The summit of San Salvador volcano is truncated by a large steep-walled crater, Boquerón (the mouth), which formed during a major eruption producing the San Andrés Talpetate Tuff about 800 years ago. Eruption of west-directed airfall tephra was accompanied by pyroclastic flows. The small 30-m-high cinder cone, Boqueroncito (the little mouth) is seen in the center of the crater floor of 1.5-km-wide, 500-m-deep Boquerón and was constructed during the 1917 eruption.

Aerial photo by Instituto Geográfico Nacional El Salvador, 1979.

This image is made available under the Creative Commons BY-NC 4.0 license terms.

San Salvador