Geophysics

The Geophysics faculty are concerned with the broad range of physical processes affecting the solid Earth, from the core, mantle, and crust to the cryosphere, and carry out related studies of Mercury, Mars, and Earth's moon. We focus on understanding plate-tectonic processes in marine and terrestrial settings, determining the structure of the Earth's interior, and understanding earthquake and volcano dynamics. We study mechanisms for ice, magma, and sediment transport and for the exchange of mass between the solid Earth and its fluid envelope, and we work to understand interactions of large-scale surface deformation with the oceans and atmosphere. We are also concerned with the quantitative study of natural hazards and associated risks, hydrocarbon exploration and extraction, and explosion and earthquake monitoring for the verification of nuclear test-ban treaties. Our research draws on a variety of approaches, including seismology; geodesy; remote sensing; volcanology; physical glaciology; rock mechanics; and geophysical fluid dynamics. We emphasize the integration of data-analysis and modeling approaches, and many faculty maintain active field programs and engage in the development of geophysical instrumentation. The Geophysics faculty contribute expertise to inform decision-making at the local, national and international levels.

Geophysics Courses
 

 

             

 

                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 

Natalie Accardo
Personal Information
Natalie
Accardo
Graduate Student
Earth and Environmental Sciences
Seismology Geology and Tectonophysics
Contact Information
201E Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(502) 291-0280

Fax: 

(845) 365-8150
Sean C. Solomon
Personal Information
Sean
C.
Solomon
Director
Lamont-Doherty Earth Observatory
Associate Director for Earth Systems Science
Earth Institute
William B. Ransford Professor of Earth and Planetary Science
Columbia University
Contact Information
214 Monell
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8714

Fax: 

(845) 365-8162
Michael Howe
Personal Information
Michael
Howe
Graduate Research Fellow
Earth and Environmental Sciences
Seismology Geology and Tectonophysics
Contact Information
howe.jpg
201A Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(269) 547-0614

Fax: 

(845) 365-8150
Alberto Malinverno
Personal Information
Alberto
Malinverno
Lamont Research Professor
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Marine Geology and Geophysics
Lecturer
Earth and Environmental Sciences
Contact Information
304A Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8577

Fax: 

(845) 365-8156
David Schaff
Personal Information
David
Schaff
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Seismology Geology and Tectonophysics
Contact Information
230B Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8826

Fax: 

(845) 365-8150

My research has involved applying massive waveform cross correlation to earthquake location, earthquake detection, repeating events, measuring temporal changes in the crust associated with large earthquakes, testing competing models of foreshock occurrence, studying the earthquake source using empirical Green’s functions, and nuclear monitoring.

Heather Savage
Personal Information
Heather
Savage
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Seismology Geology and Tectonophysics
Contact Information
226 Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8720

Fax: 

(845) 365-8150
Education
PhD
Penn State University
2007
MS
University of Massachusetts
2002
BA
Colgate University
1998
Ben Holtzman
Personal Information
Ben
Holtzman
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Seismology Geology and Tectonophysics
Lecturer
Earth and Environmental Sciences
Contact Information
220 Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8382

Fax: 

(845) 365-8150

Fields of interest: 

The intersection of rock physics, seismology, and geodynamics
Education
Ph.D. Geophysics
University of Minnesota
2003
M.Sc. Geology
University of Minnesota
1999
Sc. B. Geological Sciences
Brown University
1995
Selected Publications:
Viscous energy dissipation and strain partitioning in partially molten rocks, Holtzman, B. K.; Kohlstedt, D. L.; Morgan, J. P. Journal of Petrology Dec, Volume: 46, Issue: 12 p.: 2569-2592 (2005) DOI 10.1093/petrology/egi065
Vug-waves: a non-dilatent shear-driven melt migration mechanism, Morgan, J. P.; Holtzman, B. K. Geophysics, Geochemistry, Geosystems (2005)
Stress-driven melt segregation in partially molten rocks, Holtzman, B. K.; Groebner, N. J.; Zimmerman, M. E.; Ginsberg, S. B.; Kohlstedt, D. L. Geochemistry Geophysics Geosystems May 9, Volume: 4 p.: - (2003) Doi 10.1029/2001gc000258
Melt segregation and strain partitioning: Implications for seismic anisotropy and mantle flow, Holtzman, B. K.; Kohlstedt, D. L.; Zimmerman, M. E.; Heidelbach, F.; Hiraga, T.; Hustoft, J. Science Aug 29, Volume: 301, Issue: 5637 p.: 1227-1230 (2003)
Gauging Stress from deformed chromite pods in the Oman ophiolite, Holtzman, B. K. Geological Society of America Special Paper, Volume: 80 p.: 149-160 (2001)
Timothy Crone
Personal Information
Timothy
Crone
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Contact Information
303D Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8687

