| | PLUME Publications and Presentations |
Rychert, C.A., Laske, G., Harmon, N. and Shearer, P.M., Seismic imaging of melt in a displaced Hawaiian plume. Nature Geoscience, 6, 657-660, doi:10.1038/ngeo1878, 2013. Reprint upon request to glaske@ucsd.edu paper at Nature Geoscience
2012Collins, J.A., Wolfe, C.J. and Laske, G., Shear wave splitting at the Hawaiian hot spot from the PLUME land and ocean bottom seismometer deployments. Geochemistry Geophysics Geosystems. 13 DOI:10.1029/2011gc003881, 2012. Reprint upon request to glaske@ucsd.edu : paper at G-cubed
2011Laske, G., Markee, A., Orcutt, J.A. Wolfe, C.J., Collins, J.A., Solomon, S.C., Detrick, R.S., , Bercovici, D. and Hauri, E.H., Asymmetric Shallow Mantle Structure beneath the Hawaiian Swell - Evidence from Rayleigh Waves Recorded by the PLUME network. Geophys. J. Int., 187, 1725-1742, 2011. download preprint (incl supplement) paper at gji
Anchieta, M.C., Wolfe, C.J., Pavlis, G.L., Vernon, F.L., Eakins, J.A., Solomon, S.C., Laske, G. and Collins, J.A., Seismicity around the Hawaiian Islands Recorded by the PLUME Seismometer Networks: Insight into Faulting near Maui, Molokai, and Oahu. Bull. Seismol. Soc. Am., 101, 1742-1758, 2011. Reprint upon request to glaske@ucsd.edu paper at BSSA
Wolfe, C.J., Solomon, S.C., Laske, G., Collins, J.A., Detrick, R.S., Orcutt, J.A., Bercovici, D. and Hauri, E.H., Mantle P-wave velocity structure beneath the Hawaiian hotspot. Earth Planet Sci. Lett., 303, 267-280, 2011. Reprint upon request to glaske@ucsd.edu paper at EPSL
2010Leahy, G.M., Collins, J.A., Wolfe, C.J., Laske, G. and Solomon, S.C., Underplating of the Hawaiian Swell: evidence from teleseismic receiver functions. Geophys. J. Int., 183, 313-329, 2010. Reprint upon request to glaske@ucsd.edu paper at GJI
2009Wolfe, C.J., Solomon, S.C., Laske, G., Collins, J.A., Detrick, R.S., Orcutt, J.A., Bercovici, D. and Hauri, E.H., Mantle Shear-wave Velocity Structure Beneath the Hawaiian Hot Spot. Science, 326, 1388-1390, 2009. Reprint upon request to glaske@ucsd.edu paper at Science
Laske, G., Collins, J.A., Wolfe, C.J., Solomon, S.C., Detrick, R.S., Orcutt, J.A., Bercovici, D. and Hauri, E.H., 2009. Probing The Hawaiian Hot Spot With New Ocean Bottom Instruments, EOS Trans. AGU, 90, 362-363. complete pdf (incl. supplement) paper at EOS
Project SWELL: 2007
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
NB: the GSA reprint available at GSA does not include the supplements that are available online at GSA.
