Geophysical Journal International
Published on behalf of the Royal Astronomical Society
Edited by:
Jeannot Trampert (Editor-In-Chief)
Print ISSN: 0956-540X
Online ISSN: 1365-246X
Frequency: Monthly
Current Volume: 180 / 2010
Editorial Information
THE BOARD OF EDITORS
J. Trampert (Editor-In-Chief), Department of Earth Sciences, PO BOX 80021, 3508 TA Utrecht, the Netherlands
M. Korn (Deputy Editor-In-Chief), Institut für Geophysik und Geologie, Universität Leipzig, Talstr. 35, 04103 Leipzig, Germany
D. Agnew,University of California, La Jolla, CA, USA
F. Amelung, University of Miami, Miami, FL, USA
E. Appel, Institut für Geowissenschaften, Tübingen, Germany
Y. Ben-Zion, University of Southern California, Los Angeles, CA, USA
J. Brodholt, University College London, UK
B.A. Buffett, Univeristy of Chicago, Chicago, IL, USA
X.-F. Chen, School of Earth and Space Science, University of Science and Technology of China, China
M. Cocco, Istituto di Geofisica, Rome, Italy
A. Curtis, School of GeoSciences, University of Edinburgh, UK
M. Diament, Institut de Physique du Globe de Paris, Paris, France
C.J. Ebinger, University of Rochester, Rochester, NY, USA
M. Everett, Texas A&M, TX, USA
J. Francheteau, Université de Bretagne Occidentale, Brest, France
S. Goes, Imperial College London, UK
I. Grevemeyer, IFM-GEOMAR, Kiel, Germany
D. Halliday, Schlumberger Cambridge Research Limited, Cambridge, UK
R. Holme, Jane Herdman Laboratories, University of Liverpool, UK
M. Hort, Institut für Geophysik, Universität Hamburg, Germany
G.R. Keller, University of Oklahoma, School of Geology and Geophysics, OK, USA
J. Korenaga, Department of Geology and Geophysics, Yale University, CT, USA
F. Krüger, Institut für Geowissenschaften, Potsdam, Germany
S. Labrosse, Laboratoire de Sciences de la Terre, Lyon, France
C.G. Langereis, Paleomagnetic Laboratory, Utrecht University, the Netherlands
G. Laske, Scripps Institution of Oceanography, UCSD, CA, USA
J. Renner, Institute for Geology, Ruhr-University Bochum, Germany
O. Ritter, GeoForschungsZentrum Potsdam, Germany
C. Thomas, Westfälische Wilhelms Universität Münster, Germany
M. Unsworth, University of Alberta, Edmonton, Alberta, Canada
I. Velicogna, University of Colorado, Boulder, CO, USA
J. Virieux, Université Joseph Fourier - Grenoble I, France
EDITORIAL OFFICE
The Royal Astronomical Society, Burlington House, Piccadilly, London W1J 0BQ, UK
Editorial staff
Kim Clube, Sylvia Hales, Valerie Dennis
Fax: +44 207 494 0166
E-mail: gji@ras.org.uk
PRODUCTION OFFICE
Wiley-Blackwell, John Wiley & Sons, 101 George Street, Edinburgh EH2 3ES, UK
Production staff
Janet Marriott
Phone: +44 131 718 4410 (direct)
Fax: +44 131 226 3803
E-mail: gji@wiley.com
PEN PORTRAITS and CONTACT DETAILS
J. Trampert (Editor-In-Chief)
Department of Earth Sciences, PO BOX 80021, 3508 TA Utrecht, the Netherlands
E-mail: trampert@geo.uu.nl
Jeannot Trampert is a professor of geophysics in the Department of Earth Sciences at Utrecht University. His main interest is the study of the Earth's deep interior. More specifically, he investigates seismic anisotropy and the density structure in the mantle and core. A key focus of his approach is the reliability of seismic tomography and its interpretation in terms of temperature and composition. He has interests in all aspects of geophysical inverse theory and recently started to work on problems relevant to exploration geophysics.
