2012
DOI: 10.1016/j.jvolgeores.2012.06.009
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Catastrophic caldera-forming eruptions: Thermomechanics and implications for eruption triggering and maximum caldera dimensions on Earth

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Cited by 178 publications
(217 citation statements)
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“…Such overpressures can be sufficient to trigger an eruption, as the roof of the shallow magma chamber can undergo to intensive heating that can significantly weaken the strength of the overlying rocks (Gregg et al, 2012(Gregg et al, , 2015. Another end-member for triggering the eruption could be when a fracture opens from surface or all through the host rock above the magma chamber if there is a pre-existing fault.…”
Section: Control Of Local Stress Field On Eruption Dynamics and Intenmentioning
confidence: 99%
“…Such overpressures can be sufficient to trigger an eruption, as the roof of the shallow magma chamber can undergo to intensive heating that can significantly weaken the strength of the overlying rocks (Gregg et al, 2012(Gregg et al, , 2015. Another end-member for triggering the eruption could be when a fracture opens from surface or all through the host rock above the magma chamber if there is a pre-existing fault.…”
Section: Control Of Local Stress Field On Eruption Dynamics and Intenmentioning
confidence: 99%
“…Taking advantage of previous advances in thermomechanical modeling of calderas (Gregg et al, 2012(Gregg et al, , 2013, we utilize COMSOL Multiphysics 4.4 in combination with MATLAB 2014b to develop and implement a temperature-dependent, viscoelastic FEM for a resurgent caldera (Figures 7, 8). COMSOL is utilized for mesh development (including adaptive meshing), and solving for stress, strain, and displacement in response to applied loads in a linear viscoelastic solid using a Maxwell-Weichert formulation.…”
Section: Modeling Resurgence At Tobamentioning
confidence: 99%
“…Uplift due to magma chamber growth is also highly dependent on crustal rheology (Del Negro et al, 2009;Gregg et al, 2012Gregg et al, , 2013. We investigate two end-member cases for the crustal rheology: constant viscosity and temperature-dependent viscosity.…”
Section: Modeling Resurgence At Tobamentioning
confidence: 99%
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“…The frequency of eruptions of M < 4 is potentially influenced by additional processes such as second boiling (Tait et al, 1989), and hence smaller eruptions may not satisfy the exchangeability assumption. Similarly, we restrict the upper bound of the data set to M7, as the processes triggering larger eruptions could differ from those responsible for eruptions of lower magnitude (Deligne et al, 2010;Gregg et al, 2012;Caricchi et al, 2014). To further satisfy the assumption of exchangeability and common geo-tectonic processes, we restrict the analysis to arc volcanoes.…”
Section: Datamentioning
confidence: 99%