Chile edit Llaima 's 2008 eruption Main articles: List of volcanoes in Chile and Volcanology of Chile The volcanoes in Chile are monitored by the National Geology and Mining Service (SERNAGEOMIN ) 12 13 Earthquake activity in Chile is related to subduction of the Nazca Plate to the east. The Central Volcanic Zone is a major upper Cenozoic volcanic province. 11 Apart from Andean volcanoes, the geology of Bolivia hosts the remnants of ancient volcanoes around the Precambrian Guapor Shield in the eastern part of the country. It is the westernmost of three large stratovolcanoes that trend perpendicular to the Andes along the Gastre Fault. Villarrica, along with. Strong explosions occurred in April 1917, and a lava dome formed in the crater accompanied by hot lahars. Another short explosive eruption in January 1929 also included an apparent pyroclastic flow and a lava flow. A January 6, 2002, nighttime thermal infrared image from ASTER revealed a hot spot in the summit crater, as well as several others along the upper flanks of the volcanos edifice, indicating new volcanic activity.
Himalayas and southern Europe. 4 5 All but three of the world's 25 largest volcanic eruptions of the last 11,700 years occurred at volcanoes in the Ring of Fire. 6 The Ring of Fire is a direct result of plate tectonics : the movement and collisions of lithospheric plates.