Abstract
Summary In fold and thrust belt settings, local earthquake events often occur and can be recorded when we lay down a patch of seismometers. We can then invert those seismic events to retrieve velocity information as it is done in global seismology. A passive data has been recorded over an exploration block in Albania where we can detect local earthquake events. After identifying them, we have applied a ray-based traveltime inversion and an acoustic waveform inversion. Because of the large velocity variations and the illumination issues, ray-based traveltime inversion seems to give bias results. The waveform inversion appears more robust and geological possible, as expected because some of the scattering effects that may happen within the Fresnel zone are accounted for. This comparative study suggests than waveform inversion applied on passive data can help in such a complex geological setting.
Published Version
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