Ollague Volcano
Updated: 29 avril. 2024 09:35 GMT -
stratovolcano 5868 m / 19,252 ft
Chile / Argentine (nord) + Bolivie (Amérique du Sud), -21.3°S / -68.18°W
Condition actuelle: normal / en sommeil (1 sur 5)
Chile / Argentine (nord) + Bolivie (Amérique du Sud), -21.3°S / -68.18°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 7 janv. 2023 (Volcanic Ash Advisory)
Volcán Ollagüe (also known as Oyahué) is a massive andesitic stratovolcano in northern Chile on the border with Bolivia. It contains a dacitic summit lava dome. No historical eruptions have been confirmed from Ollagüe, but there is intense fumarolic activity and a persistent steam plume emanates from a fumarole on the south side of the summit dome.
There are active sulphur mines on the upper western and southern flanks of the volcano which are serviced by a now disused switchback road which reaches 5650 m elevation and rank as one of the highest in the world.
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Eruptions du volcan Ollague: possible eruption in 1903
Derniers séismes proches
| Heure | Mag. / Profondeur | Distance / Lieu | |||
| 24 avril 14:55 (La Paz) | 2.7 160 km |  Potosi, Bolivia | Info | ||
| mardi, 23 avril 2024 GMT (1 séisme) | |||||
| 23 avril 09:34 (Santiago) | 2.8 121 km |  Chile: 21 km al SO de Ollagüe | Info | ||
| lundi, 22 avril 2024 GMT (2 séismes) | |||||
| 22 avril 08:57 (Santiago) | 2.7 137 km | Chile: 24 km al SO de Ollagüe | Info | ||
| 21 avril 21:49 (La Paz) | 2.9 166 km | 24 km au nord-est | Potosi, Bolivia | Info | |
| samedi, 20 avril 2024 GMT (1 séisme) | |||||
| 19 avril 20:48 (Santiago) | 3.1 140 km | 25 km au sud-ouest | Chile: 31 km al S de Ollagüe | Info | |
Introduction
Ollague Volcano suffered flank collapse during the Pleistocene and produced a large debris-avalanche deposit which extends westward and separates the Salar de San Martín from the Salar de Ollagüe salt flats.3 youthful-looking silicic lava flows were emplyed after the collapse, but are probably still older than the last glaciation about 11,000 years ago.
A youthful-looking scoria cone on the lower WSW flank, La Poruñita, was long believed to be relatively young, but has been dated to an age of 420,000 to 680,000 years.
(Source: Smithsonian Global Volcanism Program)
Latest satellite images
