| Lonquimay | |
|---|---|
 Lonquimay in winter. | |
| Highest point | |
| Elevation | 2,865 m (9,400 ft) |
| Coordinates | 38°22′36″S71°35′00″W / 38.37667°S 71.58333°W /-38.37667; -71.58333 |
| Geography | |
  Lonquimay | |
| Parent range | Andes |
| Geology | |
| Mountain type | Stratovolcano |
| Last eruption | 1988 to 1990 |
Lonquimay Volcano is astratovolcano of late-Pleistocene to dominantlyHolocene age, with the shape of a truncated cone. The cone is largelyandesitic, thoughbasaltic anddacitic rocks are present.[1] It is located in theLa Araucanía Region ofChile, immediately SE ofTolhuaca volcano.Sierra Nevada andLlaima are their neighbors to the south. The snow-capped volcano lies within the protected areaMalalcahuello-Nalcas.
The volcano's last eruption began on December 25, 1988, earning it the nickname "Navidad".[2] The eruption lasted for 13 months before ending in 1990. TheVolcanic Explositivy Index was 3, indicatingtropospheric injections and catastrophic damage. The eruption was from a flank vent and involved mostlyandesite lava, and had been preceded by increased seismicity for three weeks.[3] The volume of the lava flow decreased as time went on and the vent dimensions decreased, though by the end of the eruption the andesite had still built up to a length of 10.2 km.[3]
There was only a single fatality for the duration of the eruption, but it caused the evacuation of over 2000 people and caused extensive damage to farming and livestock in the surrounding region.[2][4]
Research that models the internal architecture of the volcano indicate that Lonquimay has reached its maximum height and that any large eruption oflava will likely occur fromflank vents and not from the summit.[5]
| International | |
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| National | |
| Geographic | |
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