Development & Methods

One focus of our research is the development of new seismic methods to image the subsurface including methods for integrated interpretation. Currently, we are working on the following topics: Lithological classification, imaging of vertical structures, migration and array methods, localizing non-volcanic tremor, analysis of ambient noise and surface waves.

Lithological classification; integrated interpretation

Primarily, geophysical measurements yield physical parameters such as the seismic velocity or the electrical resistivity. However, for the geological interpretation the knowledge about type and composition of the rocks and their state is essential. We work on automated methods for lithological classification utilizing tomographic results and neural networks (among others).

Projects: I-GET, ANCORP, DESERT, SIPOSEIS
Publications
: Bauer et al., 2008, 2012a,
Jousset et al., 2011, Maercklin et al., 2005,  Haberland et al., 2003,
Ryberg et al., 2012, Weber et al., 2012, Stankiewicz et al., 2011, Muksin et al., 2013

Seismic imaging of near-vertical structures

The strength of reflection seismic methods is the imaging of sub-horizontal structures. We are working on improved methods to image sub-vertical structures such as faults utilizing innovative acquisition geometries, migration and tomography.

Projects: San Andreas Fault, DESERT, SSIP (Salton Seismic Imaging Project)
Publications
: Bauer et al., 2013b, Maercklin et al., 2004

Localization of non-volcanic tremor

Seismic tremor, known for a long time from volcanoes, has recently also been discovered in the deeper parts of subduction zones (in 2002) and at shear zones (San Andreas fault; in 2005). So far, this exotic type of natural seismic source is only poorly understood. We work on array methods to localize the tremor sources which could also be used for automatic detection algorithms.

Projects: San Andreas Fault
Publications: Ryberg et al., 2010, Shelly et al., 2009

Analysis of ambient seismic noise

The analysis of ambient seismic noise became very popular in the last years. These economic methods yield structural models of the sub-surface at very different scales which are often complementary to the models obtained by controlled source seismics or earthquake seismology.

Projects: Lake Toba, INKABA, DESERT
Publications: Stankiewicz et al., 2010, 2012, Ryberg 2011,