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CV. Curriculum Vitae. Stephan Husen. Born July 13, 1967 in Kiel, Germany. Local Earthquake Tomography. Ph.D. Thesis (1999). Local earthquake tomography of a convergent margin, North Chile received at GEOMAR, Kiel. Earthquake Location. Scientific Record.

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CV

Curriculum Vitae

Stephan Husen

Born July 13, 1967 in Kiel, Germany

Local Earthquake Tomography

Ph.D. Thesis (1999)

Local earthquake tomography of a convergent margin, North Chile

received at GEOMAR, Kiel

Earthquake

Location

Scientific Record

since Jan. 2004 MAGE Postdoc at ETH Zurich, Switzerland

Future Work

2001 - 2003 Postdoc at University of Utah, U.S.A.

1999 - 2001 Postdoc at ETH Zurich, Switzerland


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LET - Development (FATOMO)

Curriculum Vitae

FATOMO

Local earthquake tomography between rays and waves: Fat ray tomography

Local Earthquake Tomography

use of fat ray instead of rays in seismic tomography

Development: FATOMO

Earthquake

Location

Future Work


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LET - Development (FATOMO)

Curriculum Vitae

FATOMO

Local earthquake tomography between rays and waves: Fat ray tomography

Local Earthquake Tomography

tsx+ trx - tsr = dt = T/2

Development:FATOMO

Earthquake

Location

Source travel time field

Receiver travel time field

Fat ray approximating Fresnel Volume

Future Work


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LET - Development (MODEL PARA)

Curriculum Vitae

Three-Grid Approach

Local Earthquake Tomography

Numerical grid:

Specifically designed for forward solution

Development:Model Parameterization

Seismic grid:

Resembling Earth structure incorporating a priori information

Earthquake

Location

Future Work

Inversion grid:Specifically designed for optimal sampling of model parameters


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LET - Application (Chile)

Curriculum Vitae

Subduction Zone North Chile

Local Earthquake Tomography

Application:

Subduction Zone

Earthquake

Location

Study structure and processes of the shallow portion of a subduction zone

Future Work


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LET - Application (Chile)

Curriculum Vitae

Subduction Zone North Chile

Three-dimensional P-wave structure

Local Earthquake Tomography

Application:

Subduction Zone

Earthquake

Location

Future Work

Three-dimensional P- to S-wave ratio (Vp/Vs) structure


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LET - Application (Chile)

Curriculum Vitae

Subduction Zone North Chile

Vp/VS ratio

Solution quality

Local Earthquake Tomography

a) early

Application:

Subduction Zone

Earthquake

Location

b) late

Future Work

Time-dependent inversion to image transient process of post-seismic fluid migration


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LET - Application (Yellowstone)

Curriculum Vitae

Yellowstone Volcanic Field

Local Earthquake Tomography

Application:

Volcanic region

Earthquake

Location

Future Work

Study structure and processes of a large volcanic system


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LET - Application (Yellowstone)

Curriculum Vitae

Yellowstone Volcanic Field

P-wave velocity

P- to S-wave ratio

Local Earthquake Tomography

Application:

Volcanic region

Earthquake

Location

Future Work


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LET - Application (Yellowstone)

Curriculum Vitae

Yellowstone Volcanic Field

Local Earthquake Tomography

Application:

Volcanic region

gas body

crystallizing magma

Earthquake

Location

1985 swarm

fluid

Future Work

Release of fluids generated by magma crystallization


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EQ Location (PDF)

Curriculum Vitae

Posteriori Probability Density Function (PDF)

Grid-search

Oct-Tree importance sampling

Local Earthquake Tomography

Earthquake

Location

non-linear, probabilistic earthquake location

Future Work

confidence contours

scatter clouds

maximum likelihood hypocenter location

68% confidence ellipsoid


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EQ Location (example)

Curriculum Vitae

Posteriori Probability Density Function (PDF)

1987 05 08 09:59 46.146 N 8.614 E 4.1km

Local Earthquake Tomography

Nobs: 8

RMS: 0.04 s

GAP: 193

Dmin: 1.9 km

Earthquake

Location

non-linear, probabilistic earthquake location

Future Work

Non-linear(3D)

Linear(1D)


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Future Work

Curriculum Vitae

Relation to MAGE network

  • my work is related to task 7 compilation of existing geophysical methods to invert data provided by the Netlander mission

Local Earthquake Tomography

  • further development on existing geophysical methods for Earth studies

Earthquake

Location

  • application and tuning of existing geophysical methods to planetary data sets (real and synthetic) considering their peculiarities, i.e. small number of receivers

Future Work


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