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San Juan volcano

Stratovolcano(es) 2240 m / 7349 ft
Mexico, 21.47°N / -104.97°W
Current status: (probably) extinct (0 out of 5) | Reports
San Juan volcano books
Typical eruption style: unspecified
San Juan volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation
No recent earthquakes


Volcán San Juan, the NW-most major volcano of the Mexican Volcanic Belt, overlooks the city of Tepic, the capital of Nayarit state. The northernmost of two twin stratovolcanoes is truncated by a 1 x 4 km wide, oval-shaped caldera formed about 15,000 years ago during an eruption that produced thick rhyodacitic pumice-fall deposits. These are up to 9 m thick beneath Tepic and extensively quarried. This major explosive eruption was followed, probably shortly thereafter, by intra-caldera eruptions of andesitic lava domes and flows. Cerro Alto stratovolcano, the 2240 m high point of the San Juan volcanic complex, is an older volcano that rises immediately to the south of San Juan. Reports of historical eruptions of San Juan in 1742 and 1859 are unconfirmed or incorrect (Luhr, 2000).
Source: Smithsonian / GVP volcano information

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See also: Sentinel hub | Landsat 8

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