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Report on Guallatiri (Chile) — 15 July-21 July 2015


Guallatiri

Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 15 July-21 July 2015
Managing Editor: Sally Sennert.

Please cite this report as:

Global Volcanism Program, 2015. Report on Guallatiri (Chile) (Sennert, S, ed.). Weekly Volcanic Activity Report, 15 July-21 July 2015. Smithsonian Institution and US Geological Survey.

Weekly Report (15 July-21 July 2015)

Guallatiri

Chile

18.42°S, 69.092°W; summit elev. 6071 m

All times are local (unless otherwise noted)


On 7 July OVDAS-SERNAGEOMIN reported that the Alert Level for Guallatiri was lowered to Green (the lowest level on a four-color scale) because activity had returned to the baseline levels observed prior to the Alert-Level increase in May. Baseline levels were characterized by low levels of seismicity, no deformation, and white emissions.

Geological Summary. One of northern Chile's most active volcanoes, Volcán Guallatiri is a symmetrical ice-clad stratovolcano at the SW end of the Nevados de Quimsachata volcano group. It lies just W of the border with Bolivia and is capped by a central dacitic dome or lava complex, with the active vent situated on its S side. Thick lava flows are prominent on the lower N and W flanks of the andesitic-to-rhyolitic volcano. Minor explosive eruptions have been reported since the beginning of the 19th century. Intense fumarolic activity with "jet-like" noises continues, and numerous solfataras extend more than 300 m down the W flank.

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)