1. Andean Volcanic Belt Formed in S. American crustal plate by subduction of the oceanic Nazca Plate. Four main volcanic zones. Varied tectonic settings include rift systems, extensional zones, seamount chains Differences in volcanic zones as well as between neighboring volcanos. Reference: Wikipedia, image reference by Chiton magnificussWikipedia Andean Volcanic Belt Formed in S. American crustal plate by subduction of the oceanic Nazca Plate. Four main volcanic zones. Varied tectonic settings include rift systems, extensional zones, seamount chains Differences in volcanic zones as well as between neighboring volcanos. Reference: Wikipedia, image reference by Chiton magnificussWikipedia Iquique Chile: April 1, 2014 M8.2 megathrust earthquake West coast of northern Chile Triggered 2 meter high tsunami Foreshock sequence began March 16, 2014. Aftershock sequence M4.7-7.8 Last fault rupture: M8.8 in 1877 Iquique Chile: April 1, 2014 M8.2 megathrust earthquake West coast of northern Chile Triggered 2 meter high tsunami Foreshock sequence began March 16, 2014. Aftershock sequence M4.7-7.8 Last fault rupture: M8.8 in 1877 Oceanic Nazca Plate subducts beneath continental S. American plate. Plate convergence rates Plate divergent rates

2. Northern Volcanic Zone Subduction of Nazca under S. America. 74 volcanoes formed by subduction. Extends from Columbia to Ecuador. Nevado del Ruiz is covered by glaciers. Image by Edgar, CC-A-SA 2.0 Northern Volcanic Zone Subduction of Nazca under S. America. 74 volcanoes formed by subduction. Extends from Columbia to Ecuador. Nevado del Ruiz is covered by glaciers. Image by Edgar, CC-A-SA 2.0 Southern Volcanic Zone Flat slab subduction of Juan Fernandez Ridge marks northern boundary. Volcanic gap produced by subduction type. Nevados de Chillán is most active in this region. Image by pabloendemico, CC-A 2.0 Southern Volcanic Zone Flat slab subduction of Juan Fernandez Ridge marks northern boundary. Volcanic gap produced by subduction type. Nevados de Chillán is most active in this region. Image by pabloendemico, CC-A 2.0 Austral Volcanic Zone Formed by subduction of Antarctic Plate under S. American Plate. Glaciated stratovolcanoes, subglacial volcanoes under S. Patagonian Ice Field. Reference: Wikipedia Andean Volcanic BeltAndean Volcanic Belt Austral Volcanic Zone Formed by subduction of Antarctic Plate under S. American Plate. Glaciated stratovolcanoes, subglacial volcanoes under S. Patagonian Ice Field. Reference: Wikipedia Andean Volcanic BeltAndean Volcanic Belt Central Volcanic Zone Subduction of Nazca under S. America. 44 major and 18 minor volcanic centers. Contains 6 active silicic volcanic systems Central Volcanic Zone Subduction of Nazca under S. America. 44 major and 18 minor volcanic centers. Contains 6 active silicic volcanic systems Andean Volcanic Belt

3. Earthquakes in Red Lines Region Large earthquakes,shallow depths 0-70 km Due to crustal and interplate deformation Crustal earthquakes from mountain building in S. American plate Interplate earthquakes due to slipping of Nazca plate Earthquakes in Red Lines Region Large earthquakes,shallow depths 0-70 km Due to crustal and interplate deformation Crustal earthquakes from mountain building in S. American plate Interplate earthquakes due to slipping of Nazca plate Earthquakes in Yellow Line Region Large intermediate depth, 70-300 km Due to internal deformation of Nazca Plate Beneath Chile, Peru, Bolivia, Ecuador Earthquakes in Yellow Line Region Large intermediate depth, 70-300 km Due to internal deformation of Nazca Plate Beneath Chile, Peru, Bolivia, Ecuador Earthquakes in Blue Line Regions Deep focus at 500-650 km None at 300-500 km Due to continued Nazca plate deformation First area runs beneath Peru-Brazil border Second area from central Bolivia to central Argentina. Generally not of large magnitudes. Exception 1994 Bolivia M8.2 at 631 km depth One of the largest deep-focus earthquakes Felt throughout S. and N. America. Reference: U.S. Geological Survey event pageevent page Earthquakes in Blue Line Regions Deep focus at 500-650 km None at 300-500 km Due to continued Nazca plate deformation First area runs beneath Peru-Brazil border Second area from central Bolivia to central Argentina. Generally not of large magnitudes. Exception 1994 Bolivia M8.2 at 631 km depth One of the largest deep-focus earthquakes Felt throughout S. and N. America. Reference: U.S. Geological Survey event pageevent page Earthquake Regions