphere, v. 6, p. 35-46, doi: 10.1130/GES00204.1.