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Mr. S.

COURSES:   SIO15/ERTH 15 Web site   SIO 227b 2004 Web site  
A brief page on volcanoes and volcanism in S.D. county 
Work Address: Gabi Laske
              IGPP-0225
              U.C. San Diego
              La Jolla, Ca 92093-0225

Office phone: (858) 534-8774 
Fax:          (858) 534-5332 
Email:        glaske@ucsd.edu

Home Phone:   (858) 457-4604
.

Projects:

The Hawaiian PLUME Experiment

The centerpiece of this project is a two-stage OBS deployment to image the Hawaiian mantle plume and its plumbing system.
The first array was deployed in January 2005 and first data will be retrieved in 2006.
This work is funded by the OCE section of NSF. Matching funds are provided by the SIO director's office.

Reference Earth Model Web Site

The time has come to revisit the question of spherically-symmetric reference Earth models and to begin the process of developing reference 3D models and datasets.
This Web site will be maintained to collect and distribute data, models and computer code from and to participants of the REM initiative.
This work is funded by the CSEDI section of NSF.

A Global Crustal Model at 2x2 degrees (March 2000)

This model is an update of CRUST 5.1 and takes advantage of our digital 1deg sediment map (see below) and our ongoing effort to compile crustal thickness on a 1deg grid.
This work is funded by NSF and a IGPP-mini grant with LLNL.

A global digital map of sediment thickness

This work has not been published (yet) but the sediment model is available on anonymous ftp (and widely used). Please provide feedback. This work was done in our spare time and funded by NSF.

The Scripps 3D mantle models

This page points you to our collection of 3D mantle models (old and new).
This work is a continuing effort to burn our spare time and, yes, funded by NSF.

Normal Modes and the Rotation of the Inner Core (July 2002)

This page summarizes a contribution to a new AGU Monograph on the Inner Core. This work was presented most recently the SEDI meeting July 2002, Lake Tahoe, CA, USA.
This research was funded by NSF.

Project SWELL (to be updated)

 Seismic Wave Exploration of the Lower Lithosphere beneath the Hawaiian Swell.
We do have a model of 3D shear velocity structure beneath the pilot array.

This work is funded by the MG&G section of OCE-NSF.

CRUST 5.1: A new global crustal model

In collaboration with Walter D. Mooney (USGS, Menlo Park)

Global Maps of Long-Period Surface Wave Dispersion

Polarization of Long-Period Surface Waves/Station Misalignment

Publications

Directions to my office

Geophysics at Karlsruhe, the place I come from.

Black Forest Observatory, the quietest site on Earth

Publications:

Laske, G., Phipps Morgan, J. and Orcutt, J.A., The Hawaiian SWELL Pilot Experiment - Evidence for Lithosphere Rejuvenation from OCean Bottom Surface Wave Data, GSA Special Paper 430, doi: 10.1130/2007.2430(11), 2007. pdf preprint

Laske, G. and Widmer-Schnidrig, R., Normal Mode & Surface Wave Observations. in: "Treatise on Geophysics, Volume 1: Seismology and Structure of the Earth", in press, 2007. pdf preprint
NB: author order in the printed version is reverse/wrong.

Zhou, Y., Nolet, G., Dahlen, F.A. and Laske, G., Global upper mantle structure from finite-frequency surface-wave tomography. J. Geophys. Res., 111, B04304, doi:10.1029/2005/JB003677, 2006. pdf

Zhou, Y., Dahlen, F.A., Nolet, G. and Laske, G., Finite-frequency effects in global surface-wave tomography. Geophys. J. Int., 163, 1087-1111, 2005. pdf

Park, J., Song, T.A., Tromp, J., Okal, E., Stein, S., Roult, G., Clevede, E., Laske, G., Kanamori, H., Davis, P., Berger, J., Braitenberg, C., Vam Camp, M., Lei, X., Sun, H., Xu, H. and Rosat, S. Earth's Free Oscillations Excited by the 26 December 2004 Sumatra-Andaman Earthquake. Science, 308, 1139-1144, 2005. pdf

Butler, R., Lay, T., Creager, K., Earle, P., Fischer, K., Gaherty, J., Laske, G., Leith, B., Park, J., Ritzwoller, M., Tromp, J. and Wen, L., The Global Seismographic Network Surpasses Its Design Goal. EOS Trans. AGU, 85, 225-229, 2004. pdf

Laske, G. and Masters, G., The Earth's Free Oscillations and the Differential Rotation of the Inner Core. AGU Geodynamics series, "Earth's Core; Dynamics, Structure, Rotation", Vol. 31, 5-21, 2003.

