Book contents
- Glacially-Triggered Faulting
- Glacially-Triggered Faulting
- Copyright page
- Contents
- Figures
- Tables
- Contributors
- Preface
- Part IIntroduction
- Part IIMethods and Techniques for Fault Identification and Dating
- Part IIIGlacially Triggered Faulting in the Fennoscandian Shield
- Part IVGlacially Triggered Faulting at the Edge and in the Periphery of the Fennoscandian Shield
- Part VGlacially Triggered Faulting Outside Europe
- Part VIModelling of Glacially Induced Faults and Stress
- 22Glacial Isostatic Adjustment Models for Earthquake Triggering
- 23Crustal-Scale Stress Modelling to Investigate Glacially Triggered Faulting
- Part VIIOutlook
- Index
- References
22 - Glacial Isostatic Adjustment Models for Earthquake Triggering
from Part VI - Modelling of Glacially Induced Faults and Stress
Published online by Cambridge University Press: 02 December 2021
Book contents
- Glacially-Triggered Faulting
- Glacially-Triggered Faulting
- Copyright page
- Contents
- Figures
- Tables
- Contributors
- Preface
- Part IIntroduction
- Part IIMethods and Techniques for Fault Identification and Dating
- Part IIIGlacially Triggered Faulting in the Fennoscandian Shield
- Part IVGlacially Triggered Faulting at the Edge and in the Periphery of the Fennoscandian Shield
- Part VGlacially Triggered Faulting Outside Europe
- Part VIModelling of Glacially Induced Faults and Stress
- 22Glacial Isostatic Adjustment Models for Earthquake Triggering
- 23Crustal-Scale Stress Modelling to Investigate Glacially Triggered Faulting
- Part VIIOutlook
- Index
- References
Summary
To model glacial triggering of earthquakes, it is necessary to obtain the spatio-temporal variation of glacial isostatic adjustment-induced stress during a glacial cycled. This can be computed efficiently using commercial Finite Element codes with appropriate modifications to include the important effects of ‘pre-stress advection’, ‘internal buoyancy’ and ‘self-gravity’. The modifications described in Wu (2004) are reviewed for incompressible and so-called materially compressible flat-earths. When the glacial isostatic adjustment-induced stress is superimposed on the background tectonic stress and overburden pressure, the time variation of earthquake potential at various locations in the Earth can be evaluated for any fault orientation. To model more complex slip and fault behavior over time, the three-stage Finite Element model approach of Steffen et al. (2014) is reviewed. Finally, selected numerical examples and their results from both modelling approaches are shown.
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- Glacially-Triggered Faulting , pp. 383 - 401Publisher: Cambridge University PressPrint publication year: 2021
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