Joined GJI Board 2005
M. Korn (Deputy Editor-In-Chief)
Institut für Geophysik und Geologie, Universität Leipzig, Talstr.35, 04103 Leipzig, Germany
Phone; + 49 341 9732803
Fax: + 49 341 9732809
E-mail: mikorn@uni-leipzig.de
Michael Korn is a theoretical seismologist. He is Professor of Theoretical Geophysics at the University of Leipzig. His main interest is in wave propagation theory and its application to real data sets. Over the past years he has worked on numerical modelling of wavefields and on the scattering of seismic waves in small scale heterogeneous structures. More recently he became interested in the new possibilities of experiments with temporary deployments of dense mobile seismological networks and in volcano seismology.
Section: Seismology.
Joined GJI Board 1998
Editors
D. Agnew
IGPP, M/C 0225, University of California, La Jolla, CA, 92093-0225, USA
Duncan Carr Agnew is a professor of geophysics at the Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California San Diego. His main research interest is in crustal deformation and most especially its measurement, which he pursues using GPS and strainmeters. He is also interested in data analysis methods, seismic and geodetic instrumentation, historical and statistical seismology, and earth and ocean tides.
Sections: Geodesy, Seismology, Tectonics
Joined GJI Board 2009
F. Amelung
Associate Professor, Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Sciences, 4600 Rickenbacker Causeway, Miami, FL, 33149, USA
Phone: 1-305-421-4949
Fax: 1-305-421-4632
E-mail: famelung@rsmas.miami.edu
Web: http://mgg.rsmas.miami.edu/faculty/famelung/
Falk Amelung is a professor of geophysics at the University of Miami, Florida. He is a geodesist and his general research interest is the deformation of the Earth's crust by tectonic and volcanic processes. He is particularly interested in using data derived from satellite radar interferometry and in tectonic-volcanic interaction.
Section: Geodesy, potential field and applied geophysics; Tectonics and geodynamics; Volcanology, geothermics, fluids and rocks.
Joined GJI Board 2009
E. Appel
Institut für Geowissenschaften, Sigwartstrasse 10, 72076 Tübingen, Germany
Phone: +49 7071 2974132
Fax: +49 7071 295842
E-mail: erwin.appel@uni-tuebingen.de
Erwin Appel, born November 1953, is professor of geophysics at the University of Tübingen, Germany, since 1990. His main research interests are palaeomagnetism, rockmagnetism and environmental magnetism. Magnetic domain structures were the first topic when he entered this field in 1980 for PhD. The most longterm studies deal with the geodynamic evolution of the Himalaya and Tibetan Plateau. A more applied research direction concerns the use of magnetic proxies for fast and cost-effective screening of environmental soil and sediment pollution. Besides magnetism he is also involved in applying and developing methods and strategies for shallow subsurface characterization.
Section: Geomagnetism, rock magnetism and palaeomagnetism.
Joined GJI Board 2004
Y. Ben-Zion
Department of Earth Sciences, University of Southern Califonia, Los Angeles, CA 90089-0740, USA.
Phone: +1-213-740 6734
Fax: +1-213-740 8801
E-mail: benzion@usc.edu
Yehuda Ben-Zion is a Professor of Geophysics at the University of Southern California. His research interests are focused on the physics of earthquakes and faults. Examples include theoretical studies on rupture dynamics, friction, damage rheology, and spatio-temporal evolution of earthquake and fault patterns. Related observational research topics include high-resolution seismic imaging of fault zone structures, analysis of seismic catalogues, and earthquake source properties.
Section: Seismology.
Joined GJI Board 2005
J. Brodholt
Dept. of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UK
John Brodholt obtained his Ph.D. from the University of Bristol in 1992, and he is now Professor of Mineral Physics at University College London. His main interest is in the study of the Earth's deep interior. More specifically he uses computational and experimental mineral physics to understand the properties of materials under mantle and core conditions. His recent work has focussed on the elastic properties core and mantle materials, as well as their transport properties. He also works with seismologists in order to apply these results directly to the Earth.
