Intrinsic Qp seismic attenuation from the rise time of microearthquakes: a local scale application at Rio‐Antirrio,Western Greece |
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Authors: | G‐Akis Tselentis Paraskevas Paraskevopoulos Nikos Martakis |
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Institution: | 1. Seismological Laboratory, Department of Geology, University of Patras, Rio Achaia, 26110 Patras, Greece;2. LandTech Enterprises, 16 Kifisias Str., Marousi, 15125 Athens, Greece |
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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. |
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Keywords: | Intrinsic quality factor |
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