Fax: 

(845) 365-8156

I am a marine geophysicist interested in the interplay between relatively large-scale geophysical processes and the microbial biosphere.I am currently studying the tidal modulation of aqueous fluid flow within mid-ocean ridge hydrothermal systems, with the hope of understanding how such flow variations can affect subseafloor primary production. I also study spatial variations in the tidal triggering of microearthquakes within ridge systems, and I study problems in acoustics associated with high-temperature hydrothermal vents and seafloor seismic networks.

Ultimately my work has implications for theories about the origins and evolution of life on this planet, and for theories regarding life elsewhere in the universe. I use numerical models to investigate these processes, and I develop new observational techniques and seafloor instrumentation to verify model predictions.

Education
Ph.D. Oceanography
University of Washington
2007
M.S. Oceanography
University of Washington
2004
B.S. Oceanography
University of Washington
1999
Selected Publications:
Mantle helium reveals Southern Ocean hydrothermal venting, Winckler, G.; Newton, R.; Schlosser, P.;Crone, T Geophysical Research Letters (2010) 10.1029/2009GL042093
Flow rate perturbations in a black smoker hydrothermal vent in response to a mid-ocean ridge earthquake swarm, Crone, T J; Wilcock, W S D; McDuff, R E Geochemistry, Geophysics, Geosystems, Volume: 11 p.: Q03012 (2010)
Broadband calibration of the R/V Marcus G. Langseth four-string seismic sources, Tolstoy, M.; Diebold, J; Doermann, L.; Nooner, S.; Webb, S.C.; Bohnenstiehl,D.R.; Crone, T.J.; Holmes,z t.C. Geochem. Geophys. Geosyst., Volume: 10, Issue: Q08011 (2009) 10.1029/2009GC002451
Systematic along-axis tidal triggering of microearthquakes observed at 9-50'N East Pacific Rise, Stroup, D F; Tolstoy, M; Crone, T J; Malinverno, A; Bohnenstiehl, D R; Waldhauser, F Geophys Res Lett, Volume: 36, Issue: L18302 (2009)
Broadband calibration of the R/V four‐string seismic source, Tolstoy, M; Diebold, J; Doermann, L; Nooner, S; Webb, S C; Bohnenstiehl, D R; Crone, T J; Holmes, R C Geochem Geophys Geosys, Volume: 10, Issue: 8 p.: doi (2009)
Optical plume velocimetry: a new flow measurement technique for use in seafloor hydrothermal systems, Crone, T. J.; McDuff, R. E.; Wilcock, W. S. D. Experiments in Fluids Nov, Volume: 45, Issue: 5 p.: 899-915 (2008) DOI 10.1007/s00348-008-0508-2
Helene Carton
Personal Information
Helene
Carton
Adjunct Associate Research Scientist
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Contact Information

Fields of interest: 

Mid-ocean ridges, oceanic crust, subduction zones, transform boundaries, multi-channel and wide-angle seismics

I am a marine geophysicist specialized in active source (reflection and refraction) seismic imaging. My research interests include mid-ocean ridge processes, the structure and evolution of oceanic crust and uppermost mantle, subduction zone processes and submarine strike-slip fault systems. I am also interested in airgun source modeling and underwater sound propagation.

Current projects:

  • Study of the structure, evolution and hydration of the Juan de Fuca plate along a ridge-to-trench wide-angle reflection-refraction transect (Endeavour segment to Washington margin) and Cascadia subduction zone structure in Washington
  • 3D multi-channel seismic imaging of the axial magma lens and seismic layer 2A at the East Pacific Rise 9 50'N Ridge 2000 Integrated Study Site
  • Bending-related faulting and subduction of oceanic reliefs at the southern and central Sumatra margin using seismic reflection profiles of the 2009 CGGVeritas survey and multibeam bathymetry
  • Airgun source/ sound propagation modeling for marine mammal mitigation

