Lateral eruption

The directed nature of the blast may cause damage at much greater distances from the peak than a summit eruption would have.

Pyroclastic flows and lahars can affect areas originating from the volcano roughly in the shape of a cone that can span hundreds of square kilometers.

Volcanic activity beginning in March 1980 saw magma accumulating underneath the mountain's north flank.

It underwent a lateral eruption on May 8, 1902, killing 28,000 people in the deadliest volcanic event of the 20th century.

San Francisco Peaks in Arizona are the remnants of a single taller volcano that may have had a lateral eruption around 200,000 years ago.