the volcano was expanded after its 2013 eruption. The monitors Sabancaya with infrasound detectors, seismometers, surveillance cameras, telemetry units and also uses data from satellites and volcanic ash collectors; it has published a hazard map. In 2005, monitoring commenced of the gas emissions from Sabancaya. Aside from the direct threat of eruptions, Sabancaya also contributes to air pollution in the Colca valley, which can damage plants and cause respiratory distress in animals and humans. Ash clouds from Sabancaya frequently impede air travel over the region; the volcano is one of the most frequent causes of volcanic ash-related air traffic advisories in the world. See also List of volcanoes in Peru Lake Mucurca References Sources Stratovolcanoes of Peru Mountains of Arequipa Region Active volcanoes Andean Volcanic Belt Subduction volcanoes Five-thousanders of the Andes