scholarly journals Broadband ambient noise surface wave tomography across the United States

2008 ◽  
Vol 113 (B5) ◽  
Author(s):  
G. D. Bensen ◽  
M. H. Ritzwoller ◽  
N. M. Shapiro
Keyword(s):  
United States ◽  
Surface Wave ◽  
Ambient Noise ◽  
The United States ◽  
Surface Wave Tomography ◽  
Wave Tomography

The velocity structure of the Carpathian zone from the ambient noise surface wave tomography

2014 ◽  
Vol 50 (5) ◽  
pp. 632-640 ◽  
Author(s):  
T. B. Yanovskaya ◽  
E. L. Lyskova ◽  
T. Yu. Koroleva
Keyword(s):  
Surface Wave ◽  
Ambient Noise ◽  
Velocity Structure ◽  
Surface Wave Tomography ◽  
Wave Tomography

scholarly journals The lithosphere-asthenosphere boundary observed with USArray receiver functions

2012 ◽  
Vol 4 (1) ◽  
pp. 1-31 ◽  
Author(s):  
P. Kumar ◽  
X. Yuan ◽  
R. Kind ◽  
J. Mechie
Keyword(s):  
Surface Wave ◽  
Receiver Function ◽  
The United States ◽  
Receiver Functions ◽  
Function Technique ◽  
Surface Wave Tomography ◽  
Entire Area ◽  
S Receiver Function ◽  
The Usa ◽  
Wave Tomography

Abstract. The dense deployment of seismic stations so far in the western half of the United States within the USArray project provides the opportunity to study in greater detail the structure of the lithosphere-asthenosphere system. We use the S receiver function technique for this purpose which has higher resolution than surface wave tomography, is sensitive to seismic discontinuities and has no problems with multiples like P receiver functions. Only two major discontinuities are observed in the entire area down to about 300 km depth. These are the crust-mantle boundary (Moho) and a negative boundary which we correlate with the lithosphere-asthenosphere boundary (LAB) since a low velocity zone is the classical definition of the seismic observation of the asthenosphere by Gutenberg (1926). Our S receiver function LAB is at a depth of 70–80 km in large parts of westernmost North America. East of the Rocky Mountains its depth is generally between 90 and 110 km. Regions with LAB depths down to about 140 km occur in a stretch from northern Texas over the Colorado Plateau to the Columbia Basalts. These observations agree well with tomography results in the westernmost USA and at the east coast. However, in the central cratonic part of the USA the tomography LAB is near 200 km depth. At this depth no discontinuity is seen in the S receiver functions. The negative signal near 100 km depth in the central part of the USA is interpreted by Yuan and Romanowicz (2010) or Lekic and Romanowicz (2011) as a recently discovered mid lithospheric discontinuity (MLD). A solution for the discrepancy between receiver function imaging and surface wave tomography is not yet obvious and requires more high resolution studies at other cratons before a general solution may be found. Our results agree well with petrophysical models of increased water content in the asthenosphere, which predict a sharp and shallow LAB also in continents (Mierdel et al., 2007).

Subsurface Imaging Using Ambient Noise Surface Wave Tomography in Areas with Limited Surface Access

2020 ◽  
Author(s):  
D. Hollis ◽  
S. Beaupretre ◽  
A. Kantsler ◽  
J. Ong ◽  
A. Mordret ◽  
...  
Keyword(s):  
Surface Wave ◽  
Ambient Noise ◽  
Subsurface Imaging ◽  
Surface Wave Tomography ◽  
Wave Tomography ◽  
Limited Surface

scholarly journals Surface Wave Tomography of the Alps Using Ambient-Noise and Earthquake Phase Velocity Measurements

2018 ◽  
Vol 123 (2) ◽  
pp. 1770-1792 ◽  
Author(s):  
Emanuel D. Kästle ◽  
A. El-Sharkawy ◽  
L. Boschi ◽  
T. Meier ◽  
C. Rosenberg ◽  
...  
Keyword(s):  
Surface Wave ◽  
Phase Velocity ◽  
Ambient Noise ◽  
Surface Wave Tomography ◽  
Velocity Measurements ◽  
Wave Tomography ◽  
The Alps

scholarly journals Passive Seismic Ambient Noise Surface Wave Tomography Applied to Two Exploration Targets in Ontario, Canada

2019 ◽  
Vol 2019 (1) ◽  
pp. 1-3
Author(s):  
Richard Lynch ◽  
Dan Hollis ◽  
John McBride ◽  
Nick Arndt ◽  
Florent Brenguier ◽  
...  
Keyword(s):  
Surface Wave ◽  
Ambient Noise ◽  
Surface Wave Tomography ◽  
Seismic Ambient Noise ◽  
Passive Seismic ◽  
Wave Tomography
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