At this time, the volcano was perfectly quiet. Note rim of Villarrica I caldera in background. There was no activity occurring at this time. Note the small terrace on the far side of the crater, a remnant of the crater fill of 1963-1964. Zoom on the crater of Villarrica during the Austral winter of 1970 or 1971 when there was not even fumarolic activity.
Thick snow mantles the crater rim.
Note the pit left after the 1964 eruption and small terrace on right side. Steam is rising from the inner pit of Villarrica's summit crater. Note section through 1963-1964 tephra deposits on far side of the pit, forming a small terrace. Aerial view of Villarrica during the first phase of the 1971-1972 eruption, taken on 15 December 1971. The summit cinder cone is in vigorous Strombolian eruption.