Joined GJI Board 2009
B. A. Buffett
Department of the Geophysical Sciences, 5734 S. Ellis Ave., HGS 449, Chicago, IL 60637, USA
Phone: 773/702-8107
E-mail: buffett@geosci.uchicago.edu
Web: http://geosci.uchicago.edu/people/faculty/buffett.shtml
Bruce Buffett is a professor in the Department of Earth and Planetary Science at the University of California, Berkeley. His research activities deal with the structure and dynamics of the Earth's deep interior. Specific research interests include the thermal evolution of the core, energy sources for the geodynamo, core-mantle interactions and large-scale deformation of the Earth.
Joined GJI Board 1996
X.-F. Chen
School of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China
Phone: +86-551-3600791
Fax: +86-551-3607386
E-mail: xfchen1@ustc.edu.cn
Xiaofei Chen is currently a professor of geophysics at University of Science and Technology of China (USTC). He had been a professor in Peking University for more than a decade before joining USTC recently. He received his PhD in Seismology in 1991 from University of Southern California in USA. His research actives cover the theoretical and computational seismology, such as the development of both analytical and numerical methods for modeling the seismic wave-filed in complex media, and theoretical studies on dynamics and kinematics of seismic source. His current research interest is focused on the synthetic study of the physics of earthquake and strong ground motion prediction, and application to seismic hazard mitigation.
Section: Seismology.
Joined GJI Board 2008
M. Cocco
Istituto Nazionale di Geofisica, Rome, Italy
E-mail: cocco@ingv.it
Massimo Cocco is a Director of Research at the Istituto Nazionale di Geofisica e Vulcanologia, sezione Seismology and Tectonophysics, Rome. His research interests are focused on the physics of earthquakes and faults. More specifically, his work deals with earthquake dynamics and fault interaction, seismicity patterns and fault frictional properties. He is interested in both theoretical studies and observational researches. He has interests in all aspects of the mechanics of earthquake and faulting from observations of natural faults through geophysical and geological measurements to experimental faults at the laboratory scale.
Joined GJI Board 2007
A. Curtis
School of GeoSciences, Grant Institute, Kings Buildings, University of Edinburgh, West Mains Rd., Edinburgh EH9 3JW, UK
Phone: +44 131 650 8515
Fax: +44 131 668 3184
E-mail: Andrew.Curtis@ed.ac.uk
Andrew Curtis is the Professor of Mathematical Geoscience at the University of Edinburgh, UK. He received a BSc (Hons) in Mathematics from the University of Edinburgh, and a DPhil in geodynamics and seismology from Oxford University. He was a postdoctoral scientist for three years in the Department of Theoretical Geophysics, Utrecht University, where he worked on lithospheric and upper mantle tomography. He then joined Schlumberger Cambridge Research where he worked for seven years. His interests include earthquake seismology, seismic and wavefield interferometry, time-reversal, inverse theory, tomography, survey and experimental design, and geological process modelling.
Joined GJI Board 2004
M. Diament
Université Paris Diderot - Institut de Physique du Globe de Paris, Géophysique spatiale et planétaire - Bâtiment Lamarck, Case 7011, 35 rue Hélène Brion, 75205 Paris Cedex 13, France
Phone: +33 1 57 27 84 80
Fax: +33 1 57 27 84 82
E-mail: diament@ipgp.jussieu.fr
Michel Diament is a researcher since 1990 at the Institut de Physique du Globe de Paris where he also teaches to undergraduate and graduate students. He previously worked as lecturer at the University of Orsay where he also got his PhD. His research has covered a wide range of topics in marine geophysics, mechanics of the lithosphere, intraplate volcanism, study of subduction zones, volcanological processes and Earth deformation and was based on the analysis and interpretation of marine geophysical, short period seismology and gravimetric data. In the recent years he focused his research on solving geodynamic problems using satellite gravimetry.
Joined GJI Board 2008
C.J. Ebinger
Department of Earth and Environmental Sciences, University of Rochester, 227 Hutchison Hall, Rochester, NY 14627, USA
E-mail: ebinger@earth.rochester.edu
Cindy Ebinger obtained a PhD in the MIT/Woods Hole Oceanographic Joint Program, followed by National Research Council and NATO Post-doctoral fellowships in the US and UK. After academic posts at Leeds University and at Royal Holloway University of London, she became Professor of Tectonics at the University of Rochester in 2006. Her research interests are in predictive models of rift basin formation, geophysical imaging of continental breakup, and plume-lithosphere interactions.
