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Ollague volcano

stratovolcano 5868 m / 19,252 ft
Northern Chile, Bolivia and Argentina, South America, -21.3°S / -68.18°W
Current status: dormant (1 out of 5)
Typical eruption style: effusive & explosive
Ollague volcano eruptions: possible eruption in 1903
TimeMag. / DepthDistanceLocation
Sat, 25 Oct
Sat, 25 Oct 19:59 UTCM 4.2 / 94 km17 kmPOTOSI, BOLIVIA
Fri, 24 Oct
Fri, 24 Oct 01:02 UTCM 3.5 / 130.4 km9 km31 km al O de Ollagüe
Tue, 21 Oct
Tue, 21 Oct 19:16 UTCM 3.5 / 143.2 km27 km41 km al S de Ollagüe
Sun, 19 Oct
Sun, 19 Oct 04:55 UTCM 3.3 / 126.7 km36 km46 km al SO de Ollagüe
Thu, 16 Oct
Thu, 16 Oct 23:01 UTCM 3.1 / 135 km37 kmANTOFAGASTA, CHILE
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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.


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)

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