Cotte, N. and Laske, G., Testing group velocity maps for Eurasia Geophys. J. Int., 150, 639-650, 2002. pdf

Laske, G. and Cotte, N., Surface Wave Waveform Anomalies at the Saudi Seismic Network, Geophys. Res. Let., 28, 4383-4386, 2001. pdf

Masters, G., Laske, G. and Gilbert, F., Large-scale Earth Structure from Analyses of Free-Oscillation Splitting and Coupling, In: E. Boschi, G. Ekstroem and A. Morelli (eds.) "Problems in Geophysics for the New Millenium", Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, 255-288, 2000.

Masters, G., Laske, G. and Gilbert, F., Matrix autoregressive analysis of free-oscillation coupling and splitting. Geophys. J. Int. (Knopoff Festschrift), 143, 478-489, 2000. pdf

Zuern, W., Laske, G., Widmer-Schnidrig, R. and Gilbert, F., Observation of Coriolis coupled modes below 1 mHz, Geophys. J. Int., 143, 113-118, 2000. pdf

Masters, G., Laske, G. and F. Gilbert, Autoregressive Estimation of the Splitting Matrix of Free-Oscillation Multiplets. Geophys. J. Int., 141, 25-42, 2000. pdf

Masters, G., Laske, G. Bolton, H. and A. Dziewonski, The relative behavior of shear velocity, bulk sound speed, and compressional velocity in the mantle: implications for chemical and thermal structure. AGU Monograph series, "Seismology and Mineral Physics", Vol. 117, 63-87, 2000.

Laske, G. and G. Masters, Limits on differential rotation of the inner core from an analysis of the Earth's free oscillations. Nature, 402, 66-68, 1999. pdf

Laske, G., Phipps Morgan J. and J.A. Orcutt, First results from the Hawaiian SWELL Pilot Experiment. Geophys. Res. Let., 26, 3397-3400, 1999. pdf

Laske, G. and G. Masters, Surface wave polarization data and global anisotropic structure. Geophys. J. Int., 132, 508-520, 1998.

Mooney, W.D., G. Laske and G. Masters, CRUST 5.1: A global crustal model at 5 x 5 degrees. J. Geophys. Res., 103, 727-747, 1998.

Laske, G. and G. Masters, Constraints on global phase velocity maps by long-period polarization data. J. Geophys. Res., 101, 16,059-16,075, 1996.

Masters, G., S. Johnson, G. Laske and H. Bolton, A shear-velocity model of the mantle. Phil. Trans. R. Soc. London A, 354, 1285-1411, 1996.

Laske, G., Global observation of off-great circle propagation of long-period surface waves. Geophys. J. Int., 123, 245-259, 1995.

Laske G., G. Masters and W. Zürn, Frequency-dependent polarization measurements of long period surface waves and their implications for global phase velocity maps. Phys. Earth Planet. Int., 84, 111-137, 1994. pdf

Laske G., Frequency-dependent polarization measurements of long period surface waves and their implications for global phase velocity maps. Doctoral Thesis, Universität Karlsruhe, Germany, 1993.

Zürn W., H.-G. Wenzel and G. Laske, High quality data drom LaCoste-Romberg gravimeters with electrostatic feedback: A challenge for superconducting gravimeters. Bull. d'Informations Marees Terrestres, 110, 7940-7952, 1991.

Koptschalitsch, G., Die Anwendung der zeitvariablen Filterung bei der Eigenschwingungsanalyse, Diploma Thesis, Universität Karlsruhe, Germany, 1987.

Mechie, J., C. Prodehl and G. Koptschalitsch, Ray path interpretation of the crustal structure beneath Saudi Arabia. Tectonophysics, 131, 333-352, 1986.

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Directions to my office (Munk Lab #324):

Show me the MAP.

From I5 (southbound), go west on La Jolla Village Dr., ~1.25 Miles left on La Jolla Shores Dr., in ~.75 miles, near the bottom of the hill the road makes a sharp left turn. Just after this bend turn Right on Biological Grade (watch for bikers). This road makes a sharp left in about 100 yards follow it through a parking lot etc. until you come to a redwood building on your right and a redwood staircase on your left. The building on the right is where I work, the Munk lab. I'm on the main floor in office 324.

From I5 (northbound), go west on La Jolla Parkway (formerly Ardath), down the hill. Turn right at second traffic light (Hotel La Jolla on the right). Continue for ~1.5 Miles. You will pass the IGPP bridge. After that bridge, turn left on Biological Grade. From there, see above.

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