Cruises since 2007: R/V Langseth 3D seismic shakedown in the Gulf of Mexico (January 2008), 3D MCS cruise MGL0812 at the East Pacific Rise 9 50'N (June-August 2008), CGGVeritas - M/V Wavefield Inseis long-offset survey of the Sumatra subduction zone (May 2009), R/V Langseth JMS inspection (March 2011), Cruise 0C1206A on the Juan de Fuca plate and Cascadia subduction zone (June-July 2012)

Research Blog: http://www.ldeo.columbia.edu/research/blogs/cascadia-in-motion

Education
Ph.D., Geophysics
Institut de Physique du Globe de Paris, France
12/2005
Diploma
Ecole de Physique du Globe de Strasbourg, France
12/2001
DEA (~MSc), Geophysics
Universite Louis Pasteur, Strasbourg, France
06/2001
Selected Publications:
Deep seismic reflection images of the Wharton Basin oceanic crust and uppermost mantle offshore northern Sumatra: Relation with active and past deformation, Carton, H.; Singh, S.C.; Hananto, N.; Martin, J.; Djajadihardja, Y.; Udrekh; Franke, D.; Gaedicke, C. Journal of Geophysical Research (Submitted)
Fine-scale segmentation of the crustal magma reservoir beneath the East Pacific Rise, Carbotte, S.M.; Marjanovic, M.; Carton, H.; Mutter, J.C.; Canales, J.P.; Nedimovic, M.R.; Han, S.; Perfit, M. Nature Geoscience, Volume: 6 p.: 866-870 (2013) doi:10.1038/ngeo1933
Network of off-axis melt bodies at the East Pacific Rise, Canales, J.P.; Carton, H.; Carbotte, S.M.; Mutter, J.; Nedimovic, M.; Xu, M.; Aghaei, O.; Marjanovic, M.; Newman, K. Nature Geoscience, Volume: 5 p.: 279-283 (2012) doi:10.1038/ngeo1377
Aseismic zone and earthquake segmentation associated with a deep subducted seamount, Singh, S.C.; Hananto, N.; Mukti, M.; Robinson, D.; Das, S.; Chauhan, A.; Carton, H.; Gratacos, B.; Midenet, S.; Djajadihardja, Y.; Harjono, H. Nature Geoscience, Volume: 4 p.: 308-311 (2011) doi:10.1038/ngeo1119
Seismic evidence for Neogene and active shortening offshore of Lebanon (Shalimar cruise), Carton, H.; Singh, S. C.; Tapponnier, P.; Elias, A.; Briais, A.; Sursock, A.; Jomaa, R.; King, G. C. P.; Daeron, M.; Jacques, E.; Barrier, L. Journal of Geophysical Research-Solid Earth Jul 24, Volume: 114 p.: - (2009) Doi 10.1029/2007jb005391
Seismic evidence for broken oceanic crust in the 2004 Sumatra earthquake epicentral region, Singh, S. C.; Carton, H.; Tapponnier, P.; Hananto, N. D.; Chauhan, A. P. S.; Hartoyo, D.; Bayly, M.; Moeljopranoto, S.; Bunting, T.; Christie, P.; Lubis, H.; Martin, J. Nature Geoscience Nov, Volume: 1, Issue: 11 p.: 777-781 (2008) Doi 10.1038/Ngeo336
Seismic imaging of the three-dimensional architecture of the Cinarcik Basin along the North Anatolian Fault, Carton, H.; Singh, S. C.; Hirn, A.; Bazin, S.; de Voogd, B.; Vigner, A.; Ricolleau, A.; Cetin, S.; Ocakoglu, N.; Karakoc, F.; Sevilgen, V. Journal of Geophysical Research-Solid Earth Jun 21, Volume: 112, Issue: B6 p.: - (2007) Doi 10.1029/2006jb004548
Thrusting offshore Mt Lebanon: source of the tsunamigenic, 551 AD Beyrut-Tripoli earthquake, Elias, A.; Tapponnier, P.; Singh, S.C.; King, G.; Briais, A.; Daëron, M.; Carton, H.; Sursock, A.; Jacques, E.; Jomaa, R.; Klinger, Y. Geology, Volume: 35, Issue: 8 p.: 755-758 (2007)
Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field, Singh, S. C.; Crawford, W. C.; Carton, H.; Seher, T.; Combier, V.; Cannat, M.; Canales, J. P.; Dusunur, D.; Escartin, J.; Miranda, J. M. Nature Aug 31, Volume: 442, Issue: 7106 p.: 1029-1032 (2006) Doi 10.1038/Nature05105

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