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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
Sat, 18 Mar
Sat, 18 Mar 07:36 UTCM 2.8 / 128.2 km27 km73 km al NE de Calama
Fri, 17 Mar
Fri, 17 Mar 19:19 UTCM 3.0 / 131.3 km30 km43 km al SO de Ollagüe
Fri, 17 Mar 01:14 UTCM 2.8 / 108.5 km32 km59 km al SO de Ollagüe
Thu, 16 Mar
Thu, 16 Mar 08:21 UTCM 2.8 / 103.1 km35 km71 km al NE de Calama
Thu, 16 Mar 07:35 UTCM 3.7 / 108.9 km24 km63 km al NE 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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