Subject: Eruption Explosivity

Volcanic eruptions are more violent at converging boundaries than at divergent boundaries. Why is this so, or is it?

   Convergent plate margin eruptions are more violent because the magma is more viscous from lower temperatures and it has more volatiles (mostly water).

Dr. Mike Garcia, Professor
Hawaii Institute of Geophysics and Planetology
University of Hawaii, Honolulu HI 96822

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