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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
Sun, 17 Sep
Sun, 17 Sep 00:08 UTCM 2.7 / 126 km20 km76 km al NE de Calama
Sat, 16 Sep
Sat, 16 Sep 05:16 UTCM 3.8 / 114 km48 kmANTOFAGASTA, CHILE
Thu, 14 Sep
Thu, 14 Sep 16:26 UTCM 3.1 / 118.3 km23 km65 km al SO de Ollagüe
Wed, 13 Sep
Wed, 13 Sep 14:06 UTCM 3.7 / 117.2 km24 km54 km al SO de Ollagüe
Wed, 13 Sep 07:09 UTCM 2.6 / 105.2 km35 km66 km al N de Calama
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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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