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What does VEI reveal about morphological differences between venusian and…
What does VEI reveal about morphological differences between venusian and earth volcanoes?
Introduction
Comparing trends in volcanic activity on Earth and Venus
Focus is on the VEI: volcanic activity index
Measures eruptions based on magnitude and intensity
Why they are bing compared
Features that influence volcanic activity
Venus
Largly distributed shield volcanoes
Larger and less explosive volcanoes
Earth
Volcanoes mostly on tectonic boundaries
Similarities between planets
Both rocky planets with simiar surface features
Similar distance from the sun (realtive)
Results
Distribution
Venus has evenly distributed volcanoes
whereas earth's are restricted to plate boundaries
Size
Venus has volcanoes with a larger
average diameter than earth's
VEI
Earth has volcanoes with larger VEIs than venus
Density
Venus has a higher volcano density than earth
Discussion
Because of earth's tectonic boundaries it's
volcanoes are much more geographically organized
The volcanism on Venus was found
to be predominantly flood balsalt
Patterns are similar in that both planets
don't experience volcanism at high altitudes
Venus has volcanoes much larger in diameter
due to their effusive (shield volcano) nature
Conclusion
Uncertianty in this data comes from the fact that many of earth's volcanism in hidden underwater, yet to be explored and therfore not involved in the data
Planets have volcanic similarities in relation to elevation
Types of volcanism
Venus
Shield volcanoes due to floods basalts
Higher volcanic density
Earth
More explosive volcanoes due to subduction zones
Higher VEI ratings