If Chaiten, Llaima and Puyehue weren’t enough, the Chilean Regional Emergency Office is placing seismometers on Peteroa volcano after its shown signs of increasing activity. The volcano is located out on the border with Chile and Argentina and has a number of glaciers that start from the edifice. Looking at the eruptive history of Peteroa, it seems that it has spasms every 30 years or so, although the last known eruption was ~10 years ago. The eruptions are mostly phreatic explosions (related to magma-water interaction) and the last known eruption that produced significant lava, ash and lahars was in 1837 (along with another in 1762).
nnAnother day, another development at Chaiten. Military stationed near the volcano helping with evacuations reported “booming noises” and saw incandescent blocks getting hurled from the vent area. This suggests that lava is […]