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San Pedro volcano

stratovolcano 6145 m / 20,161 ft
Northern Chile, Bolivia and Argentina, South America, -21.88°S / -68.4°W
Current status: dormant (1 out of 5)
San Pedro volcano books
Typical eruption style: explosive and effusive
San Pedro volcano eruptions: 1960(?), 1938, 1923(?), 1917(?), 1916(?), 1911, 1901, 1891(?), 1877(?), 1870(?)
TimeMag. / DepthDistanceLocation
Fri, 24 Nov
Fri, 24 Nov 00:12 UTCM 3.4 / 112.6 km32 km56 km al NE de Calama
Thu, 23 Nov
Thu, 23 Nov 05:53 UTCM 2.4 / 133.1 km29 km58 km al SO de Ollagüe
Thu, 23 Nov 02:29 UTCM 3.2 / 125.9 km24 km70 km al SO de Ollagüe
Wed, 22 Nov
Wed, 22 Nov 12:06 UTCM 3.5 / 112.6 km32 km66 km al N de Calama
Wed, 22 Nov 07:54 UTCM 3.1 / 118.4 km13 km67 km al S de Ollagüe
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San Pedro volcano in the Atacama desert of northern Chile is one of the highest active volcanoes in the world.
San Pedro volcano is a twin volcano with 2 peaks, San Pedro (the western summit) and the older sister volcano San Pablo (6092 m) in the east.

A large debris avalanche, similar to the one at Mt St Helend in 1980, occurred at San Pedro in the past, and the present-day cone grew within the depression. The debris avalanche deposit is visible on the western lower slopes of San Pedro.
Thick dacitic lava flows with steep-sided fronts cover the upper slopes of San Pedro's cone which has a crater. There is a young-looking scoria cone on the western flank (La Poruña), which erupted an 8 km-long lava flow about 103,000 years ago.
Reports of varying degrees of reliability have recorded a number of eruptions in the past centuries.

Note: a volcano with the same name is at Lake Atitlán in the Guatemalan Highlands, forming the prominent group of San Pedro, Tolimán, and Atitlán volcanoes.

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