METHOD OF AND APPARATUS FOR EXPLORING A REGION BELOW A SURFACE OF THE EARTH

A passive method for exploring a region below the surface of the earth. The method comprises using a plurality of sensors to obtain seismic data obtained by recording ambient seismic interface waves in a frequency range whose lower limit is greater than 0 Hz, and whose upper limit is less than or eq...

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Bibliographic Details
Main Authors HANSSEN PETER, KUGLER SIMONE PATRICIA, BUSSAT SASCHA
Format Patent
LanguageEnglish
Published 24.02.2011
Subjects
CALCULATING
COMPUTING
COUNTING
DETECTING MASSES OR OBJECTS
ELECTRIC DIGITAL DATA PROCESSING
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:A passive method for exploring a region below the surface of the earth. The method comprises using a plurality of sensors to obtain seismic data obtained by recording ambient seismic interface waves in a frequency range whose lower limit is greater than 0 Hz, and whose upper limit is less than or equal to substantially 1 Hz. The sensors may be sensitive to three orthogonal components. Recordings may be made simultaneously by all sensors and normalization of data is unnecessary. The sensors may be moved and clean data may be selected. Local dispersion curves may be determined to improve vertical resolution. The data are processed so as to obtain a measure of the energy in a frequency band within the frequency range. The energy measure may be calculated by integrating the spectrum in the frequency domain over a desired frequency range. The resulting calculated energy provides information about the region of the earth being explored.
Bibliography:Application Number: US20080809467