P E R U

Sabancaya, an andesitic/andes.-basaltic/dacitic stratovolcano with several lava domes is located 70km northwest of the city of Arequipa and 20km south of abt. 20 smaller towns. Its latest eruptions were two VEI 2 in 2000 and 2003; from mid-2014 hightened volcanic seismicity, a constant steam plume and occasional explosions had been reported. Eruption proper began in November 2016; it is still going on and so far rated a VEI 3.

Peru: SABANCAYA 2   O-IMG   30 sec.   O-Web    

El Misti, a conic andesitic stratovolcano, is situated 18km NE of the center of the city of Arequipa. Its crater is 550m wide and 200m deep with a lava dome 100m in diameter at the floor, whose fractures emanate fumaroles. Latest activity was an occasional increase of HT and two seismic swarms (more than 100 events per day) in May and June 2014 [IGP]. The only eruption since 1870 took place in 1985, both VEI 1 [GVP].

Tixani, of dacitic composition, shows a fresh-looking lava field at the NW base of the volcano. A major debris avalanche produced by collapse of the volcano partially filled the Río Tambor to the south. Emplacement of three lava domes since the end of the Pleistocene was accompanied by explosive eruptions. No historical eruptions are known from Ticsani, but fumarolic activity continues, and pumice from the crater containing the youngest lava dome overlies tephra from the 1600 AD Huaynaputina eruption. Recently, some earthquake swarms caused the volcano observatory to publish seismograms and monthly activity reports.