Analytic minimum information deconvolution and its application to ocean bottom seismometer data

Abstract

Seismic refraction/wide angle reflection data for the study of the earth's crust generally lack resolution due to the low frequency wavelets from seismic sources. Standard deconvolution techniques to improve resolution of the data are limited by phase‐shifted waveforms such as supercritical reflections from the Moho as well as various refraction phases from the crust. We extended the minimum information deconvolution technique to the analytic formulation to deconvolve seismic data that contain phase‐shifted wavelets. When applied to a seismogram, analytic deconvolution yields the amplitude of the earth's impulse response function in the form of the signal envelope. An application example with ocean bottom seismometer data acquired along the Canadian continental margin of the Atlantic shows a remarkable improvement in resolution by compressing the wavelets effectively.