Ticsani

Ticsani
The Ticsani lava dome complex (center)
Highest point
Elevation	5,408 m (17,743 ft)
Coordinates	16°46′03″S 70°35′59″W / 16.76750°S 70.59972°W / -16.76750; -70.59972Coordinates: 16°46′03″S 70°35′59″W / 16.76750°S 70.59972°W / -16.76750; -70.59972
Geography
Ticsani Peru
Location	Moquegua Region
Parent range	Andes
Geology
Mountain type	Lava domes
Last eruption	1800 ± 200 years

Ticsani or Tixani is a volcano in the Andes of Peru, about 5,408 metres (17,743 ft) high. It is situated in the Moquegua Region, Mariscal Nieto Province, in the districts of Cuchumbaya and San Cristóbal. Ticsani, Ubinas and Huaynaputina sit on a volcanic lineament slightly oblique to the main volcanic front, and Ticsani and Huaynaputina are the product of discrete silicic eruptions and appear to share a geochemical source. The volcano is of dacitic composition and has been K-Ar dated to be 190000 years old. The volcano was constructed in several steps, starting from lava flows and volcaniclastics. This system collapsed westward leaving a 3 km (1.9 mi) long NW-SE ridge. In the middle Holocene, three andesitic lava domes formed with explosive eruptions. These were later overlaid with brown pumice and bombs from a later phreatomagmatic eruption. The activity of this system ended with the emplacement of the Ticsani lava dome. One dacitic pumice fall of 0,4 km³ has been dated ca 11600 yr BP.

Ticsani was one of the volcanoes ascended in summer 1902 by Francisco Alayza Paz Soldan.

In May 1999, inhabitants of the neighbouring towns of Calacoa, Cuchumbaya and Carumas noticed earthquake swarms with the maximum strength magnitude 3.5 at a minimum depth of 50 kilometres (31 mi), raising fears of a reactivation of the volcanic system. Between November 2005 and September 2006 a swarm of earthquakes on the NE side was observed, resulting in surface deformation in the northwest sector of the volcano and subsidence in its southeast sector.