Felix Waldhauser - Lamont Research Professor
Lamont-Doherty Earth Observatory, Columbia University, P.O. Box 1000, Palisades, NY 10964 USA
Ph. 845.365.8538, Fax. 845.365.8150, felixw@ldeo.columbia.edu, http://www.ldeo.columbia.edu/~felixw
Research Interests:
My research is focused on the nature of seismogenic processes along major plate boundary systems. I develop high-precision earthquake location algorithms for large-scale application to study the structure of active faults, the spatio-temporal characteristics of seismicity, and the physical processes underlying seismic failure. I am also working on operational real-time procedures that enable high-resolution monitoring of changes in seismic signals and fault properties over time periods of seconds to decades. This is relevant to the immediate evaluation and mitigation of seismic hazards, the potential for forecasting future events, and for effective monitoring of compliance with the Comprehensive Nuclear-Test-Ban Treaty.
Recent and Current Research:
Global-scale seismicity analysis
Novel data processing and analysis methods are applied to vast seismic archives to study high-resolution subdcution zone structure and kinematics on a global scale. 		Seismic monitoring on the East Pacific Rise at 9°50'N
This project studies magmatic and hydrothermal processes using seismic data collected by ocean bottom seismometers (OBSs) over a 3-year period.
Real-time double-difference analysis in Northern California
New methods compute high-precision hypocenter locations for Northern CA in near-real-time. 		Double-difference earthquake catalog for Northern California
This project computes and maintains a high-precison cross-correlation based earthquake catalog for Northern California.
Past Research:

Crustal and upper mantle structure

Nuclear Test-Ban-Treaty Research

Software and Resources:
Software package for double-difference earthquake location.
Double-difference catalogs
Selected Publications (full publications list ):

Waldhauser, F., D.P. Schaff, T. Diehl, and E.R. Engdahl, Splay faults imaged by fluid-driven aftershocks of the 2004 Mw 9.2 Sumatra-Andaman earthquake, Geology, v. 40/3, p. 243-246, doi:10.1130/G32420.1, 2012. [PDF]

Waldhauser, F. and M. Tolstoy, Seismogenic structure and processes associated with magma inflation and hydrothermal circulation beneath the East Pacific Rise at 9°50'N, Geochem. Geophys. Geosyst., 12, Q08T10, doi:10.1029/2011GC003568, 2011. [PDF]

Schaff, D.P. and F. Waldhauser, One magnitude unit reduction in detection threshold by cross correlation applied to Parkfield (California) and China seismicity, Bull. Seism. Soc. Am., 100, 3224-3238, doi:10.1785/0120100042, 2010. [PDF]

Waldhauser, F., Near-real-time double-difference event location using long-term seismic archives, with application to Northern California, Bull. Seism. Soc. Am., 99, 2736-2848, doi:10.1785/0120080294, 2009. [PDF]

Tolstoy, M., F. Waldhauser, D.R. Bohnenstiehl, R.T. Weekly, and W.-Y. Kim, Seismic identification of along-axis hydrothermal flow on the East Pacific Rise, Nature, 451, 1920-1922, doi:10.1038/nature06424, 2008. [PDF]

Bakun, W.H., B. Aagaard, B. Dost, W.L. Ellsworth, J.L. Hardebeck, R.A. Harris, C. Ji, M.J.S. Johnston, J. Langbein, J.J. Lienkaemper, A.J. Michael, J.R. Murray, R.M. Nadeau, M.S. Reichle, P.A. Reasenberg, E.A. Roeloffs, A. Shakal, R.W. Simpson, and F. Waldhauser, The 2004 Parkfield (CA) Earthquake: Implications for Prediction and Hazard Assessment, Nature, 437, 969-974, 2005. [PDF]

Rietbrock, A. and F. Waldhauser, A narrowly spaced double-seismic zone in the subducting Nazca plate, Geophys. Res. Lett., 31, L10608, doi:10.1029/2004GL019610, 2004. [PDF]

Waldhauser F. and W.L. Ellsworth, A double-difference earthquake location algorithm: Method and application to the northern Hayward fault, Bull. Seism. Soc. Am., 90, 1353-1368, 2000. [PDF]

Waldhauser, F., E. Kissling, J. Ansorge, and St. Mueller, Three-dimensional interface modelling with two-dimensional seismic data: The Alpine crust-mantle boundary, Geophys. J. Int. , 135, 264-278, 1998. [PDF]