Report on Sabancaya (Peru) — 20 February-26 February 2013
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 20 February-26 February 2013
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2013. Report on Sabancaya (Peru). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 20 February-26 February 2013. Smithsonian Institution and US Geological Survey.
15.787°S, 71.857°W; summit elev. 5960 m
All times are local (unless otherwise noted)
According to news articles, INGEMMET recorded 536 earthquakes from Sabancaya, or about 20 per hour, during 22-23 February. About 80 homes were damaged by the earthquakes, causing some evacuations. A plume rose 100 m; plumes had been intermittently visible since 15 January.
Geologic Background. Sabancaya, located in the saddle NE of Ampato and SE of Hualca Hualca volcanoes, is the youngest of these volcanic centers and the only one to have erupted in historical time. The oldest of the three, Nevado Hualca Hualca, is of probable late-Pliocene to early Pleistocene age. The name Sabancaya (meaning "tongue of fire" in the Quechua language) first appeared in records in 1595 CE, suggesting activity prior to that date. Holocene activity has consisted of Plinian eruptions followed by emission of voluminous andesitic and dacitic lava flows, which form an extensive apron around the volcano on all sides but the south. Records of historical eruptions date back to 1750.