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Updated: Jan 26, 2026
07:58
Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
Published on: August 7, 2017
9.9K
Magma chambers: what we can, and cannot, learn from volcano geodesy.
1Geophysics Department , Stanford University , Stanford, CA 94305-2215 , USA.
Summary
Volcanic geodesy reveals magma chamber depth and shape by analyzing ground deformation. Incorporating viscoelasticity and complex magma properties explains observed inflation cycles and post-eruption inflation.
Area of Science:
- Geophysics
- Volcanology
- Earth Sciences
Background:
- Geodetic observations provide insights into crustal magma chambers.
- Deformation patterns relate to chamber depth, volume, and shape.
- Simple elastic models are insufficient for complex volcanic systems.
Purpose of the Study:
- To explore how viscoelasticity and complex magma properties influence volcanic deformation.
- To explain observed inflation cycles and post-eruption inflation.
- To discuss challenges and future directions in volcano geodesy.
Main Methods:
- Analysis of geodetic deformation data (horizontal and vertical displacement).
- Modeling of elastic and viscoelastic responses of magma chambers.
- Numerical calculations for ellipsoidal chambers with viscoelastic aureoles.
Main Results:
- Deformation decay rate indicates chamber depth; amplitude relates to pressure-volume product.
- Chamber shape influences horizontal vs. vertical displacement ratios.
- Viscoelastic models explain post-eruptive inflation and complex inflation cycles.
Conclusions:
- Viscoelasticity significantly alters time-dependent deformation response.
- Complex magma properties (non-Newtonian) and crustal behavior are crucial for accurate modeling.
- Advanced geodetic and modeling approaches are needed for volcano monitoring.
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