THEMATIC VOLCANO PHOTO GALLERY:
- Strombolian eruption -
Strombolian eruptions are discrete explosions (called
Strombolian explosions, Strombolian bursts etc.) of relatively fluid lava
from a single vent. It is thought that they originate when large gas
bubbles rising within the conduit burst at the partly solid surface of the
magma column inside the vent.
Strombolian eruptions can vary widely
in size. During powerful explosions, ejected lava lumps can reach up to
1000m altitude above the vent, whereas typical Strombolian explosions
throw lava bombs a few tens to a 100-200m height. Weak Strombolian
explosions only eject small amounts of coarse material and mainly release
gasses and ash.
Powerful strombolian activity such as on the photo below left is often accompanied by the emission of lava flows.
Below strombolian explosions on Etna volcano:
Powerful Strombolian explosions at Etna, in 2001 and 1999.
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© Tom Pfeiffer, page last modified on 29 March 2003.