P-waves from cross-correlation of seismic noise

P-waves from cross-correlation of seismic noise

[1] We present results from the cross-correlations of seismic noise recordings among pairs of stations in the Parkfield network, California. When performed on many station pairs at short ranges, the noise correlation function (NCF) is the passive analog to a shot gather made with active sources. We demonstrate the presence of both a P-wave and a Rayleigh wave in the NCF. A time-frequency analys...

Emergence of body waves from cross - correlation of short period seismic noise 1

Ambient noise correlation is now widely used in seismology to obtain the surface 6 waves part of the Green's function. More difficult is the extraction of body waves from noise 7 correlations. Using 42 temporary broad-band three components stations located on the 8 northern part of fennoscandian region, we identify high frequency (0.5-2 Hz) body waves 9 emerging from noise correlations for inte...

Emergence of body waves from cross-correlation of short period seismic noise

Seismic noise emission induced by seismic waves

The in situ rock undergoing different kinds of deformation accumulates elastic energy that can be released spontaneously o r under artificial effect. Triggering of energy can also be performed by means of a dynamic excitation caused by elastic waves. W e carried out special field investigations with the use of seismic vibrators (Vibroseis-like sources) to study the effect of the energy release ...

Local-scale cross-correlation of seismic noise from the Calico fault experiment

Most studies of seismic noise cross-correlation (NCC) have focused on regional/continental scale imaging using empirical surface-wave Green’s functions extracted from primary (0.05–0.08 Hz) and secondary (0.1–0.16 Hz) microseisms. In this work, we present the NCC results at higher frequencies ([0.5 Hz) from 6 months seismic noise recorded by a local array (*4 km aperture) deployed along the Cal...