Ask a Teacher

Search



An great example for volcanic tsunami
Volcanic earthquakes, undersea eruptions, pyroclastic flows, caldera collapse, landslides, lahars, phreatomagmatic eruptions, lava bench collapse, and airwaves from large explosions produce Volcanic Tsunamis. A submarine or offshore volcanic eruption can produce high magnitude lifts on seafloors, which pushes large water columns upwards to generate tsunami. These submarine volcanoes form high slope pillars over their craters as compared to their on surface counterparts, which is due to the rapid cooling effect of water and buoyancy. Another considerable fact is the failure of a submarine volcano's slope which results in sudden disturbance of water resulting in tsunami waves.

Waves produced by volcanic tsunamis can be as high as those produced by the largest earthquakes. The most devastating volcanic tsunami recorded was that produced by the eruption of Krakatoa, Indonesia in 1883. The waves had runup heights of 40 m and killed 36,000 people and it washed away 165 coastal villages on Java and Sumatra.


comments powered by Disqus