GEOPHYS 288A: Crustal Deformation
Earthquake and volcanic deformation, emphasizing analytical models that can be compared to data from GPS, InSAR, and strain meters. Deformation, stress, and conservation laws. Dislocation models of strike slip and dip slip faults, in 2 and 3 dimensions. Crack models, including boundary element methods. Dislocations in layered and elastically heterogeneous earth models. Models of volcano deformation, including sills, dikes, and magma chambers. Offered every other year, autumn quarter.
Terms: Aut
| Units: 3-5
Instructors:
Segall, P. (PI)
;
Bruhat, L. (TA)
GEOPHYS 288B: Crustal Deformation
Earthquake and volcanic deformation, emphasizing analytical models that can be compared to data from GPS, InSAR, and strain meters. Viscoelasticity, post-seismic rebound, and viscoelastic magma chambers. Effects of surface topography and earth curvature on surface deformation. Gravity changes induced by deformation and elastogravitational coupling. Poro-elasticity, coupled fluid flow and deformation. Earthquake nucleation and rate-state friction. Models of earthquake cycle at plate boundaries.
Terms: Win
| Units: 3-5
Instructors:
Segall, P. (PI)
;
Maurer, J. (TA)
GEOPHYS 289: Global Positioning System in Earth Sciences
The basics of GPS, emphasizing monitoring crustal deformation with a precision of millimeters over baselines tens to thousands of kilometers long. Applications: mapping with GIS systems, airborne gravity and magnetic surveys, marine seismic and geophysical studies, mapping atmospheric temperature and water content, measuring contemporary plate motions, and deformation associated with active faulting and volcanism.
Last offered: Spring 2014
GEOPHYS 290: Tectonophysics (GEOPHYS 186)
The physics of faulting and plate tectonics. Topics: plate driving forces, lithospheric rheology, crustal faulting, and the state of stress in the lithosphere. Exercises: lithospheric temperature and strength profiles, calculation of seismic strain from summation of earthquake moment tensors, slip on faults in 3D, and stress triggering and inversion of stress from earthquake focal mechanisms. Offered every other year, winter quarter.
GEOPHYS 292: Magnetotellurics: Introduction, practical data analysis and inversion
Geophys 292 approved, also can meet PhD requirement for 4 200-level classesnGEOPHYS 292 Magnetotellurics: introduction, practical data analysis and inversion. Designed for those with no knowledge of magnetotellurics or electromagnetic induction methods, this class will cover the theory and practice of the MT method with application to both commercial (mineral, oil/gas, and geothermal exploration) and academic (crustal and lithospheric studies). The second half of the class is a hands-on analysis and modelling workshop that will require use of a laptop and instructor-provided codes and data. The analysis will be using various methods to determine dimensionality and directionality, and testing the apparent resistivities and phases for internal consistency. The modelling will be 1D only, but knowledge and skills gained from understanding 1D inversion are equally applicable to 2D and 3D.nTextbook is ¿The Magnetotelluric Method: Theory and Practice¿ (Chave and Jones, CUP, 2012).
Terms: Win
| Units: 3
Instructors:
Klemperer, S. (PI)
;
Menzel-Jones, A. (PI)
GEOPHYS 293: Seismic imaging using earthquake and ambient-noise data
Seismic imaging using earthquake and ambient noise data has developed into one of the most powerful tools to study the Earth's internal structure from regional to global scales. This class will give a (slightly futuristic) account of this topic.n In the first part we will focus on regional- to global-scale full-waveform inversion (FWI) using earthquake data. We will review the theoretical foundations of visco-elastic FWI, discuss data requirements, study modern techniques to quantify resolution using second-order adjoints and random probing techniques, and finally highlight some recent applications.In the second part of this class, we will extend the earthquake-based inversions to inversions using the ambient seismic noise field. We will develop interferometric techniques that do not require the traditional assumption of an equipartitioned wavefield, and that allow us to jointly invert for Earth structure and the sources of seismic noise. Furthermore, we will analyze how common noise processing techniques lead to an effective, i.e. distorted, view of Earth structure and noise sources. In the third part we will study how the first and second part maybe combined into a new class of techniques where earthquake and ambient noise data are inverted jointly, instead of following traditional approaches where one is removed from the other.This class will be complemented by small programming examples in order to illustrate basic concepts. Since we will mostly cover ongoing research, this class is also intended to provoke discussions and collaborations.
Terms: Spr
| Units: 1
Instructors:
Fichtner, A. (PI)
GEOPHYS 385A: Reflection Seismology
Research in reflection seismology and petroleum prospecting. May be repeated for credit.
Terms: Aut, Win, Spr, Sum
| Units: 1-2
| Repeatable
for credit
Instructors:
Biondi, B. (PI)
;
Clapp, R. (PI)
GEOPHYS 385B: Environmental Geophysics
Research on the use of geophysical methods for near-surface environmental problems. May be repeated for credit.
Terms: Aut, Win, Spr, Sum
| Units: 1-2
| Repeatable
for credit
Instructors:
Knight, R. (PI)
GEOPHYS 385D: Theoretical Geophysics
Research on physics and mechanics of earthquakes, volcanoes, ice sheets, and nglaciers. Emphasis is on developing theoretical understanding of processes governing natural phenomena.
Terms: Aut, Win, Spr, Sum
| Units: 1
| Repeatable
for credit
Instructors:
Dunham, E. (PI)
GEOPHYS 385E: Tectonics
Research on the origin, major structures, and tectonic processes of the Earth's crust. Emphasis is on use of deep seismic reflection and refraction data. May be repeated for credit.
Terms: Aut, Win, Spr, Sum
| Units: 1-2
| Repeatable
for credit
Instructors:
Klemperer, S. (PI)
;
Sleep, N. (PI)
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