Intrinsic Qp seismic attenuation from the rise time of microearthquakes: a local scale application at Rio-Antirrio, Western Greece

ABSTRACT We determine the attenuation structure of a three‐dimensional medium based on first pulse‐width measurements from microearthquake data. Ninety‐five microearthquakes from a seventy stations local network were considered in this study. Measurements of the first half cycle of the wave, the so‐...

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Bibliographic Details
Published in:Geophysical Prospecting 2010-09, Vol.58 (5), p.845-859
Main Authors: Tselentis, G.-Akis, Paraskevopoulos, Paraskevas, Martakis, Nikos
Format: Article
Language:English
Subjects:
Applied geophysics
Attenuation
Earth sciences
Earth, ocean, space
Exact sciences and technology
Internal geophysics
Intrinsic quality factor
Networks
Prospecting
Quality factor
Seismic engineering
Seismic phenomena
Seismograms
Stations
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Summary:ABSTRACT We determine the attenuation structure of a three‐dimensional medium based on first pulse‐width measurements from microearthquake data. Ninety‐five microearthquakes from a seventy stations local network were considered in this study. Measurements of the first half cycle of the wave, the so‐called rise time τ were carried out on high quality velocity seismograms and inverted to estimate the P‐waves intrinsic quality factor Qp. The results of this investigation indicate that first pulse width data from a local microearthquake network permit retrieval with sufficient accuracy of the heterogeneous Qp structure. The inferred attenuation variability corresponds to the known geological formations in the region.
ISSN:0016-8025
1365-2478
DOI:10.1111/j.1365-2478.2010.00885.x