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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
Tue, 30 May
Tue, 30 May 05:13 UTCM 3.4 / 118.9 km41 km45 km al NE de Calama
Tue, 30 May 02:53 UTCM 3.3 / 135.5 km26 km52 km al SO de Ollagüe
Sun, 28 May
Sun, 28 May 10:59 UTCM 3.1 / 113 km25 kmANTOFAGASTA, CHILE
Sat, 27 May
Sat, 27 May 20:29 UTCM 2.8 / 109.9 km20 km67 km al NE de Calama
Wed, 24 May
Wed, 24 May 21:09 UTCM 2.5 / 111.2 km45 km63 km al SO de Ollagüe
View all recent quakes
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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