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 paper at GRL
Laske, G., Markee, A., Orcutt, Collins, J.A., J.A., Wolfe, C.J., Solomon, S.C., Detrick, R.S., Bercovici, D.A. and Hauri, E.H., Surface Waves from the Hawaiian PLUME Project Trace Anomalously Slow Lithosphere and Asthenosphere. Geophys. Res. Abstr., 11, EGU2009-6525, 2009. pdf
This poster was an updated version of Markee's AGU 2008 poster. We presented a preliminary tomographic image of the upper 200km covering the PLUME 2 array. The model is consistent with the PLUME 1 model. Anomalies do not extend significantly beyond the PLUME 1 area though an intriguing anomaly south of Kauai remains to be interpreted.Markee, A., Laske, G., Collins, J.A., Wolfe, C.J., Solomon, S.C., Detrick, R.S., Orcutt, J.A., Bercovici, D.A. and Hauri, E.H., Surface Wave Tomography for the Hawaiian PLUME Project and the Seismic Structure of the Hawaiian Swell. EOS Trans. AGU, Fall Meeting Suppl., 89(52), DI21A-1723, 2008. pdf
This poster presented a preliminary tomographic image of the upper 200km covering the PLUME 1 array. Anomalies are in nicely continue the anomalies found during the SWELL experiment to the west of the island of Hawaii. We also showed phase velocity maps for the PLUME 2 array. Anomalies appear to be slightly asymmetric, reflecting the asymmetry of the bathymetric swell. Lower velocities found on the western side of the Hawaiian swell where the seafloor is shallower than on the eastern side. The signal in the velocity anomalies are opposite of that of the difference in bathymetry, i.e. seismic anomalies cannot be explained by not taking into account the bathymetry (in fact, not doing this may mute some of the mantle anomalies).Wolfe, C.J., Solomon, S.C., Laske, G., Collins, J.A., Detrick, R.S., Orcutt, J.A., Bercovici, D.A. and Hauri, E.H., S-wave tomographic imaging of the mantle beneath the Hawaiian Islands from the PLUME deployments of ocean-bottom and land seismometers. EOS Trans. AGU, Fall Meeting Suppl., 89(52), DI21A-1725, 2008. pdf
This poster presented preliminary tomographic images of the upper mantle and upper lower mantle beneath Hawaii. To enhance resolution in the lower mantle, the S-wave dataset was augmented with SKS-travel times. We find low velocity anomalies beneath Hawaii that can be traced to a depth of between 1000 and 1500 km.Collins, Wolfe, C.J., Laske, G., Solomon, S.C., J.A., Detrick, R.S., Orcutt, J.A., Bercovici, D.A. and Hauri, E.H., Mantle Anisotropy Beneath the Hawaiian Islands from Measurements of Shear-wave Splitting: Results from the PLUME Ocean-Bottom and Land Seismograph Deployments. EOS Trans. AGU, Fall Meeting Suppl., 89(52), DI21A-1727, 2008. pdf
This poster presented preliminary measurements of shear-wave splitting. Splitting measurements were typically made in the frequency band 0.05-0.1 Hz in order to minimize tilt-generated noise at the low-frequency end and microseismic noise at the high end. About 5 events per station yielded good splitting measurements. The geographical distribution of fast-polarization azimuths does not show an obvious signature of a localized center of mantle upwelling and divergence. The variability in the delay times across the different stations may indicate differences in either the degree of anisotropy or thickness of the anisotropic lithosphere.Laske, G., Markee, A., Orcutt, J.A., Wolfe, C.J., Solomon, S.C., Collins, J.A., Detrick, R.S., Bercovici, D.A. and Hauri, E.H., The Hawaiian PLUME Experiment and its Initial Data Assessment. Proceedings of the Goldschmidt Conference , 2008. pdf
This invited talk summarized the work described in previous presentations. the Rayleigh wave dispersion analysis of the first OBS deployment together with the preliminary tomographic image of the upper 200 km. We also showed initial dispersion curves for the second deployment where we find no significant anomaly to the southeast of the Hawaiian islands. We also presented much improved locations of earthquakes detected with land stations and additional events that were undetected by land stations. We also presented a preliminary body wave tomographic image.Laske, G., Markee, A., Orcutt, J.A., Wolfe, C.J., Solomon, S.C., Collins, J.A., Detrick, R.S., Bercovici, D.A. and Hauri, E.H., Surface Wave Data Collected During the First Hawaiian PLUME OBS Deployment. Geophys. Res. Abstr., 10, EGU2008-A-01449, 2008. pdf
This invited talk was a continuation of the work described in Markee's AGU 2007 poster. We presented the Rayleigh wave dispersion analysis of the first OBS deployment. We also showed preliminary tomographic images of the upper 200km. We find relatively low shear velocities near 60km depth. This anomaly persists to greater depths to the west of the Hawaiian Islands.Laske, G., Orcutt, J.A., Collins, Detrick, R.S., J.A., Wolfe, C.J., Solomon, S.C., Bercovici, D.A. and Hauri, E.H., Broadband ocean Bottom Instruments Record Earth's Free oscillations during the Hawaiian PLUME Experiment. EOS Trans. AGU, Fall Meeting Suppl., 88(52), S23A-1107, 2007. pdf
