5 comments on “Mount Unzen Dome Complex

  1. Hi all! An highly interesting paper has come out about the emplacement of an almost 1km³ laccolith (a domed sill) in very shallow depth below Cordón Caulle in Chile after the onset of its 2011 eruption when there was an uplift of ~200m measured on the volcano. The accumulation of magma might have been caused by a considerable decrease of the conduit diameter (8-fold!) before or during eruption, allowing the rising pressurised magma to intrude sideways under the surface. “Jon (Castro)’s findings challenge existing understanding of magma movement within volcanoes, and reveal an unforeseen hazard associated with explosive eruptions.
    This is the backstory on Hugh Tuffen’s fb page on how they found out about the intrusion and their expeditions to C. Caulle:
    FB: https://www.facebook.com/DrHughTuffen/posts/751515471668616
    And a link to the paper: http://www.nature.com/articles/ncomms13585


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