Index
Stratovolcanoes
Ash Plume
Cooling After a Volcanic Eruption
Mt. Pinatubo's Contribution to Climate Change
Strange Weather & Hazard Map
Sources
STRATOVOLCANOES

Physical Characteristics:

• gentle lower slopes

• steep upper slopes

• concave upward

• small summit crater

 

Plinian Eruption Type: A highly explosive eruption with ash plumes as high as 45 kilometers into the stratosphere.

Mount Pinatubo's eruption was caused by the subduction of the Manila Fault. This is found on the western side of the Pacific Ring of Fire.

Stratovolcanoes are typically found on top of subductoion faults. A stratovolcano’s main feature is a large magma reservoir inside the earth’s crust which gets built up over time. This large magma reservoir is built up from the melting end of the subducting plate. The magma of stratovolcanoes is produced relatively slower by this process, so it tends to be thicker, holding more gas and pressure. The gas and pressure builds up over time. This slower volcanic process, in effect, causes the period of time between stratovolcanic eruptions to be longer.

The long return interval of stratovolcanic eruptions does not come without a price. Because the gas and pressure build up so greatly over time, the eruptions when they occur are the most violent kind of vocanic eruptions.

This gives stratovolcanoes the ability have eruptions big enough to affect and change the world's climate.

More Information on Stratovolcanoes

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