An Example of Imaging Deeper using Extended Vibroseis Cross-Correlation

Evaluation of extended correlation on shallow Vibroseis data

Knowledge of subsurface material response to seismic waves is important in developing a site-response model. Seismic velocities give insight into precautions that should be taken in anticipation of an earthquake. The method of fixed bandwidth extended Vibroseis correlation was used to extract reflections deeper than conventionally accomplished with only a 2-second listen time. A method to accur...

Evaluation of Intrauterine Structural Pathology by Three-Dimensional Sonohysterography Using An Extended Imaging Method

Vector Velocity Imaging Using Cross-Correlation and Virtual Sources

Previous investigations have shown promising results in using the directional cross-correlation method to estimate velocity vectors. The velocity vector estimate provides information on both velocity direction and magnitude. The direction is estimated by beamforming signals along directions in the range [0◦; 180◦[ and identifying the direction that produces the largest correlation across emissi...

Live imaging looks deeper

Iodixanol provides an easy and affordable solution to a problem that has limited resolution and brightness when imaging living samples.

Cross-correlation imaging of ambient noise sources

S U M M A R Y We develop and apply a novel technique to image ambient seismic noise sources. It is based on measurements of cross-correlation asymmetry defined as the logarithmic energy ratio of the causal and anticausal branches of the cross-correlation function. A possible application of this technique is to account for the distribution of noise sources, a problem which currently poses obstac...