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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: normal or dormant (1 out of 5) | Reports
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, 21 May 2019
Tue, 21 May 02:16 UTCM 3.7 / 121.4 km44 km40 km al NE de Calama (Chile)
Mon, 20 May 2019
Mon, 20 May 08:59 UTCM 3.4 / 111 km39 km52 km al NE de Calama (Chile)
Mon, 20 May 04:04 UTCM 2.7 / 114.6 km33 km54 km al SO de Ollagüe (Chile)
Mon, 20 May 03:51 UTCM 2.5 / 119.2 km38 km48 km al NE de Calama (Chile)
Sun, 19 May 2019
Sun, 19 May 19:29 UTCM 2.5 / 108.1 km34 km52 km al NE de Calama (Chile)
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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