IAVCEI 2013 Session 2-6d. Understanding sudden effusive-explosive
transitions
From: Kimberly Genareau <kig210@xxxxxxxxxx <K.Nemeth@xxxxxxxxxxxx>
*************************************************************************************
Dear Colleagues,
We would like to draw your attention to the following session for the IAVCEI
2013 Kagoshima meeting.
2-6d. Understanding sudden effusive-explosive transitions
Eruptive activity at persistently active stratovolcanoes is typically
characterized by repeated lava dome growth and collapse with intermittent
explosions. The generation of pyroclastic density currents from collapse of
both lava domes and eruptive columns poses significant hazards for
surrounding communities, as demonstrated by eruptions of Merapi Volcano
(Indonesia), Soufriere Hills (Montserrat), Mt. Unzen (Japan), Mount St.
Helens (U.S.A.), and other active stratovolcanoes throughout the world.
There is often a complex interplay of either slow or rapid dome growth,
dome collapse (which may decompress underlying magma), and explosions of
various intensities occurring within a series. Resulting density currents
may reach several kilometers from the existing edifice, either confined to
existing channels or developing low-density surges that are able to
surmount existing topographic highs. Ash from these events may also have
far-reaching consequences and pose significant aviation hazards.
In order to mitigate the pyroclastic hazards associated with persistently
active stratovolcanoes, it is vital to understand the dynamics that cause
transitions between explosive and effusive activity, including variations
in magma ascent rates, changes in magma rheology during ascent through the
volcanic conduit, vesiculation, crystallization, and fragmentation. This
session invites contributions that explore the parameters that cause
eruptive activity to transition from one style to another, particularly
studies that use a combination of field-based and analytical methods to
directly quantify magmatic properties, and temporal variations in those
properties throughout the course of an eruption that affect the resulting
physical dynamics of pyroclastic density currents.
Kimberly Genareau <kig210@xxxxxxxxxx>,
Gert Lube <g.lube@xxxxxxxxxxxx>,
Shane J. Cronin <s.j.Cronin@xxxxxxxxxxxx>,
Michael Turner <micheal.turner@xxxxxxxxx>
--
Kimberly Genareau, Ph.D.
Lehigh University
Earth & Environmental Sciences
1 West Packer Avenue
Bethlehem, PA 18015
(484) 895-9343
==============================================================
transitions
From: Kimberly Genareau <kig210@xxxxxxxxxx <K.Nemeth@xxxxxxxxxxxx>
*************************************************************************************
Dear Colleagues,
We would like to draw your attention to the following session for the IAVCEI
2013 Kagoshima meeting.
2-6d. Understanding sudden effusive-explosive transitions
Eruptive activity at persistently active stratovolcanoes is typically
characterized by repeated lava dome growth and collapse with intermittent
explosions. The generation of pyroclastic density currents from collapse of
both lava domes and eruptive columns poses significant hazards for
surrounding communities, as demonstrated by eruptions of Merapi Volcano
(Indonesia), Soufriere Hills (Montserrat), Mt. Unzen (Japan), Mount St.
Helens (U.S.A.), and other active stratovolcanoes throughout the world.
There is often a complex interplay of either slow or rapid dome growth,
dome collapse (which may decompress underlying magma), and explosions of
various intensities occurring within a series. Resulting density currents
may reach several kilometers from the existing edifice, either confined to
existing channels or developing low-density surges that are able to
surmount existing topographic highs. Ash from these events may also have
far-reaching consequences and pose significant aviation hazards.
In order to mitigate the pyroclastic hazards associated with persistently
active stratovolcanoes, it is vital to understand the dynamics that cause
transitions between explosive and effusive activity, including variations
in magma ascent rates, changes in magma rheology during ascent through the
volcanic conduit, vesiculation, crystallization, and fragmentation. This
session invites contributions that explore the parameters that cause
eruptive activity to transition from one style to another, particularly
studies that use a combination of field-based and analytical methods to
directly quantify magmatic properties, and temporal variations in those
properties throughout the course of an eruption that affect the resulting
physical dynamics of pyroclastic density currents.
Kimberly Genareau <kig210@xxxxxxxxxx>,
Gert Lube <g.lube@xxxxxxxxxxxx>,
Shane J. Cronin <s.j.Cronin@xxxxxxxxxxxx>,
Michael Turner <micheal.turner@xxxxxxxxx>
--
Kimberly Genareau, Ph.D.
Lehigh University
Earth & Environmental Sciences
1 West Packer Avenue
Bethlehem, PA 18015
(484) 895-9343
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