Joined GJI Board 2001
M.E. Everett
Department of Geology and Geophysics, Texas A&M, College Station, TX, USA
E-mail: everett@geo.tamu.edu
Mark Everett is a professor of theoretical and applied geophysics at Texas A&M University, where he has been on the faculty since 1995. His main research interests are in electromagnetic forward modeling and inversion, time series analysis and data processing, satellite and ground-based geomagnetic induction, non-seismic techniques in near-surface applied geophysics, marine controlled-source electromagnetics, and archaeological geophysics. His recent work has spanned a wide spectrum of topics: fundamental scaling behavior of EM signal-generated geologic noise; 3-D finite element analysis of EM induction in heterogeneous media; role of the external field in the establishment of the geodynamo; exploration of offshore gas hydrates; analysis of low-Earth orbiting satellite data; electromagnetic characterization of meteorite impact craters; WWII battlefield preservation.
Sections: Geodesy, potential field and applied geophysics; Geomagnetism, rock magnetism and palaeomagnetism.
Joined GJI Board 2004
J. Francheteau
Institut Universitaire Europeen de la Mer, UBO, Technopole Brest-Iroise, Place Nicolas Copernic 29280, Plouzane, France
Phone: + 33 2 98 49 8715
Fax: + 33 2 98 49 8760
E-mail: franch@univ-brest.fr
Jean Francheteau is a marine geophysicist who obtained his PhD in oceanography in 1970 at the Scripps Institution of Oceanography, La Jolla, California, after obtaining a diploma of mining engineering at the Ecole Nationale Supérieure de la Metallurgie et de l'Industrie des Mines de Nancy, France. After 11 years of research as a scientist at the Centre National pour l'exploitation des Oceans (CNEXO) in Brest, France, and about the same time as a physicist at the Institut de Physique du Globe de Paris, he took up his current position as a professor of geophysics at the Université de Bretagne Occidentale in Brest. His research has covered a wide range of topics: palaeomagnetism, heat flow, plate kinematics, marine geophysics, tectonics. His current research interest is in understanding the processes active in mid-ocean ridges. From 1991 to 1998 he has chaired the French national Dorsales programme, an active component of the InterRidge international initiative.
Joined GJI Board 1988
S. Goes
Department of Earth Science and Engineering, South Kensington Campus, Imperial College London, SW7 2AZ, UK
Phone: +44 (0)20 7594 6434
Fax: +44 (0)20 7594 7444
E-mail: s.goes@imperial.ac.uk
Saskia Goes is a geophysicist with research interests in lithosphere and mantle dynamics, which she investigates by combining constraints from (geophysical) data interpretation and dynamic modeling. Her recent work addressed subduction zone dynamics and plate motions, with applications to tectonic evolution and seismic hazard assessment, the physical interpretation of seismic spherical mantle structure, mantle plume dynamics and seismic expressions, and thermo-chemical structure of continents.
Sections: Geodesy, potential field and applied geophysics; Seismology; Tectonics and geodynamics.
Joined GJI Board 2008
I. Grevemeyer
IFM-GEOMAR, Marine Geodynamics, Wischhofstr. 1-3, 24148 Kiel, Germany
Phone: +49 431 600 2337
Fax: +49 431 600 2922
E-mail: igrevemeyer@ifm-geomar.de
Ingo Grevemeyer is a senior research scientist at the Leibniz Institute of Marine Sciences in Kiel (IFM-GEOMAR) and university lecturer at Kiel University, Kiel. His research has covered a wide range of topics in marine geophysics, including crustal seismology and heat flow surveys of mid-ocean ridges, hotspot provinces, and subduction zones. In recent years he focused his research on seismotectonics using ocean-bottom-seismic networks and global seismic data surveying seismic source mechanisms and rupture processes.
