We use the nonstationary equivalent of the Fourier shift theorem to derive a general one-dimensional integral transform for the application and removal of certain seismic data processing steps. This transform comes from the observation that many seismic data processing steps can be viewed as nonstationary shifts. The continuous form of the transform is exactly reversible, and the discrete form ...

A new ray-based approach for converting multicomponent normal moveout uncorrected offset domain prestack seismic data into angles is presented. From any two-way zero-offset time sample and a given angle of incidence, the exact ray and a few neighboring rays that contribute to the given angle of incidence are traced through the medium to their corresponding source and receiver locations to compu...

In the presence of background noise, arrival times picked from a surface microseismic data set usually include number false picks that can lead to uncertainty in location estimation. To eliminate and improve accuracy estimates, we develop an association algorithm termed RANSAC-based Arrival Time Event Clustering (RATEC) clusters into event groups based on random sampling fitting moveout curves ...

Teleseismic receiver functions (RFs) from a yearlong broadband seismological experiment in Kamchatka reveal regional variations in the Moho, anisotropy in the supra-slab mantle wedge, and, along the eastern coast, Ps converted phases from the steeply dipping slab. We analyze both radialand transverse-component RFs in bin-averaged epicentral and backazimuthal sweeps, in order to detect Ps moveou...

We analyze the kinematic properties of offset-domain Common Image Gathers (CIGs) and Angle-Domain CIGs (ADCIGs) computed by wavefield-continuation migration. Our results are valid regardless of whether the CIGs were obtained by using the correct migration velocity. They thus can be used as a theoretical basis for developing Migration Velocity Analysis (MVA) methods that exploit the velocity inf...

Abstract We image the Zhaotong-Ludian fault (ZLF) in southeastern margin of Tibetan plateau (SE plateau) using waveforms from local and teleseismic earthquakes recorded by 14 seismic stations. identify two types zone head wave (FZHW) clusters applying an automatic picking algorithm a horizontal particle motion analysis. The first type FZHWs shows linear time–distance moveout is only observed at...

Offset is a geometrical nuisance when reflectors have dip. For this reason, we develop migration methods here and in the next chapter for forming images from hypothetical zero-offset seismic experiments. Although there is usually ample data recorded near zerooffset, we never record purely zero-offset seismic data. However, when we consider offset and dip together in chapter ?? we will encounter...