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The crust and uppermost mantle structure of Southern Peru from ambient noise and earthquake surface wave analysis
Central Andes flat subduction surface wave tomography
2014/4/10
Southern Peru is located in the northern Central Andes, which is the highest plateau along an active subduction zone. In this region, the Nazca slab changes from normal to flat subduction, with the as...
Spurious velocity changes caused by temporal variations in ambient noise frequency content
Time-series analysis Interferometry Surface waves and free oscillations Coda waves
2014/4/10
Ambient seismic noise cross-correlations are now being used to detect temporal variations of seismic velocity, which are typically on the order of 0.1 per cent. At this small level, temporal variation...
Locating a scatterer in the active volcanic area of Southern Peru from ambient noise cross-correlation
Interferometry Wave scattering and diffraction Volcanic arc processes
2014/4/10
We report on a strong scatterer of seismic energy in the 5–10 s period range located in the volcanic arc of Southern Peru. It is superficially like an active noise source in that it produces a continu...
High-resolution 3D shallow crustal structure in Long Beach, California: Application of ambient noise tomography on a dense seismic array
High-resolution 3D shallow crustal structure in Long Beach California ambient noise tomography on a dense seismic array
2014/4/10
Ambient noise tomography has proven to be effective in resolving shallow earth structure. We applied ambient noise tomography on a dense seismic array in Long Beach, California. The array was composed...