This poster showed typical, best and worst performing OBS sites of the PLUME deployment. Comparisons of noise spectra were made with those of land observatory seismometers and with surface and buried ocean bottom installations of the OSN borehole pilot site OSN1. For the vertical seismometer component, many PLUME spectra compared very favorably with those of the land observatories. Free oscillation spectra were shown for some of great earthquakes in 2007 and compared to the OSN1 spectra of the March 25, 1998 Balleny Islands earthquake. PLUME may well be the first OBS experiment for which low-frequency free oscillations were observed on unburied seismometers.Wolfe, C.J., Solomon, S.C., Laske, G., Collins, J.A., Detrick, R.S., Orcutt, J.A., Bercovici, D.A. and Hauri, E.H., Body--wave tomography at Hawaii from the first PLUME deployment of ocean--bottom seismometers. EOS Trans. AGU, Fall Meeting Suppl., 88(52), V33B-1380, 2007. pdf
This poster presented preliminary P and S tomographic images of the upper mantle beneath Hawaii. We find low velocity anomalies beneath Hawaii that likely give rise to the volcanism observed near the surface.Markee, A., Laske, G., Collins, J.A., Wolfe, C.J., Solomon, S.C., Detrick, R.S., Orcutt, J.A., Bercovici, D.A. and Hauri, E.H., Surface wave data collected during the first Hawaiian PLUME OBS deployment. EOS Trans. AGU, Fall Meeting Suppl., 88(52), V33B-1382, 2007. pdf
This poster presented preliminary surface wave phase velocity curves collected during the first PLUME deployment. Relatively fast velocities are found to the southeast of the island of Hawaii that are consistent with those of a 100 Myr old lithosphere. Low velocities to the west of the island of Hawaii suggest the presence of and anomaly that is consistent with that found during the 1997/1998 SWELL experiment.Anchieta, M.C., Wolfe, C.J., Laske, G., Collins, J.A., Solomon, S.C., Detrick, R.S., Orcutt, J.A., Bercovici, D.A., Hauri, E.H., Pavlis, G.L., Eakins, J.A. and Vernon, F.L., Characterizing offshore earthquakes at Hawaii recorded by the first PLUME temporary ocean--bottom seismometer network. EOS Trans. AGU, Fall Meeting Suppl., 88(52), V33B-1383, 2007. pdf
This poster presented oceanic earthquakes that were observed during the first PLUME deployment. Many offshore event could only be seen on several OBSs, i.e. were not detected by land installations. Less events were detected on the differential pressure sensor than on the seismometer, questioning the promise of using these sensors to improve knowledge of offshore seismicity patterns.Laske, G., Collins, J.A., Wolfe, C.J., Weeraratne, D., Solomon, S.C., Detrick, R.S., Orcutt, J.A., Bercovici, D.A. and Hauri, E.H., The Hawaiian PLUME Project Successfully Completes its First Deployment. EOS Trans. AGU, Fall Meeting Suppl., 87(52), V13B-0657, 2006. pdf
This poster presented the array layout and instrument and data harvest of the first OBS deployment. We recovered 32 of the 35 deployed OBSs. Vertical component seismograms and spectra are compatible with those on land in the long-period range (120-20s) while the microseismic noise dominates at shorter periods. Noise levels are relatively high on the horizontal components but we are able to assemble meaningful seismic datasets.Laske, G., The Hawaiian PLUME Experiment. Proceedings of the 1st PLUME Project Workshop of the International Lithosphere Program, St. Odile, France, 2006. pdf
This invited talk introduced the array layout of the PLUME project. The talk also discussed the challenges to record broad-band seismic data on the ocean floor. Preliminary Rayleigh wave dispersion curves were presented to emphasize that we are able to resolve subtle differences in structure beneath the Hawaiian swell.Dalton, R., A Window on the Inner Earth. Nature, 421, 10-12, 2003. pdf.
This news feature by Nature science writer Rex Dalton describes the PLUME project and the geological and geodynamical background of the Hawaiian island chain in anticipation of the upcoming OBS deployments.Laske, G., Examples of Possible Projects: Intraplate swell/hotspot experiment. in:Forsyth, D. and Detrick, B. "Oceanic Mantle Dynamics Science Plan", Brown University and WHOI, 2000.
PLUME was featured as an example of how a large long-term OBS deployments can further our understanding of mantle dynamic processes. The science plan can be downloaded from the OMD website.