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UID:20260709T050855EDT-54782XPTIW@132.216.98.100
DTSTAMP:20260709T090855Z
DESCRIPTION:The nature and origin of large explosive\neruptions\nBy John\nS
 tix (Dept. Earth and Planetary Sciences\, ºÚÁÏÍø±¬³Ô¹Ï\nUniversity)\nThis lectur
 e addresses the nature and causes of episodic\neruptions which can cause l
 ocal\, regional\, and global devastation.\nA key parameter is the presence
  of large volumes of magma\, stored\nat 5-10 km depth in a crustal magma r
 eservoir\, which are capable of\nbeing erupted. If a reservoir is sufficie
 ntly drained of its magma\nduring eruption\, the roof of the reservoir wil
 l fail\, creating a\nlarge depression on the surface called a caldera. Whe
 ther a caldera\nforms early or late during the course of an eruption will 
 influence\nthe style of the eruption. Another key parameter is the trigger
 \nwhich initiates the eruption. Potential trigger mechanisms include\neart
 hquakes and injections of magma from deeper levels in the crust\nor mantle
 . Understanding the types of precursory activity which\nlead to a large er
 uption is a current challenge in volcanology\, as\nwe have never experienc
 ed such an event in historic time.\nNevertheless\, we may draw on clues fr
 om smaller events to provide\nus with insight. The lectures will conclude 
 with a discussion of\nthe probable consequences of such eruptions upon our
  society. Read\nDr. Stix Globe & Mail article about \nwhat Icland's volcan
 o in 2010 meant to the world.\nIMAGE: The volcano in southern Iceland's Ey
 jafjallajokull\nglacier spewing ash and grit into the air\, April 2010. Fr
 om\nWikimedia Commons.\nBy John\nStix (Earth and Planetary Sciences\, McGi
 ll\nUniversity)\nInitiated in 2003 with the express purpose of fostering\n
 communication between scientists in different disciplines as well\nas betw
 een scientists and the public\, Cutting\nEdge Lectures in Science are made
  possible through\nthe generous support of Faculty of Medical Sciences (Pr
 ofessor\nMarianna Newkirk\, Associate Dean Research)\, Faculty of Arts\n(P
 rofessor Christopher Manfredi\, Dean)\, Faculty of Agricultural and\nEnvir
 onmental Sciences (Professor Chandra Madramootoo\, Dean)\,\nFaculty of Sci
 ence (Professor Martin Grant\, Dean) and the Centre\nfor Applied Mathemati
 cs in Bioscience and Medicine (CAMBAM). For\nmore information\, please cal
 l 514-398-4094.\n\n\n
DTSTART:20120412T220000Z
DTEND:20120413T003000Z
LOCATION:Redpath Museum\, CA\, QC\, Montreal\, H3A 0C4\, 859 rue Sherbrooke
  Ouest
SUMMARY:Cutting Edge Lectures in Science: The nature and origin of large ex
 plosive eruptions
URL:/channels/event/cutting-edge-lectures-science-natu
 re-and-origin-large-explosive-eruptions-212923
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