Report on Sabancaya (Peru) — 11 January-17 January 2017
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
11 January-17 January 2017
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2017. Report on Sabancaya (Peru). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 11 January-17 January 2017. Smithsonian Institution and US Geological Survey.
15.787°S, 71.857°W; summit elev. 5960 m
All times are local (unless otherwise noted)
Based mostly on webcam views, the Buenos Aires VAAC reported that sporadic gas-and-ash puffs rose from Sabancaya during 11-14 and 16-17 January. Partial satellite views on 13 January revealed an ash plume at an altitude of 7.6 km (25,000 ft) a.s.l. On 16 January a pilot observed an ash plume that had risen to an altitude of 8.2 km (25,000 ft) a.s.l., though meteorological cloud cover prevented satellite and webcam confirmation.
Geological Summary. 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.