Collaborative Research: Crustal Accretion and Mantle Processes Along the Subduction-Influenced Eastern Lau Spreading Center

Lead PI: Dr. Spahr C. Webb , Dr. William H Menke

Unit Affiliation: Seismology, Geology and Tectonophysics, Lamont-Doherty Earth Observatory (LDEO)

September 2008 - August 2014
Pacific Ocean
Project Type: Research

DESCRIPTION: Ambient seismic noise will be recorded over the Eastern Lau Spreading Center for 13 months and then analyzed for ambient noise cross correlation tomography, body wave tomography, surface wave phase velocities, body wave attenuation, and shear wave splitting.

OUTCOMES: 51 OBSs were recovered and the recorded seismic ambient noise has been partially processed. 3-D numerical modeling of previous results from the EPR has been modeled. Two one-time publications.


National Science Foundation (NSF)





Yang Zha, Spahr C. Webb, S. Shawn Wei, Douglas A. Wiens, Donna K. Blackman, William Menke, Robert A. Dunn, and James A. Conder. "Upper mantle shear velocity structure along the Eastern Lau Spreading Center from OBS ambient noise tomography," Earth and Planet. Sci. Lett, v.408, 2014, p. 194.

Zha, Yang, Spahr C. Webb, and William Menke. "Determining the orientations of ocean bottom seismometers using ambient noise correlation," Geophysical Research Letters, v.40, 2013, p. 3585. doi:doi:10.1002/grl.50698


body waves crustal accretion surface waves tomography ambient seismic noise mantle processes eastern lau spreading center phase velocity ocean bottom seismographs seismology geology and tectonics shear wave splitting


Earth fundamentals