Physical Acoustics Lab

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Welcome

The Physical Acoustics Laboratory (PAL) is part of the Department of Geosciences at Boise State University. Our interests are many, but center around wave propagation in disordered media for applications in Geophysics ranging from seismic exploration to CO2 sequestration and geothermal exploration. Particularly, we are interested in extracting information from multiply scattered waves in heterogeneous media. In the lab, these waves are recorded via noncontacting techniques. For a more complete list of ongoing research at the PAL click, see Research Topics or the papers page.

Kasper van Wijk 16:49, 26 November 2007 (MST)

People

Research

For a more complete list of ongoing research at the PAL click, see Research Topics. Publications stemming from these projects can be found on the papers page.

The virtual refraction

Real shot record for a source at 0 offset.
Real shot record for a source at 0 offset.
Over the past few months we have been studying what happens to refracted waves during interferometric imaging. We've found that spurious energy related to the correlation of refracted waves at two receivers yields an estimate of subsurface parameters.
Virtual shot record using a line of 110 sources to the left of the receivers.
Virtual shot record using a line of 110 sources to the left of the receivers.
To date, we have only applied this technique to numerical data with the exception of one real data set from the 2007 BSU/CSM undergraduate field camp. In this new technique we replace the conventional time-intercept approach with one that uses only the virtual and real refractions to estimate the velocity and thickness of the layer above the refractor. To do this we need three pieces: 1) estimate of the lower layer velocity from the virtual shot record; 2) the critical offset, determined from the correlation gather between any two receivers; and 3) the critical time, determined from a real shot record near the critical offset.

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News

About us

Upcoming meetings

A rough day at the AGU meeting, San Francisco 2007.
A rough day at the AGU meeting, San Francisco 2007.

Support

Major support for the lab comes from:


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