Joined GJI Board 2009
D. Halliday
Schlumberger Cambridge Research Limited, High Cross, Madingley Road, Cambridge, CB3 0EL, UK
Phone: +44 (0)1223 325230
E-mail: dhalliday@slb.com
David Halliday is a Research Scientist working in the Geophysics group at Schlumberger Cambridge Research. He received a BSc. (Hons) in Geophysics at the University of Edinburgh, and studied for a PhD in Geophysics, also at the University of Edinburgh. His research interests include seismic and wavefield interferometry, time-reversal, reciprocity and representation theorems, scattered surface waves, scattering theory, scattered noise attenuation, and stationary-phase analysis.
Joined GJI Board 2009
R. Holme
Jane Herdman Laboratories, University of Liverpool, UK
E-mail: r.t.holme@liverpool.ac.uk
Richard Holme is a reader in the School of Environmental Sciences at the University of Liverpool. His primary research focus is in observational geomagnetism, both modelling of data (particularly from satellites) and using the models to constrain the physics of the deep Earth, particularly the core-mantle boundary region. He has more general interests in all aspects of the Earth's magnetic field, geophysical inverse theory and data modelling in general, Earth rotation, dynamo theory, and all areas of geophysics applied to the core.
Sections: Geodesy, potential field and applied geophysics; Geomagnetism, rock magentism and palaeomagnetism.
Joined GJI Board 2004
M. Hort
Institut f. Geophysik, Univ. Hamburg, Bundesstr. 55, 20146 Hamburg, Germany
Phone: +49 40 42838 3969 or 2973
FAX: +49 40 42838 5441
E-mail: matthias.hort@zmaw.de
Matthias Hort is a geophysicist who obtained his PhD in geophysics in 1991 at the Institute of Planetology at the Westfälische-Wilhelms Universität Münster, Germany. After 2.5 years as PostDoc at Johns Hopkins University, Baltimore, USA, he joined GEOMAR in Kiel, Germany, in 1994 as an assistant professor until he became a faculty member at the University of Hamburg (Geophysics department) in 2003. Here he was appointed as a professor for marine geophysics and geophysical volcanology. His research interests are centered around volcanoes spanning from questions addressing melt generation and melt transport in the earth mantle all the way to quantifying volcanic eruption dynamics. His expertise is in theoretical and laboratory modelling of volcanological and geodynamic processes (fluid dynamics, convection, crystallization, eruptions, subduction, plumes), as well as carrying out field measurements at active volcanoes. Current research projects address the dynamics of bubbles during Strombolian eruptions, and plume-ridge interaction.
Sections: Tectonics and geodynamics; Volcanology, geothermics, fluids and rocks.
Joined GJI Board 2006
G. R. Keller
University of Oklahoma, School of Geology and Geophysics, OK, USA
E-mail: grkeller@ou.edu
G. Randy Keller is a Professor in the School of Geology and Geophysics at the University of Oklahoma and holder of the Edward Lamb McCollough Chair in Geophysics. His research interests stress the use of geophysics to solve geological questions and span a variety of techniques at a variety of scales. He has conducted many studies of the structure and evolution of the lithosphere around the world using seismic, gravity, magnetic, and remote sensing measurements integrated with geological data, often as part of large international cooperative efforts. He has been very involved in the Geoinformatics initiative and is interested in the development of databases, techniques that foster data integration, software tools, and web services.
Joined GJI Board 2004
J. Korenaga
Department of Geology and Geophysics, Yale University, PO Box 208109, New Haven, CT 06520-8109, USA
Phone: +1 (203) 432-7381
Fax: +1 (203) 432-3134
E-mail: jun.korenaga@yale.edu
Web: http://earth.geology.yale.edu/~jk525/
Jun Korenaga is a professor at Yale University. He has been working on the long-term thermal and chemical evolution of Earth and other terrestrial planets, by combining a range of geophysical and geochemical methods. He has also been active in crustal seismology in relation to the formation of large igneous provinces.
Sections: Marine geoscience; Seismology; Tectonics and geodynamics.
Joined GJI Board 2005
F. Krüger
Institut für Geowissenschaften, Univ. Potsdam, Karl Liebknechtstr. 24, 14476 Potsdam, Germany
Fax: +49 331 977 5700
E-mail: kruegerf@geo.uni-potsdam.de
Frank Krüger is a seismologist and staff scientist at the University of Potsdam. His research interests are in different fields of seismology, mainly teleseismic seismology and array seismology. One focus was the study of lower mantle and core mantle boundary structure. Current research: study of seismic source mechanisms and rupture processes with seismological arrays; imaging of structure of cratonic lithosphere.
Section: Seismology.
Joined GJI Board 2007
S. Labrosse
Laboratoire de Sciences de la Terre, ENS-Lyon, 46, allee d'Italie, 69364 LYON, Cedex 07, France
Phone: +33 04 72 72 85 15
Fax: +33 04 72 72 86 77
E-mail: Stephane.labrosse@ens-lyon.fr
Stéphane Labrosse is a professor at the Ecole Normale supérieure de Lyon. His research covers several aspects of the global dynamics and evolution of the Earth interior, including thermal, chemical and magnetic evolution of the core, heat transfer by mantle convection, core-mantle interactions. He also works on the dynamics and evolution of the early Earth, with a particular interest in core formation and magma oceans.
Joined GJI Board 2009
C. G. Langereis
Paleomagnetic Laboratory Fort Hoofddijk, Faculty of Earth Sciences, Utrecht University, Budapestlaan 17, 3584 CD Utrecht, the Netherlands
Phone: + 31 30 253 1668
Fax: + 31 30 253 1677
E-mail: langer@geo.uu.nl
Cor Langereis is a professor in palaeomagnetism and heads the palaeomagnetic laboratory Fort Hoofddijk of the Department of Earth Sciences at Utrecht University since 1995. His main research interest concerns variations of the geomagneticfield at all time scales with an emphasis on their reliable (or unreliable) recording in the geological record. This includes polarity reversals and the construction of (astronomical) polarity timescales, as well as the study of short-lived phenomena such as geomagnetic excursions and secular variation. Further research interests encompass the sedimentary NRM acquisition mechanism and thus the relation between palaeomagnetism and the (palaeo)environment, while he is also strongly involved in geodynamic and tectonic applications.
Joined GJI Board 2000
G. Laske
Scripps Institution of Oceanography, UCSD, CA, USA
E-mail: glaske@ucsd.edu
Gabi Laske is a research geophysicist at the Institute of Geophysics and Planetary Physics, where she has worked since 1994. Her primary research interests are the analysis of long-period seismic signals and seismic tomography on regional and global scales. Her most recent efforts include the extension of long-term passive seismic surveys to the ocean floor. Further research interests include the assembly of reference global models of crustal, mantle and core structure and the analysis of ambient noise.
Sections: Marine geoscience; Seismology; Tectonics and geodynamics.
Joined GJI Board 2004
J. Renner
Institute for Geology, Ruhr-University Bochum, D-44780 Bochum, Germany
E-mail: renner@geophysik.rub.de
After his dissertation at the Ruhr-University Bochum (RUB), Jörg Renner held postdoctoral fellowships and appointments at MIT and GFZ Potsdam before he became Professor for Experimental Geophysics at Ruhr-Universität Bochum in 2001. His major research interests are in two strongly linked topics, subsurface fluid transport and rheology of rocks. He addresses problems from groundwater flow near the surface, to oil, gas or geothermal energy production from the upper crust, to melt transport in the Earth's mantle by performing and analyzing field and laboratory experiments.
Joined GJI Board 2007
O. Ritter
GeoForschungsZentrum Potsdam, Section 2.2, Telegrafenberg, 14473 Potsdam, Germany
Phone: +49 / 331 / 288-1257
Fax: +49 / 331 / 288-1266
E-mail: oritter@gfz-potsdam.de
Oliver Ritter is a geophysicist at the GFZ Potsdam, Germany's national research centre for geosciences. He obtained a PhD at Edinburgh before joining the GFZ in 1996. His primary research focus is on all aspects of geomagnetic induction in the Earth. Over the last couple of years, he has been involved in a series of large scale magnetotelluric experiments to investigate active and fossil tectonic regimes in all parts of the world. He is particularly interested in multi-disciplinary, integrative interpretation approaches. He has also worked on electromagnetic data processing and modeling methods, the exploration of geothermal systems, and in geophysical volcanology. Being responsible for developing the MT component of the geophysical instrument pool of the GFZ he has a strong interest in geophysical instrumentation.
Main areas of interests: Magnetotelluric method, tectonics, integrative interpretation, geophysical instrumentation.
Sections: Geodesy, potential field and applied geophysics; Geomagnetism, rock magnetism and palaeomagnetism; Tectonics and geodynamics; Volcanology, geothermics, fluids and rocks.
Joined GJI Board 2006
C. Thomas
Institut für Geophysik, Westfälische Wilhelms Universität Münster, Corrensstr. 24, 48149 Münster, Germany
Christine Thomas is Professor at the Institute of Geophysics at the University of Münster since 2009 and has worked previously at the University of Liverpool. Her main research interests are array seismology and global seismology, especially of the Earth's mantle. Focus areas are the structures and processes of the core-mantle boundary region as well as the upper mantle discontinuities. This includes the investigation of seismic structures in the D" region and their link to the post-perovskite phase transition in, anisotropy in the D" region and fine-scale resolution of structures linked to mineral phase transitions in the upper mantle.
Section: Seismology
Joined GJI Board 2009
M. Unsworth
Institute for Geophysical Research, Department of Physics, 545B, University of Alberta, Edmonton, Alberta, T6G 2J1, Canada
Phone: + 780 492 3041
E-mail: unsworth@phys.ualberta.ca
Martyn Unsworth is a Professor at the University of Alberta in Canada. After graduate studies at Cambridge University in marine geophysics, he has held positions at Los Alamos National Laboratory, the University of British Columbia and the University of Washington in Seattle. His primary research interest is in the development and application of electromagnetic exploration methods in geophysics. He has worked on the development of nu¬merical modeling and inversion techniques for controlled source electromagnetic data, and has applied electromagnetic exploration techniques to solve a range of tectonic problems. In recent years this has included studies of active fault zones, mid-ocean ridges and the Tibetan Plateau. He is also interested in the application of these methods in environmental geophysics and mineral exploration.
Sections: Geomagnetism, rock magnetism and palaeomagnetism; Tectonics and geodynamics; Volcanology, geothermics, fluids and rocks.
Joined GJI Board 1998
I. Velicogna
Department of Physics, University of Colorado, Campus Box 390, Boulder, CO 80309-0390, USA
E-mail: isabella@giove.colorado.edu
Isabella Velicogna obtained her PhD in applied geophysics at the University of Trieste, Italy. At present she is research scientist II at the University of Colorado. She is member of the Gravity recovery And Climate Experiment (GRACE) science Team. Her general field of research is geodesy. Her research interests is particularly focused on the use and modeling of satellite geodesy measurements. Particularly she studies the use of gravity observations from GRACE to monitor various geophysical processes, including hydrology, meteorology, glaciology, and solid earth physics. Much of her research is focused on using different satellite data in combination with ground based measurements to study different component of the water cycle. Recent research application include monitoring of the seasonal and secular variability of ice sheet mass variations and study of the Eurasia freshwater cycle.
Section: Seismology
J. Virieux
Université Joseph Fourier - Grenoble I, France
E-mail: Jean.Virieux@obs.ujf-grenoble.fr
Jean Virieux is a Professor of Geophysics at the University of Grenoble I - Joseph Fourier. His research interests cover topics on seismic wave propagation for seismic source modelling and for seismic imaging. Both kinematic and dynamic finite earthquake sources are of interest to him in order to better predict ground motion. Both active seismic field related to seismic exploration and passive seismic monitoring related to geodynamics or reservoir tracking have concentrated his modelling effort. A few key words may be listed where he has made contributions: seismic tomography; numerical modelling (Finite Difference, Finite Volume), dynamic rupture modelling of earthquakes, ray theory, ray seismograms, asymptotic theory of wave propagation, waveform inversion (Born or Rytov approximation), inverse problems.
Joined GJI Board 2006
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